In this Vehicle Platform Guide, you will find the top common issues of Mercedes-Benz GL450 / GLS450 (X166; 2015-2019) 3.0L Bi-Turbocharged V6, along with their fault codes, and the solutions from eEuroparts.com.
The 2015-2019 Mercedes-Benz GL450 / GLS450 (X166) 3.0L Bi-Turbocharged V6 is a full-size luxury SUV that combines commanding road presence with refined performance and family-friendly versatility. Powered by a 3.0L twin-turbocharged V6 gasoline engine (M276), it delivers up to 362 horsepower and 369 lb-ft (500 Nm) of torque. Paired with a 9-speed 9G-TRONIC automatic transmission and Mercedes’ 4MATIC all-wheel drive system, it accelerates from 0 to 100 km/h in approximately 6.6 seconds and reaches a top speed of 240 km/h.
Specifications
Engine and Powertrain
Engine:
3.0L V6 Bi-Turbocharged
Engine Code:
M276 DE 30 AL
Horsepower:
362 hp at 5,500 rpm
Torque:
369 lb-ft at 1,800-4,500 rpm
Fuel Type:
Premium Gasoline
Transmission:
9-Speed Automatic (9G-TRONIC)
Fuel Economy (EPA Estimates)
City/Highway Combined:
~17-22 MPG
Vehicle Weight
Curb Weight:
~ 5,500 lbs
Gross Weight:
~ 7,400 lbs
Configurations and Submodels
Body Styles:
SUV
Seating Capacity:
7
Drivetrain Options:
4MATIC All-Wheel Drive (Standard)
Top Common Issues with Mercedes-Benz GL450 / GLS450 (X166; 2015-2019) 3.0L Bi-Turbocharged V6
ABS Wheel Speed Sensor
1. ABS Wheel Speed Sensor Failure
Fault Codes:
C0035 and C0040 indicate ABS faults in the left and right front wheel speed sensors, typically due to sensor failure, wiring issues, or damaged reluctor rings.
Why it happens:
ABS wheel speed sensor failure typically occurs due to contamination from brake dust or debris, damaged wiring, corroded connectors, or worn reluctor rings.
Symptoms:
ABS warning light illuminated on the dashboard
Loss of anti-lock braking function, especially during hard braking
Pulsating brake pedal, even under normal braking conditions
Disabled traction or stability control systems, with corresponding warning lights
Speedometer malfunction, particularly in older vehicles
Inconsistent braking behavior, such as premature lock-up or skidding
Parts to replace:
Front Part # 360470 The ATE ABS Wheel Speed Sensor is a reliable and durable replacement part designed for Mercedes-Benz vehicles.
C249F, P0556, and C1234 indicate brake system faults - typically involving SBC pump wear, pressure sensor performance issues, and degraded ABS function due to sensor or hydraulic faults.
Why it happens:
Brake booster vacuum pump failure typically occurs due to worn seals, cracked vacuum lines, faulty check valves, or internal pump wear from heat and age.
Symptoms:
Stiff or hard brake pedal, requiring more effort to stop the vehicle
Increased stopping distance, especially during emergency braking
Intermittent or weak brake assist, where braking feels inconsistent
Hissing noise when pressing the brake pedal, indicating a vacuum leak
Illuminated ABS or brake warning lights on the dashboard
Engine performance issues, such as rough idle or stalling (in vacuum-integrated systems)
Parts to Replace
OEM Mercedes Power Brake Booster 1664301030 The Genuine Mercedes-Benz Power Brake Booster part number 1664301030 / 166 430 10 30 is an essential component for your Mercedes-Benz vehicle’s braking system.
OEM Mercedes Power Brake Booster Vacuum Sensor 0009059203 The Genuine Mercedes-Benz Power Brake Booster Vacuum Sensor part number 0009059203 / 000 905 92 03 is an essential component that enhances the brake system of your Mercedes-Benz.
C13A6, C13A7, and U0128 indicate electric parking brake faults-typically involving actuator motor failure, position sensor errors, or lost communication with the parking brake control module.
Why it happens:
Parking brake actuator failure typically occurs due to motor burnout, gear wear, moisture intrusion, corroded connectors, or control module faults.
