In this Vehicle Platform Guide, you will find the top common issues of Mercedes-Benz C230 (W203, 2003–2005) 1.8L L4 Gasoline Kompressor / Sport Sedan, along with their fault codes, and the solutions from eEuroparts.com
The Mercedes-Benz C230 (W203), produced from 2003 to 2005, is a luxury compact sedan powered by a 1.8L inline-4 gasoline engine with a supercharger, delivering a spirited performance of 189 horsepower. It features a 5-speed automatic transmission, ensuring smooth gear shifts for an engaging driving experience. Equipped with rear-wheel drive, this model offers dynamic handling and stability. The C230 boasts premium features such as high-quality interior materials, advanced safety systems, and a spacious trunk, providing comfort, security, and practicality for its occupants.
Specifications
Engine and Powertrain
Engine:
1.8L Inline-Four Supercharged (Kompressor)
Engine Code:
M271
Transmission:
6-Speed Manual or 5-Speed Automatic
Fuel Type:
Gasoline
Horsepower:
~189 hp @ 5,800 rpm
Torque:
~192 lb-ft @ 3,500 rpm
Fuel Economy (EPA Estimates)
City/Highway Combined:
~ 19-26 MPG
Vehicle Weight
Curb Weight:
~ 3,310 lbs
Gross Weight:
~ 4,442 lbs
Configurations and Submodels
Body Styles:
Sedan
Seating Capacity:
5 passengers
Drivetrain Options:
Rear-Wheel Drive (RWD)
Top Common Issues with Mercedes-Benz C230 (W203, 2003–2005) 1.8L L4 Gasoline Kompressor / Sport Sedan
ABS Wheel Speed Sensor
1. ABS Wheel Speed Sensor Failure
Fault Codes:
Fault codes C1010 and C1020 indicate wheel speed sensor issues, with variations depending on the specific wheel affected.
Why it happens:
ABS wheel speed sensor failure occurs due to dirt or debris accumulation, wiring damage, or sensor wear and tear from prolonged use or harsh driving conditions.
Symptoms:
Illuminated ABS warning light, signaling an issue with the sensor or system.
Loss of ABS functionality, resulting in wheel lockup during sudden braking.
Unresponsive traction control system, as it relies on accurate wheel speed data.
Inconsistent or incorrect speedometer readings, caused by faulty sensor signals.
Unusual noises during braking, stemming from improper ABS operation.
Parts to Replace
Front 2035400417 is a reliable replacement part designed to ensure accurate wheel speed data for the ABS system, enhancing braking performance and safety.
Rear Passenger Side 2035401417 is a reliable replacement part designed to ensure accurate wheel speed data for the ABS system, enhancing braking performance and safety.
Rear Driver Side 2035401317 is a reliable replacement part designed to ensure accurate wheel speed data for the ABS system, enhancing braking performance and safety.
Fault code P0571 (Brake Switch A Circuit) signals a brake switch circuit malfunction, often due to a defective brake light switch, wiring problems, or faulty connectors.
Why it happens:
Brake light switch failure typically occurs due to worn-out internal components, electrical faults, or damage caused by prolonged use and exposure to debris or moisture.
Symptoms:
Brake lights not functioning properly, either staying on continuously or not turning on at all.
ABS or Traction Control warning lights illuminating on the dashboard due to miscommunication with the system.
Shift interlock issues, where the gear selector won't move out of park as the system can't detect the brake pedal being pressed.
Cruise control malfunction, as the switch is essential for disengaging the system when the brakes are applied.
Rear multilink suspension wear happens due to prolonged exposure to harsh road conditions, heavy loads, or lack of maintenance causing bushings, joints, and links to degrade over time.
Symptoms:
Excessive vibrations or discomfort, especially when driving over uneven surfaces.
Clunking or knocking noises from the rear of the vehicle, caused by worn-out bushings or joints.
Uneven tire wear, indicating misalignment or instability in the suspension system.
Poor handling and reduced stability, particularly during turns or braking.
Sagging or reduced ride height, often a result of weakened suspension components.
