In this Vehicle Platform Guide, you will find the top common issues of Mercedes-Benz C300 (W205, 2015–2021) 2.0L L4 Gasoline Base (RWD) / 4Matic (AWD), along with their fault codes, and the solutions from eEuroparts.com.
The Mercedes-Benz C300 (W205), produced from 2015 to 2021, is a luxury compact sedan powered by a 2.0L turbocharged inline-4 gasoline engine delivering refined performance and exceptional efficiency. Available in rear-wheel drive (RWD) or 4Matic all-wheel-drive (AWD) configurations, it offers versatility and control for diverse driving conditions. This model is equipped with premium features, including high-quality leather upholstery, advanced infotainment options, and cutting-edge safety technologies to ensure comfort, connectivity, and security for its occupants.
ABS/ESP sensor issues typically occur due to faulty wheel speed sensors, damaged wiring, brake component failures, or low battery voltage, disrupting the systems' functionality.
Symptoms:
Dashboard warning lights, such as ABS or ESP indicators staying illuminated.
Reduced braking efficiency, where the ABS system fails to activate during hard braking.
Loss of vehicle stability, especially during sharp turns or slippery conditions.
Erratic behavior, like sudden braking or uneven traction.
Difficulty maintaining control, particularly in emergency maneuvers.
Parts to Replace
Front Driver Left 2059054607 is a genuine OEM component designed to monitor wheel speed and ensure proper functioning of the ABS and ESP systems.
Rear 2059058503 is a high-quality component designed to monitor wheel speed and ensure proper functioning of the ABS and ESP systems.
Front Driver Side Hella 012679451 is a component designed to monitor wheel speed and ensure proper functioning of the ABS and ESP systems. It is compatible with various Mercedes-Benz models.
Stabilizer bar link wear typically occurs due to prolonged exposure to road vibrations, harsh driving conditions, or lack of lubrication, leading to component fatigue over time.
Symptoms:
Clunking or rattling noises, especially when driving over bumps or uneven roads.
Reduced vehicle stability, noticeable during cornering or sudden turns.
Excessive body roll, making the car feel less balanced.
Uneven tire wear, caused by improper suspension alignment.
Loose or imprecise steering, affecting overall handling.
Parts to Replace
Front Driver Side 2053230917 is a genuine OEM component designed to enhance suspension stability and reduce body roll during cornering.
Front Driver Left 2053230717 The Genuine Mercedes-Benz Suspension Stabilizer Bar Link is an essential component for your Mercedes-Benz vehicle’s suspension system.
Rear Driver Left 2053260317 The Genuine Mercedes-Benz Suspension Stabilizer Bar Link Kit is an essential component for your Mercedes-Benz.
Bison Performance BPSS20180 is a component designed to enhance suspension stability and reduce body roll during cornering.
Suspension strut noises typically occur due to worn bushings, damaged struts, loose components, or insufficient lubrication within the suspension system.
Symptoms:
Knocking or clunking sounds, especially when driving over bumps or uneven surfaces.
Squeaking or creaking noises, noticeable during turns or while steering.
Excessive bouncing or vibrations, indicating worn or damaged struts.
Uneven tire wear, caused by improper alignment due to strut issues.
Reduced handling stability, making the vehicle feel less responsive.
Air suspension compressor failure typically occurs due to overuse, excessive heat, water damage, or electrical issues such as faulty wiring or blown fuses.
Symptoms:
Vehicle sagging or sitting lower, especially after being parked overnight.
Unusual noises, such as grinding or clicking, during compressor operation.
Slow or incomplete lifting, where the vehicle struggles to reach its normal height.
Compressor running excessively, indicating leaks or inefficiency.
Warning lights on the dashboard related to suspension issues.
P0300 indicates random or multiple cylinder misfires, while P0301 to P0304 specify misfires in cylinders 1 through 4, respectively.
Why it happens:
Ignition coil concerns typically arise from wear and tear, overheating, faulty spark plugs, or electrical issues affecting the coil's performance.
Symptoms:
Engine misfires, as the coil fails to provide sufficient voltage to the spark plugs.
Difficulty starting the engine, especially in cold conditions or after prolonged inactivity.
Rough idling or vibrations when the vehicle is stationary.
Loss of power or sluggish acceleration during driving.
Decreased fuel efficiency, caused by incomplete combustion.
Illuminated check engine light, often indicating ignition system issues.
Parts to Replace
NGK Direct Ignition Coil PART # 49108 The Direct Ignition Coil with part number 49108, manufactured by NGK, is designed for various Mercedes-Benz models.
Rear Driver Left 2053500141 The Genuine Mercedes-Benz Suspension Knuckle is the perfect fit for your Mercedes-Benz.
Rear Passenger Right 2053500241 The Genuine Mercedes-Benz Steering Knuckle is a top-quality replacement part designed specifically for Mercedes-Benz vehicles.
Timing chain tensioner noise typically occurs due to insufficient tension in the timing chain, often caused by wear and tear, improper oil maintenance, or a faulty tensioner.
Symptoms:
Rattling or clicking sounds from the engine, especially during cold starts or idle, caused by a loose timing chain.
Rough idle or engine vibrations due to improper valve timing.
Decreased engine performance, such as sluggish acceleration or reduced fuel efficiency.
P2681 indicates an open circuit in the engine coolant bypass valve control, while P2600 signals an open circuit in the coolant pump control.