Symptoms:
Parking brake warning light or error message on the dashboard
Failure to engage or release the parking brake, especially during startup or shutdown
Grinding or clicking noises from the rear wheels when activating the brake
Vehicle rolling on inclines, indicating the brake isn’t holding properly
Intermittent or delayed response when pressing the parking brake switch
Diagnostic trouble codes like C13A6, C13A7, or U0128 stored in the system
Parts to Replace
OEM Mercedes Parking Brake Actuator - Rear 1669065401 The Genuine Mercedes-Benz Parking Brake Actuator part number 1669065401 / 166 906 54 01 is a top-of-the-line replacement part designed specifically for Mercedes-Benz vehicles.
C156E and C1511 indicate ride height system calibration and control module faults - typically caused by sensor miscalibration, wiring issues, or module failure.
Why it happens:
AIRMATIC air suspension compressor failure typically occurs due to overuse from air leaks, moisture intrusion, clogged valve blocks, or electrical faults.
Symptoms:
Noticeable drop in ride height, especially after the vehicle has been parked overnight
Harsh or bouncy ride, due to insufficient air pressure in the suspension
Suspension warning light or “AIRMATIC malfunction” message on the dashboard
Unusual compressor noises, such as loud humming or extended running times
Uneven or delayed vehicle lift, where one side rises slower or not at all
Frequent cycling of the compressor, indicating it's overworking to maintain pressure
No response from height adjustment controls, suggesting the system isn’t pressurizing properly
Parts to Replace
Compressor P-3258 The Arnott Industries Air Suspension Compressor is a reliable and durable replacement for Mercedes-Benz vehicles.
C1517 and C156E indicate faults in the air suspension system - typically involving control module errors and ride height calibration issues due to sensor faults.
Why it happens:
Air spring leaks typically occur due to rubber fatigue, punctures from road debris, improper installation, or aging seals and fittings.
Symptoms:
Vehicle sagging on one side or corner, especially after being parked overnight
Uneven ride height, where one end sits noticeably lower than the other
Frequent or prolonged compressor operation, indicating it's overworking to maintain pressure
Rough or bouncy ride, due to insufficient air support
Warning lights or suspension fault messages on the dashboard
Hissing sounds near the wheel wells, especially after shutdown
Visible cracks or dry rot on the air spring bellows during inspection
Parts to Replace
Arnott Mercedes Air Spring A2596 The Arnott Industries Air Suspension Spring part number A-2596 is a reliable and high-quality replacement part for Mercedes-Benz vehicles.
C1525-001, C156E, and C1511 indicate air suspension issues from sensor miscalibration, reservoir pressure faults, or control module errors.
Why it happens:
Suspension self-leveling valve failure typically occurs due to internal wear, fluid contamination, corroded linkages, or misalignment from chassis movement.
Symptoms:
Uneven ride height, where one side or axle sits noticeably lower
Frequent compressor cycling, as the system struggles to maintain pressure
Bouncy or harsh ride, due to improper air distribution
Sagging after parking, especially overnight
Increased tire wear or poor alignment from inconsistent suspension geometry
Warning lights or suspension fault messages on the dashboard
Hissing sounds near the valve area, indicating air leakage
OEG Air Suspension Solenoid Valve Unit Part # OEG-2879 The Air Suspension Solenoid Valve Unit by OEG is a direct-fit replacement designed to manage air distribution in Mercedes-Benz vehicles equipped with AIRMATIC suspension systems.
Fault codes P0351-P0356 and P0300-P0306 indicate ignition coil circuit faults and misfires across cylinders 1-6, often caused by failing coils, wiring issues, or spark plug problems.
Why it happens:
Ignition coil failure typically results from heat stress, vibration, oil contamination, or worn spark plugs causing excessive voltage demand and internal breakdown.
Symptoms:
Engine misfires, especially under load or during acceleration.
Rough idle or vibration at stoplights or in park.
Hard starting or extended cranking time before the engine fires.
Loss of power and sluggish throttle response.
Poor fuel economy, due to incomplete combustion.
Check engine light (CEL) with codes like P0351-P0356 or P0300-P0306.
Backfiring or fuel smell from unburned fuel in the exhaust.
Stalling, particularly at low speeds or when shifting into gear.
Parts to Replace
NGK Mercedes-Benz Ignition Coil 49107 The Mercedes-Benz ignition coil NGK is an OEM-spec coil designed for 3.0L V6 twin-turbo engines (M276) found in a wide range of models.