P0335 indicates a malfunction in the crankshaft position sensor "A" circuit, which disrupts the engine's ability to monitor crankshaft position and speed, often leading to performance issues like stalling or rough idling.
Why it happens:
Crankshaft position sensor failure typically occurs due to heat damage, electrical issues, or physical wear, which disrupts its ability to accurately monitor the crankshaft's position and speed.
Symptoms:
Difficulty Starting: The engine may crank but struggle to start or fail to start altogether.
Stalling: The engine might stall unexpectedly, especially at low speeds or idle.
Poor Acceleration: Sluggish or hesitant acceleration due to incorrect timing signals.
Engine Misfires: Irregular firing of cylinders, leading to rough idling or reduced performance.
Check Engine Light: The dashboard may display a warning light triggered by related fault codes.
Reduced Fuel Efficiency: Incorrect timing can lead to inefficient fuel consumption.
Bosch 0261210170 is a high-quality OEM replacement part designed to monitor the crankshaft's position and rotational speed for optimal engine performance.
Power steering pump failure typically occurs due to wear and tear from prolonged use, fluid contamination, low fluid levels, or overheating caused by demanding driving conditions.
Symptoms:
Difficulty steering, especially at low speeds, due to reduced hydraulic pressure.
Whining or groaning noises when turning the steering wheel, caused by a failing pump.
Stiff or unresponsive steering, making it harder to control the vehicle.
Fluid leaks, often visible around the pump or beneath the vehicle, leading to reduced fluid levels.
Foamy or discolored power steering fluid, indicating air or contamination in the system.
Tie rod end wear typically occurs due to constant steering movement, exposure to road debris, water, or salt, and aging of the ball joint or rubber components.
Symptoms:
Loose or unresponsive steering, making the vehicle harder to control.
Clunking or knocking noises when turning the steering wheel, due to play in the worn tie rod end.
Uneven tire wear, caused by misalignment resulting from a damaged tie rod end.
Steering wheel vibration, especially at higher speeds, as the worn tie rod end fails to maintain stability.
Difficulty maintaining alignment, requiring frequent realignment of the wheels.
Parts to Replace
Front Inner 2303380015 is a high-quality component designed to ensure precise steering and alignment.
Front Driver Side Outer 2033303903 is a high-quality steering component designed to ensure precise alignment and smooth steering performance.
Front Passenger Side Outer 2033304003 The steering tie rod end is a vital component of your steering system, enabling the wheels to turn by transmitting power from your steering link or rack gear to your steering knuckle.
Power steering control valve failure occurs due to wear from prolonged use, contamination by debris or fluid impurities, or excessive pressure causing internal damage.
Symptoms:
Difficulty steering, especially during slow maneuvers, due to compromised fluid flow or pressure.
Jerky or uneven steering response, indicating improper control valve function.
Whining or groaning noises, caused by fluid restriction or internal damage to the valve.
Fluid leaks, often near the control valve, reducing system efficiency.
Steering feel inconsistencies, such as sudden light or heavy steering, signaling valve irregularities.
P0410 indicates a malfunction in the secondary air injection system, P0171 signals a lean air/fuel mixture in Bank 1, and P0300 points to random or multiple engine misfires, often caused by ignition or fuel system issues.
Why it happens:
Manifold Absolute Pressure Sensor failure typically occurs due to excessive heat, contamination, or mechanical wear, which disrupts its ability to regulate boost pressure effectively.
Symptoms:
Loss of Boost: Reduced or no boost pressure, leading to a noticeable drop in engine performance.
Poor Acceleration: Sluggish response when accelerating, especially under load.
Whistling or Hissing Noises: Unusual sounds from the engine bay, indicating air leaks or bypass valve issues.
Check Engine Light: The dashboard may display a warning light due to related fault codes.
Erratic Idle: Fluctuating or rough idle caused by improper air regulation.
P0010 highlights an intake camshaft actuator circuit issue (Bank 1), P0011 signals over-advanced timing (Bank 1), and P0020 points to an intake camshaft actuator circuit problem (Bank 2).
Why it happens:
Camshaft adjuster magnet failure typically occurs due to electrical faults, contamination, or mechanical wear, disrupting its ability to regulate camshaft timing effectively.