Why it happens:
Engine water pump failure typically occurs due to worn seals, corrosion, improper coolant maintenance, or excessive strain from a misaligned or over-tightened belt.
Symptoms:
Coolant leaks, often visible as puddles under the vehicle.
Engine overheating, indicated by a rising temperature gauge.
Whining or squealing noises from the engine bay, caused by worn bearings or a slipping belt.
Steam or white smoke coming from the radiator or engine area.
Fluctuating engine temperature, as the pump struggles to maintain consistent coolant flow.
P0335 to P0338 fault codes relate to crankshaft position sensor issues, ranging from circuit malfunctions to high or low input signals affecting engine timing and performance.
Why it happens:
Crankshaft position sensor issues typically occur due to overheating, electrical faults, or wear and tear affecting its ability to monitor crankshaft position accurately.
Symptoms:
Engine misfires or stalling, as the sensor fails to provide accurate timing data.
Difficulty starting the engine, especially in cold weather or after prolonged inactivity.
Reduced fuel efficiency, caused by improper engine timing and combustion.
Rough idling or vibrations when the vehicle is stationary.
P0340 to P0349 fault codes signify problems with the camshaft position sensor, such as circuit failures or inconsistent signals, which disrupt engine timing and performance.
Why it happens:
Camshaft position sensor issues typically occur due to wear, exposure to heat, electrical faults, or contamination affecting its signal accuracy.
Symptoms:
Difficulty starting the engine, as the sensor fails to accurately monitor camshaft position.
Engine misfires or rough idling, caused by incorrect timing data.
Reduced fuel efficiency, stemming from improper combustion cycles.
Loss of power or hesitation during acceleration.
Illuminated check engine light, indicating faults related to the camshaft sensor.
Erratic engine performance, with surges or stalling due to inconsistent signals.
P2747 signals an open circuit in the transmission fluid cooler control, while P2789 indicates performance problems with the cooler affecting transmission efficiency.
Why it happens:
Transmission oil cooler leaks or blockages typically occur due to corrosion, physical damage, improper maintenance, or debris clogging the cooler lines.
Symptoms:
Transmission fluid leaks, visible as puddles under the vehicle.
Overheating transmission, leading to erratic performance or potential damage.
Burning smell, caused by overheating fluid or contamination.
Discolored or contaminated transmission fluid, indicating improper cooling.
Difficulty shifting gears, such as slipping or delayed shifts.
Unusual noises, like whining or grinding, due to insufficient lubrication.
Parts to Replace
Engine Oil Cooler The Pierburg Automatic Transmission Oil Cooler part number 7.09269.74.0 is an essential component for your Mercedes-Benz.
Worn transmission mounts typically result from age-related wear, exposure to vibrations, improper installation, or physical damage.
Symptoms:
Excessive vibrations or noise, especially during idling or acceleration.
Clunking or thumping sounds, caused by movement of the transmission.
Misaligned drivetrain components, leading to uneven wear and reduced efficiency.
Difficulty shifting gears, with noticeable stiffness or delays.
Increased engine or transmission movement, visible during acceleration or braking.
Parts to Replace
Mercedes Automatic Transmission Mount 904103 The Genuine Mercedes-Benz Automatic Transmission Mount is a top-quality replacement part known for its exceptional performance and durability.
B24B213 indicates a control unit fault, while U0251 signifies a loss of communication with the headlamp control module, potentially affecting system functionality.
Why it happens:
Adaptive high beam malfunctions typically occur due to faulty sensors, electrical issues, software glitches, or obstructions affecting the system's ability to adjust headlights dynamically.
Symptoms:
Inconsistent headlight adjustment, where the beams fail to adapt to oncoming traffic or road conditions.
Error messages or warning lights on the dashboard related to the lighting system.
Reduced visibility, as the high beams may not activate or deactivate properly.
Flickering or dimming headlights, indicating electrical or sensor issues.
Failure to detect obstacles or vehicles, compromising the system's dynamic functionality.
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
What are the most common issues with the Mercedes-Benz C300 (W205, 2015–2021)?⌄
Some common issues reported by owners include premature brake wear, suspension noise, oil leaks, and minor electronic malfunctions. Regular maintenance and genuine replacement parts from eEuroparts.com help prevent these problems.
How often should I service my Mercedes-Benz C300 (W205)?⌄
Mercedes recommends a service every 10,000 miles or 12 months, whichever comes first. Routine services include oil and filter changes, brake inspections, and fluid checks to ensure long-term performance and reliability.
What kind of engine does the 2015–2021 Mercedes-Benz C300 have? ⌄
The C300 (W205) is powered by a 2.0L turbocharged inline-4 gasoline engine, delivering around 241 horsepower. It’s paired with a 7G-TRONIC or 9G-TRONIC automatic transmission, offering a smooth and efficient driving experience.
Is the Mercedes-Benz C300 (W205) rear-wheel or all-wheel drive?⌄
The C300 is available in both Rear-Wheel Drive (RWD) and 4MATIC All-Wheel Drive (AWD) configurations. The AWD version provides improved traction and handling, especially in wet or snowy conditions.
What is the fuel economy of the Mercedes-Benz C300 (2015–2021)? ⌄
The EPA-estimated fuel economy for the C300 is about 25 MPG city / 34 MPG highway for RWD models and 24 MPG city / 33 MPG highway for AWD models, depending on driving habits and maintenance.
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