The Ignition Coil Kit (Laser Iridium) - Part #5141416-Kit is a premium OE-spec bundle tailored for Mercedes-Benz M276 V6 engines.
Bosch Mercedes Ignition Coil Kit (Iridium) 4189212 The Mercedes Ignition Coil Kit (Iridium) - Bosch is a high-performance, OE-quality solution designed for M276 V6 engines found in a wide range of Mercedes-Benz models.
Fault codes P0335 and P0336 indicate issues with the crankshaft position sensor circuit-typically a failed sensor, damaged wiring, or timing irregularities.
Why it happens:
Crankshaft position sensor failure typically results from prolonged heat exposure, vibration, oil contamination, or aging electronics degrading signal accuracy.
Symptoms:
Hard starting or no start, especially when the engine is hot.
Intermittent stalling while driving, due to signal loss.
Check engine light (CEL) with codes like P0335 or P0336.
Engine misfires or rough idling from incorrect timing data.
Reduced power and poor acceleration, as the ECU struggles to manage ignition and fuel delivery.
Increased fuel consumption, caused by inefficient combustion.
Tachometer fluctuations or erratic RPM readings.
Parts to Replace
Mercedes Engine Crankshaft Position Sensor 2769050700 The Genuine Mercedes-Benz Engine Crankshaft Position Sensor part number 2769050700 / 276 905 07 00 is a crucial component for the proper functioning of your Mercedes-Benz.
Mercedes Crankshaft Positon Sensor 2769051200 The Genuine Mercedes-Benz Engine Crankshaft Position Sensor part number 2769051200 / 276 905 12 00 is a top-quality replacement part for your Mercedes-Benz vehicle.
Mercedes Engine Crankshaft Position Sensor 2769051500 The Genuine Mercedes-Benz Engine Crankshaft Position Sensor is an essential component for your Mercedes-Benz that ensures the smooth running of your vehicle’s engine.
C1026, U0415, and U0103 indicate steering sensor faults and CAN bus errors affecting ABS and gear shift module communication.
Why it happens:
Steering shaft failure typically occurs due to worn universal joints, corrosion, impact damage from curbs or potholes, or misalignment from chassis stress.
Symptoms:
Clunking or popping noises when turning the steering wheel, especially at low speeds
Steering wheel play or looseness, where there’s a delay before the wheels respond
Binding or resistance during turns, making the wheel feel stiff or jerky
Vibration in the steering wheel, particularly while driving over uneven surfaces
Steering wheel misalignment, where it doesn’t return to center or feels off-angle
Inconsistent steering response, especially during quick maneuvers or lane changes
Parts to Replace
OEM Mercedes Steering Shaft - Upper 1664620013 The Genuine Mercedes-Benz Steering Shaft part number 1664620013 / 166 462 00 13 is an exceptional component that is designed to replace the old, worn-out or damaged steering shaft in your Mercedes-Benz.
C1012, C1511, and U0416 suggest sensor misalignment or data errors from ride height, steering angle, and vehicle dynamics modules.
Why it happens:
Steering knuckle failure typically occurs due to impact damage from potholes or curbs, corrosion at mounting points, or deformation from worn bushings.
Symptoms:
Clunking or grinding noises when turning, especially over bumps or uneven roads
Steering wheel vibration at higher speeds due to misalignment or imbalance
Vehicle pulling to one side, even when the wheel is centered
Uneven or rapid tire wear, often on one edge
Loose or unresponsive steering, with delayed wheel reaction
Steering wheel not returning to center after a turn
Visible damage or deformation near the knuckle or mounting points
Parts to Replace
Front Passenger Right 1663301020 The Genuine Mercedes-Benz Steering Knuckle part number 1663301020 / 166 330 10 20 is an essential component that plays a significant role in ensuring the smooth functioning of your Mercedes-Benz.
Front Driver Left 1663300920 The Genuine Mercedes-Benz Steering Knuckle part number 1663300920 / 166 330 09 20 is a top-of-the-line replacement part for your Mercedes-Benz vehicle.
OEM Mercedes Wheel Bearing - Rear 1669810006 This Genuine Mercedes-Benz Wheel Bearing with part number 1669810006 / 166 981 00 06 is a must-have for your Mercedes-Benz ride if you’re looking for a long-lasting, high-quality replacement part.