Symptoms:
Rough Idle: The engine may vibrate or shake when idling, indicating improper valve timing.
Loss of Power: Reduced engine performance, especially during acceleration.
Check Engine Light: The dashboard warning light may illuminate due to timing irregularities.
Unusual Engine Noises: Clicking or knocking sounds from the engine bay.
Reduced Fuel Efficiency: Inefficient valve timing can lead to higher fuel consumption.
P0100 indicates a malfunction in the Mass Air Flow (MAF) sensor circuit, while P0101 signals a performance issue in the MAF sensor's range or functionality.
Why it happens:
Mass Air Flow (MAF) sensor failure often occurs due to contamination, electrical faults, or mechanical damage, disrupting its ability to measure air intake accurately.
Symptoms:
Check Engine Light: The dashboard warning light may illuminate due to incorrect air intake readings.
Poor Acceleration: Sluggish or hesitant acceleration caused by an imbalanced air-fuel mixture.
Engine Stalling: The engine may stall or die when idling or coming to a stop.
Rough Idling: The engine may vibrate or run unevenly while idling.
Reduced Fuel Efficiency: Inefficient combustion leads to higher fuel consumption.
Black Smoke from Exhaust: Excessive fuel in the mixture can result in black smoke emissions.
Parts to Replace
Hella 009142351 is a high-quality replacement part designed to ensure accurate air intake measurement for optimal engine performance.
P0171 signals a lean mixture, P0172 a rich mixture, P0300 random misfires, and P0301–P0304 specific misfires in cylinders 1–4.
Why it happens:
An intake manifold gasket leak typically occurs due to age-related wear, heat exposure, or improper installation, leading to a compromised seal between the manifold and cylinder head.
Symptoms:
Engine Misfires: Irregular combustion due to air or coolant entering the cylinders.
Rough Idle: The engine may vibrate or run unevenly while idling.
Coolant Leaks: Visible coolant leakage around the intake manifold area.
Overheating: The engine may overheat due to coolant loss or improper circulation.
Check Engine Light: A warning light may illuminate due to air-fuel mixture imbalances.
White Smoke from Exhaust: Excessive white smoke, indicating coolant entering the combustion chamber.
P0128 indicates that the engine coolant temperature is below the thermostat's regulating range, often due to a stuck-open thermostat or low coolant levels.
Why it happens:
Thermostat failure often occurs due to wear and tear, contamination, or electrical faults, which prevent it from regulating coolant flow effectively.
Symptoms:
Overheating Engine: The engine may overheat due to restricted coolant flow.
Trouble Reaching Operating Temperature: The engine struggles to warm up or maintain optimal temperature.
Temperature Fluctuations: Irregular temperature readings on the gauge.
Coolant Leaks: Visible leakage around the thermostat housing.
Heater Malfunction: The cabin heater may fail to produce warm air.
Unusual Noises: Knocking or gurgling sounds from the engine bay.
Parts to Replace
Thermostat (90C) 2712000015 is a high-quality replacement part designed to regulate engine temperature effectively. It is compatible with various Mercedes-Benz models.
Thermostat (90C) 2712030575 is a high-quality replacement part designed to regulate engine temperature effectively.
Engine mount deterioration often occurs due to exposure to heat, oil leaks, vibrations, or simply aging, which cause the rubber components to degrade and lose their ability to absorb shocks effectively.
Symptoms:
Excessive vibrations felt inside the cabin, especially during idle or acceleration.
Clunking or banging noises, particularly when changing gears or going over bumps.
Misaligned engine position, visible as the engine sitting unevenly or sagging.
Reduced performance, with the engine struggling to stay stable during operation.
Fault codes P0170 and P0171 indicate fuel trim issues: P0170 reflects a malfunction in the fuel adjustment system, while P0171 signals that the engine is running lean due to insufficient fuel in Bank 1.
Why it happens:
PCV valve failure typically occurs due to clogging from oil sludge or debris, wear over time, or damage from excessive pressure in the crankcase.
Symptoms:
Increased oil consumption or visible oil leaks.