C10C3, C1028, and U0415 indicate steering rack deviation, protective shutdown of electric steering assist, and invalid ABS data.
Why it happens:
Rack and bellow failure typically occurs due to torn or degraded boots from age, road debris, improper installation, or lack of lubrication causing contamination and steering rack wear.
Symptoms:
Clunking or knocking noises when turning, especially at low speeds
Stiff or heavy steering, particularly during parking maneuvers
Visible tears or grease leakage from the rubber bellows (dust boots)
Power steering fluid leaks, leading to low fluid levels and assist loss
Steering wheel vibration or looseness due to internal rack wear
Uneven tire wear or poor alignment retention
Oily spots under the vehicle, especially near the steering rack area
Parts to Replace
OEM Mercedes Tie Rod Boot - Front Inner 1664600196 The Genuine Mercedes-Benz Rack and Pinion Bellows part number 1664600196 / 166 460 01 96 is a top-quality component designed specifically for Mercedes-Benz vehicles.
The fault codes P0300 through P0306 indicate random and cylinder-specific misfires, P0172 and P0175 point to an overly rich fuel mixture in both banks, and P0507 signals a high idle speed.
Why it happens:
Engine intake valve failure typically occurs due to poor sealing, overheating, or mechanical interference - often from timing issues or carbon buildup.
Symptoms:
Loss of power and acceleration due to poor cylinder compression.
Rough idling or engine shaking, especially at low RPMs.
Misfires, often accompanied by fault codes like P0300-P0306.
Difficulty starting the engine, particularly when cold.
Backfiring through the intake manifold.
Increased fuel consumption and poor mileage.
Ticking or popping noises from the valve train.
Blue or white smoke from the exhaust if oil or unburned fuel escapes combustion.
Parts to Replace
OEM Mercedes Engine Intake Valve 2760500026 The Genuine Mercedes-Benz Engine Intake Valve part number 2760500026 / 276 050 00 26 is a top quality replacement for your Mercedes-Benz vehicle.
Intake 2760530720 The Genuine Mercedes-Benz Engine Valve Spring, part number 2760530720 / 276 053 07 20 is a high-quality replacement part designed specifically for Mercedes-Benz vehicles.
Exhaust 2760530420 The Genuine Mercedes-Benz Engine Valve Spring part number 2760530420 / 276 053 04 20 is an essential component for maintaining the optimal performance of your Mercedes-Benz.
OEM Mercedes Valve Stem Seal Kit 2780530100 The Genuine Mercedes-Benz Engine Valve Stem Oil Seal part number 2780530100 / 278 053 01 00 is an essential component of the Mercedes-Benz engine.
The combination of P0299, P2261, and P0234 fault codes suggests inconsistent turbocharger performance - ranging from underboost to overboost.
Why it happens:
Turbocharger diverter valve failure typically occurs when the internal rubber diaphragm ruptures, often due to heat, pressure cycling, or oil contamination.
Symptoms:
Loss of power or sluggish acceleration, especially under boost.
Fluttering or honking noises when lifting off the throttle-caused by boost pressure not being properly vented.
Check engine light (CEL), sometimes flashing under load.
Boost pressure fluctuations, noticeable on a gauge or through inconsistent performance.
Compressor surge, which can sound like a rapid whoosh or flutter and may damage the turbo over time.
Increased exhaust noise or backfiring in some cases.
The combination of P0201-P0206, P0300, and P0171/P0174 suggests injector circuit faults causing lean conditions and random misfires across all cylinders.
Why it happens:
Fuel injector failure typically results from internal clogging, electrical faults, or seal degradation - often caused by fuel contamination, heat, or wear over time.
Symptoms:
Rough idle or engine stalling, especially at stoplights or during cold starts.
Engine misfires, leading to hesitation or jerking during acceleration.
Check engine light (CEL) triggered by injector-related fault codes like P0201-P0206.
Poor fuel economy, as the engine compensates for uneven fuel delivery.
Fuel odor, caused by leaking injectors or unburned fuel.
Hard starting, particularly after the vehicle has been sitting.
Excessive exhaust smoke, often black or white depending on the failure mode.
Loss of power or sluggish throttle response, due to lean or rich air-fuel mixtures.
Parts to Replace
Mercedes Fuel Injector 256070018780 - 62437 The Mercedes fuel injector 256070018780, also known as Bosch 62437, is a high-pressure direct injection unit designed for modern gasoline engines.
The Fuel Injector Kit 5141143-Kit by Bosch includes the Bosch 62437 fuel injector along with three genuine Mercedes-Benz O-ring kits (1770720000).
Mercedes Spark Plug 0041596903 The Mercedes spark plug 0041596903 is a genuine OEM part commonly used in a wide range of Mercedes-Benz models, including the C300, E350, GLE350, GLS450, C43 AMG.
Mercedes-Benz Spark Plug 96427 The NGK 96427 spark plug, also known by its part number SILZKFR8G7S, is a Laser Iridium plug engineered for high-performance Mercedes-Benz engines.
Fault codes P0087, P0191, and P053F indicate fuel rail pressure issues-often from a weak fuel pump, faulty sensor, or cold-start pressure loss.
Why it happens:
High-pressure fuel pump failure typically results from mechanical wear, poor lubrication, or fuel contamination - often worsened by skipped oil changes or incorrect engine oil.
Symptoms:
Hard starting or no start, especially after the vehicle has been sitting.
Loss of power or hesitation during acceleration, particularly under load or at higher RPMs.
Engine misfires or surging, due to inconsistent fuel delivery.
Poor fuel economy, as the engine compensates for low pressure.
Check engine light (CEL) with codes like P0087, P0191, or P053F.
Whining or buzzing noises from the fuel tank area.
Stalling, especially during warm-up or under heavy throttle.
Fuel smell in exhaust, indicating rich or unburned fuel conditions.
P0615, B1036, and U0100 indicate starter relay circuit failure and ECM communication loss-often from wiring, relay, or module faults.
Why it happens:
Starter failure typically occurs due to worn brushes, solenoid issues, heat damage, or poor electrical connections-often worsened by age or oil contamination.
Symptoms:
Clicking sound when turning the key, but the engine doesn’t crank.
No response at all-dashboard lights may come on, but the engine stays silent.
Intermittent starting issues, where the engine starts sometimes but not always.
Slow or labored cranking, as if the engine is struggling to turn over.
Grinding noise, indicating the starter gear isn’t engaging properly with the flywheel.
Smoke or burning smell, often from overheating due to repeated failed starts.
Oil-soaked starter, which can short the unit or cause internal corrosion.
Parts to Replace
Bosch Mercedes Starter Motor 276906250080 SR9600X The Mercedes starter motor 276906250080, also known as Bosch SR9600X, is a remanufactured OEM unit designed for 3.0L V6 engines in various Mercedes-Benz models.
Fault codes B10B7, B10B9, and U0424 indicate an open blower motor circuit, a faulty blower control module, and invalid HVAC data.
Why it happens:
Blower motor failure typically occurs due to overheating from airflow restriction, worn bearings, electrical faults, or internal corrosion from moisture or debris.
Symptoms:
No airflow from vents, even when the fan is set to high.
Weak or inconsistent airflow, often caused by worn brushes or failing motor windings.
Unusual noises like grinding, squealing, or rattling from behind the dashboard.
Burning smell or smoke from vents, indicating overheating or electrical short.
Blower only works on certain speeds, often due to a failing resistor or control module.
Frequent fuse or circuit breaker trips, suggesting internal motor faults or excessive current draw.
Blower runs continuously, even with ignition off-usually a control module or relay issue.
Parts to Replace
Front 1669066100 The Genuine Mercedes-Benz HVAC Blower Motor Assembly part number 1669066100 / 166 906 61 00 is a must-have replacement for your car’s HVAC system.
Rear 1669060012 The Genuine Mercedes-Benz HVAC Blower Motor part number 1669060012 / 166 906 00 12 is an essential component that ensures the efficient functioning of your Mercedes-Benz’s heating, ventilation, and air conditioning system.
Mahle Blower Motor Assembly Part # AB231000S The MAHLE HVAC Blower Motor AB231000S is a high-quality replacement part designed to fit perfectly with the Mercedes-Benz part number 1669066100.
P0130 and P0150 signal O2 sensor circuit faults on Banks 1 and 2; P0141 indicates a heater circuit failure.
Why it happens:
Oxygen sensor failure typically occurs due to age-related wear, contamination from fuel additives or oil, or prolonged exposure to high exhaust temperatures.