Rough engine idle or misfiring due to disrupted air-fuel ratio.
Check engine light activation, often linked to diagnostic trouble codes.
Whistling or hissing noises, as a result of air leaks around the valve.
Reduced engine performance or hesitation during acceleration.
Excessive smoke from the exhaust, caused by crankcase gases escaping improperly.
Parts to Replace
Valve Cover to Intake Manifold 2710160881 is designed to connect the valve cover to the intake manifold, ensuring proper crankcase ventilation and reducing hydrocarbon emissions.
Valve Cover to Intake Manifold 2710160481 The Genuine Mercedes-Benz Engine Crankcase Breather Hose is a top-quality replacement part designed to keep your Mercedes-Benz running smoothly.
Fault codes P0130, P0133, and P0150 point to issues with the oxygen sensor circuit: P0130 indicates a malfunction in Bank 1 Sensor 1, P0133 suggests slow response in the same sensor, and P0150 highlights a fault in Bank 2 Sensor 1.
Why it happens:
Oxygen sensor failure typically happens due to contamination from fuel additives, carbon buildup, or prolonged exposure to extreme temperatures and exhaust gases.
Symptoms:
Poor fuel economy due to incorrect air-fuel ratio adjustments.
Engine misfires or rough idling caused by inaccurate readings.
Check engine light activation, often accompanied by fault codes like P0130 or P0133.
Decreased engine performance, with sluggish acceleration or hesitation.
Higher emissions, sometimes leading to a failed emissions test.
Fault codes P0190, P0172, and P0175 indicate fuel system issues: a faulty fuel rail pressure sensor and rich conditions in both engine banks.
Why it happens:
Fuel pressure regulator failure often occurs due to prolonged exposure to contaminants, wear and tear, or excessive fuel pressure damaging its internal components.
Symptoms:
Difficulty starting the engine or complete failure to start.
Reduced fuel efficiency due to improper fuel delivery.
Engine misfires or rough idling caused by inconsistent fuel pressure.
Fuel leaks near the regulator.
Strong fuel smell, especially around the engine bay.
Loss of engine power or hesitation during acceleration.
High Intensity Discharge (HID) Headlight Control Module
1. Headlight Control Module Failure
Fault Codes:
Fault codes B1015, B1487, and B1490 indicate issues with headlamp communication, circuit grounding, and module malfunction.
Why it happens:
Headlight control module failure typically occurs due to electrical faults, moisture intrusion, or overheating that damages the internal circuitry.
Symptoms:
Non-functional or flickering headlights, as the module fails to regulate power.
Error messages or warnings displayed on the dashboard related to headlamp systems.
Inconsistent headlight adjustments, such as improper leveling or range movement.
Inoperative high beams or low beams, caused by faulty module communication.
Unusual electrical behavior, like sudden activation or deactivation of headlights.
Parts to Replace
This Genuine Mercedes-Benz High Intensity Discharge (HID) Headlight Control Module, part number 2038202426 / 203 820 24 26, is an essential component for your Mercedes-Benz headlight system.
Fault codes P0562, P2503, P0620, and B1800 indicate electrical system issues: low voltage in the system and charging, a generator control circuit problem, and an alternator communication error.
Why it happens:
Alternator failure often results from worn-out bearings, damaged diodes, or overheating caused by excessive electrical loads or inadequate cooling.
Symptoms:
Dimming or flickering lights, as the alternator struggles to supply power.
Warning indicators on the dashboard, such as a battery or charging system light.
Dead battery, caused by inadequate charging from the alternator.
Difficulty starting the engine or frequent stalling during operation.
Unusual noises, like whining or grinding, from worn-out alternator components.
Electrical malfunctions, such as inconsistent power to accessories or devices.
Parts to Replace
Bosch AL0810X is a high-quality remanufactured component designed to efficiently charge the battery and power the vehicle's electrical systems.
Alternator AL0810N is a premium OEM component designed to efficiently charge the battery and power the vehicle's electrical systems.
Fault codes P0611 and B1000 highlight starter system issues: P0611 is a control circuit malfunction, B1000 signals an internal SAM or ECU fault, while no crank codes suggest mechanical failure.