Symptoms:
Illuminated check engine light, typically triggered by codes like P0130, P0150, or P0141
Poor fuel economy, as the engine runs rich due to incorrect air-fuel ratio readings
Rough idle or engine misfires, especially noticeable at stoplights or during cold starts
Stalling or hesitation, particularly when accelerating or shifting gears
Failed emissions test, due to improper combustion and high pollutant output
Black smoke or sulfur smell from the exhaust, caused by excess unburned fuel
Reduced engine performance, including sluggish throttle response or power loss
Parts to Replace
Upstream right Front 0095425518 - 17339 The Bosch 17339 is a direct-fit front (upstream) oxygen sensor that cross-references with Mercedes-Benz part number 0095425518.
Downstream Driver Left 0085426218 - 2344983 The Mercedes Oxygen Sensor - Downstream Driver Left, part number 0085426218 (Denso 234-4983), is a heated 4-wire sensor designed to monitor post-catalyst emissions.
P0443-P0456 fault codes signal purge valve or EVAP leaks, often from faulty valves, gas caps, cracked hoses, or wiring.
Why it happens:
Vapor canister purge solenoid failure typically occurs due to electrical faults, vacuum leaks, internal sticking from contaminants, or damage from excessive pressure or heat.
Symptoms:
Check engine light (CEL), frequently triggered by codes like P0443, P0441, P0455, or P0456
Rough idle, especially when the valve is stuck open, causing a vacuum leak
Hard starting, due to excess fuel vapor entering the intake during startup
Poor engine performance, including hesitation or sluggish acceleration
Increased emissions, potentially leading to failed emissions tests
Fuel odor, especially near the engine bay or fuel tank area
Reduced fuel economy, as unmetered vapors disrupt combustion efficiency
Parts to Replace
OEM Mercedes Vapor Canister 1664700359 The Genuine Mercedes-Benz Vapor Canister is a crucial component in the proper functioning of your Mercedes-Benz vehicle.
Part # 0004760600 The Genuine Mercedes-Benz Vapor Canister Purge Solenoid is an essential component of the fuel system in your Mercedes-Benz.
1. Automatic Transmission Valve Body Solenoid Failure
Fault Codes:
P0750-P0770, P2714, P0720, and P2709 suggest solenoid or sensor faults in the transmission - often electrical, fluid-related, or mechanical.
Why it happens:
Automatic transmission valve body solenoid failure typically occurs due to fluid contamination, overheating, electrical faults, or internal wear causing sticking or pressure loss.
Symptoms:
Harsh or delayed shifting, especially when moving from Park to Drive or Reverse
Erratic gear changes, such as upshifting or downshifting at the wrong time
Shift flares, where engine RPM spikes during gear changes instead of dropping
Slipping gears, where the transmission fails to hold a gear under load
Failure to shift, leaving the vehicle stuck in one gear or neutral
Banging or knocking sounds during gear engagement
Check engine light, often accompanied by codes like P0750-P0770, P2714, or P2709
P0720 and P0722 indicate output speed sensor circuit faults or signal loss, while P0730 signals incorrect gear ratio.
Why it happens:
Automatic transmission output shaft failure typically results from worn bearings, fluid leaks, U-joint damage, or excessive heat and contamination.
Symptoms:
Vibrations during acceleration, especially at higher speeds or under load
Clunking or knocking noises when shifting gears or cornering
Fluid leaks near the rear of the transmission, often from a worn output shaft seal
Difficulty shifting gears, even when the rest of the transmission seems functional
Loss of power to the wheels, despite engine revving normally
Check engine light, potentially triggered by codes like P0720 or P0722
Visible play or wobble in the driveshaft or output flange during inspection
Parts to Replace
Mercedes Automatic Transmission Output Shaft 2202700926 The Genuine Mercedes-Benz Automatic Transmission Output Shaft, part number 2202700926 / 220 270 09 26, is a high-quality replacement part designed specifically for Mercedes-Benz vehicles.
Mercedes Automatic Transmission Output Shaft 220270092628 The Genuine Mercedes-Benz Automatic Transmission Output Shaft part number 220270092628 is a highly efficient and reliable car part that guarantees optimal performance of your Mercedes-Benz vehicle.
OEM Mercedes Manual Trans Output Shaft Seal 0159971246 The Genuine Mercedes-Benz Automatic Transmission Extension Housing Seal is a high-quality replacement part designed to seamlessly fit into your Mercedes-Benz vehicle.
P0711, P0894, P2706, and P0868 indicate issues with transmission fluid temperature, slipping components, solenoid performance, and low fluid pressure.
Why it happens:
Automatic transmission oil pump failure typically occurs due to fluid contamination, clogged filters, cold-start abuse, or excessive internal wear from overheating.
Symptoms:
Delayed or no gear engagement, especially when shifting into Drive or Reverse
Whining or buzzing noises from the transmission area, increasing with engine RPM
Low or erratic line pressure, leading to harsh or slipping shifts
Overheating transmission fluid, often accompanied by a burnt smell
Transmission slipping or flaring, where RPM rises without corresponding acceleration
Warning lights or fault codes, such as P0868, P0894, or P0711
Fluid leaks near the front pump seal or torque converter housing
Parts to Replace
OEM Mercedes Auto Trans Oil Pump - Front 7222700197 The Genuine Mercedes-Benz Automatic Transmission Oil Pump Assembly part number 7222700197 / 722 270 01 97 is an excellent replacement part for your Mercedes-Benz.
Mercedes Automatic Transmission Oil Pump Seal 0139970946 The Genuine Mercedes-Benz Automatic Transmission Oil Pump Seal Part Number 0139970946 is a top-quality replacement part that is designed specifically for Mercedes-Benz vehicles.
Mercedes Auto Trans Oil Pump O-Ring 0169971448 The Genuine Mercedes-Benz Automatic Transmission Oil Pump Seal, part number 0169971448/016 997 14 48, is an essential component of your vehicle’s transmission system.
P181C, C1142, and U0403 reflect sensor, motor, or data faults in the transfer case - typically electrical, mechanical, or communication-related.
Why it happens:
Transfer case motor failure typically occurs due to worn gears, electrical faults, moisture intrusion, or binding from lack of use or lubrication.
Symptoms:
Failure to shift into or out of 4WD, or getting stuck in a specific drive mode
Clicking, grinding, or whining noises during mode changes or while driving
4WD warning lights or service messages on the dashboard
Intermittent or unresponsive 4WD engagement, especially in cold or wet conditions
Jerking or binding when turning, due to improper torque distribution
No movement in front or rear wheels if the motor fails mid-engagement
Diagnostic trouble codes like C1142, P181C, or U0403 stored in the TCCM
Parts to Replace
OEM Mercedes Transfer Case Motor 1645400188 The Genuine Mercedes-Benz Transfer Case Motor is an essential part for your Mercedes-Benz that ensures the smooth functioning of your vehicle’s transfer case.
URO Mercedes Transfer Case Motor Gear 27-10-2-413-711-PRM The URO Transfer Case Motor Gear Part Number 27-10-2-413-711-PRM is a top-quality car part designed to enhance the performance of your BMW or Mercedes-Benz transfer case.
Transmission mount deterioration typically results from age-related rubber breakdown, fluid contamination, excessive engine movement, or impact stress from rough driving or accidents.
Symptoms:
Clunking or banging noises, especially during acceleration, braking, or gear changes
Excessive vibrations felt through the cabin, particularly at idle or low speeds
Drooping or misaligned transmission, visible during inspection
Chassis flex or movement, as the transmission shifts under load
Cracked or collapsed rubber bushings, reducing vibration dampening
Difficulty shifting gears or drivetrain misalignment
Increased engine or transmission movement, noticeable when revving in neutral or shifting from Park to Drive
Parts to Replace
Mercedes Transmission Mount 1662401118 The Mercedes-Benz Transmission Mount is a genuine OEM component designed to support and isolate the transmission from chassis vibrations.
Mercedes Automatic Transmission Mount 1662400918 The Genuine Mercedes-Benz Automatic Transmission Mount is an essential component for Mercedes-Benz vehicles, specifically designed to provide outstanding performance and longevity.
eEuroparts offers a wide selection of OEM and well-reviewed aftermarket parts chosen for compatibility with Mercedes-Benz vehicles. Parts are listed with fitment details and trusted brand options to help you find components that are appropriate for routine maintenance and common repairs.
Exceptional Delivery, Unmatched Logistics
We know that every moment counts when your car is out of commission. That’s why we focus on getting your parts to you as quickly as possible. Our efficient logistics network and fast shipping mean minimal downtime for your vehicle.