Why it happens:
Starter motor failure is often caused by worn-out brushes, a faulty solenoid, electrical issues, or mechanical wear from prolonged use.
Symptoms:
Clicking or grinding sounds when trying to start the engine, indicating mechanical wear or a faulty solenoid.
Engine failing to crank, even though the battery is charged.
Intermittent starting issues, where the motor works sporadically.
Electrical issues, such as dimming lights when attempting to start the vehicle.
Burning smell from the starter area, caused by overheating or electrical faults.
Fault codes P0715 and P0720 indicate issues with the input/turbine speed sensor and output speed sensor, respectively, while P0700 signals a transmission control system malfunction.
Why it happens:
Transmission conductor plate failure typically occurs due to electrical faults, fluid contamination, or wear and tear affecting the plate's sensors and circuits.
Symptoms:
Erratic shifting or transmission slipping, due to faulty speed or pressure sensors.
Limp mode activation, where the vehicle restricts gear use to protect the transmission.
Delayed gear engagement, especially when shifting from park to drive or reverse.
Illuminated check engine or transmission warning light, often linked to specific diagnostic trouble codes (DTCs).
Harsh or unexpected shifting, caused by inaccurate sensor signals.
Mercedes Conductor Plate 10020951 The OEM Automatic Transmission Conductor Plate part number 10 0209 51 is a high-quality replacement part for your Mercedes-Benz vehicle.
Fault codes P0750 and P0755 indicate malfunctions in shift solenoids A and B, while P2767 and P0715 point to issues with the input/turbine speed sensor, such as no signal or circuit malfunction.
Why it happens:
Transmission shift solenoid issues occur due to electrical faults, fluid contamination, or mechanical wear affecting the solenoid's ability to regulate fluid flow for smooth shifting.
Symptoms:
Delayed or erratic shifting, where gears take longer to engage or shift unexpectedly.
Transmission slipping, causing loss of power during acceleration.
Limp mode activation, restricting gear usage to protect the transmission.
Unusual noises, such as buzzing or clunking during gear changes.
Illuminated check engine or transmission warning light, often accompanied by related diagnostic trouble codes.
Parts to Replace
Mercedes Solenoid Valve 2402701700 The Genuine Mercedes-Benz Automatic Transmission Control Solenoid is a high-quality replacement part that is specifically designed for Mercedes-Benz vehicles.
Fault code B1101 indicates a washer pump circuit open or short to ground, often diagnosed via the body control module (SAM) or through visual inspection, as it lacks OBD-II powertrain codes.
Why it happens:
Windshield washer pump failure typically occurs due to electrical issues, clogged nozzles, or motor damage caused by wear, debris, or insufficient fluid.
Symptoms:
No fluid spray when activating the washer system, often due to a malfunctioning pump or clogged nozzles.
Weak or inconsistent spray, indicating partial pump failure or debris in the system.
Unusual noises, such as humming or grinding, from the pump area.
Dashboard warning lights, related to the washer system or fluid levels.
Leaks near the washer reservoir, caused by damaged pump seals or connections.
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 C230 Kompressor reliable for long-term use?⌄
Yes, when maintained with regular oil changes and quality parts, the C230 Kompressor delivers dependable performance and solid longevity typical of Mercedes engineering.
What are common issues with the Mercedes-Benz C230 Kompressor?⌄
Owners often report issues like supercharger clutch wear, window regulator failures, or minor electrical glitches. Replacing worn parts with OEM components helps prevent recurring problems.
How often should I service my C230 Kompressor? ⌄
Routine maintenance every 10,000 miles or annually is ideal. Keep up with oil changes, belt inspections, and air filter replacements to maintain performance and efficiency.
Are parts for the C230 Kompressor expensive or hard to find?⌄
Not at all. eEuroparts.com provides OEM and performance-grade parts for this model, making it easy to find reliable replacements without overspending.
Is the C230 Kompressor a good sporty sedan for everyday driving? ⌄
Absolutely. It offers a perfect mix of sportiness and comfort, with responsive handling and strong acceleration, ideal for drivers who enjoy a balance of performance and practicality.
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