Competitive Prices, Superior Value
Our catalog includes everything from timing chains, camshaft adjusters, and PCV valves to wheel bearings, control arms, and fuel pumps, sourced to meet or exceed OE standards. Whether you prefer genuine Mercedes-Benz parts or trusted aftermarket brands, we offer top-tier quality at better-than-dealer pricing.
Trusted Excellence
Our catalog includes parts from top-tier brands like Bosch, INA, ZF, Pierburg, Elring, Lemforder, and Rein. Whether you're resolving transmission issues, electrical faults, or suspension wear, our parts meet or exceed OEM standards for fit, durability, and performance.
Conclusion
Whether you’re replacing worn items or addressing a specific fault, use these listings to identify likely parts and plan repairs. For vehicle-specific advice, consult a trusted technician to confirm fitment and service steps before installation.
Frequently Asked Questions
Is the Mercedes-Benz GL450/GLS450 reliable for long-term ownership?⌄
Yes, it’s generally reliable when maintained on schedule. Most owners focus on timely oil changes, spark plugs, suspension checks, and cooling-system upkeep to keep the SUV running strong.
What common issues do GL450/GLS450 owners usually report?⌄
Drivers often discuss air suspension wear, ignition coil failures, turbo-related oil leaks, and occasional electrical quirks. Most problems are manageable with preventive maintenance.
How expensive is maintenance for the GL450/GLS450? ⌄
Maintenance isn’t cheap because it’s a luxury SUV, but costs stay reasonable when using OEM-quality parts and doing regular service rather than waiting for bigger repairs.
What fuel economy can I realistically expect?⌄
Owners typically see lower gas mileage than smaller SUVs, especially in city driving. Highway mileage tends to be better, but this model prioritizes power over fuel savings.
What should I check before buying a used GL450/GLS450? ⌄
Most buyers look closely at air suspension condition, service history, oil leaks, turbo performance, and electronics. A pre-purchase inspection is highly recommended.
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★★★★★
I have experience with eEuroparts… "I have experience with eEuroparts longtime and they good parts of Mercedes and all fits my car. They have excellent quality parts.” - Mohamed Abbas
★★★★★
eEuroparts My No 1 go to. "eEuroparts has good prices and hassle free service. They have lots of parts for my North American MB Sprinter but you have to know what you need as they often default to the European Sprinter models and not all the parts are the same. Having said that. I got high quality parts at a great price and they fit perfectly. Lots of quality brand names to choose from and good selection. This is now the first place I look for parts." -Daniel R
Shop now at eEuroparts.com - your trusted partner for quality automotive parts at unbeatable prices!
Apr 13, 2025Celebrating 25 Years of Excellence at eEuropartsSince its inception in 2000, eEuroparts has been dedicated to providing European car owners and enthusiasts throughout the United States with top-quality Genuine, OEM, and premium aftermarket parts. What started as a small passion project has evolved into a prominent player in the auto parts sector, renowned for its dependability, swift shipping, and unparalleled customer service. Over the years, we've successfully processed more than 20 million orders, ensuring that premium European parts are accessible no matter your location.
Aug 18, 2024Saab 9-3 Lower Control Arm Symptoms and ReplacementThe Saab 9-3 is cherished by automotive enthusiasts for its unique design and turbocharged performance, representing a high point in Swedish automotive engineering. This model has fostered a dedicated following, even after Saab's exit from the automotive market. However, like many vehicles that age, the Saab 9-3 presents maintenance challenges, particularly regarding its lower control arm—a key element of the suspension system.
Aug 12, 20242018 Mercedes-Benz Sprinter 2500 Oil Cooler Leaks ExplainedIf you're the proud owner of a 2018 Mercedes-Benz Sprinter 2500, you value its reliability for a variety of uses, from deliveries to road trips. However, like all vehicles, it's not without its issues, with oil cooler leaks being a common concern among owners. While the term oil cooler may sound technical, this guide will simplify the topic and provide you with essential insights.
Aug 6, 20242013 Mercedes-Benz G550 Secondary Air Pump IssuesThe 2013 Mercedes-Benz G550 is a luxurious SUV recognized for its impressive performance and off-road capabilities. A crucial component that ensures its smooth operation and compliance with strict emissions standards is the secondary air pump. This essential part of the emissions system reduces harmful exhaust emissions during the initial startup phase, particularly when the engine is cold.
