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2003 MERCEDES-BENZ C230 CAR/TRUCK REPAIR PROCEDURES AND DIAGRAMS - WHAT MERCEDES-BENZ REPAIR SHOPS DON'T WANT YOU TO KNOW
Learn how to repair a car or truck, install or remove parts, wire an engine, reset warning lights, replace fuel filter, fix auto body and more. Get Automotix DIY!Select Section
- Component Locations
- Wiring Diagrams
- Technical Service Bulletins
- Specifications
- A/C & Heater Service
- Brake Service
- Fuel Filter Replacement
- Driveline, U-Joint & CV Axles Replacement
- Starter & Alternator Replacement
- Cabin Air Filter Locations & Replacement
- Maintenance Lamp Reset
- Radiator & Hose Replacement
- Serpentine Belt Service

A/C & HEATER SERVICE PROCEDURES FOR 2003 MERCEDES-BENZ C230 AUTOMOBILES
Mercedes-Benz -> Electric Cooling Fans -> Component Replacement -> E55 AMG, E320 & E500 -> Electric Cooling Fan, Replace -> ML55 AMG, ML350 & ML500 -> SL55 AMG, SL500 & SL600
Vehicle: 2003 MERCEDES-BENZ C230 1.8 L4 GAS
Electric Cooling Fan, Replace
E55 AMG, E320 & E500
- Remove clips and protective grate, Fig. .
- Remove clips and cover.
- Disconnect connector.
- Remove clips and bolts, then the upper crossmember.
- Remove engine hood control cable.
- Remove mounting bolts and hang brace with horn.
- Remove mounting bolts and auxiliary fan.
- Remove clips and fan shroud.
- Remove mounting bolts and fan motor from carrier element.
- Reverse procedure to install. Torque upper frame crossmember and brace mounting bolts to 62-115 inch...
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BRAKE SERVICE PROCEDURES FOR 2003 MERCEDES-BENZ C230 AUTOMOBILES
Hydraulic Brake Systems -> Precautions -> Battery Ground Cable
Vehicle: 2003 MERCEDES-BENZ C230 1.8 L4 GAS
Battery Ground Cable
Prior to service, dis...
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FUEL FILTER REPLACEMENT PROCEDURES FOR 2003 MERCEDES-BENZ C230 AUTOMOBILES
Mercedes-Benz -> Fuel Filter Replacement -> Except 2003-06 E320 & E500 Sedans Less 4 Matic & 2004-06 E Series w/Gasoline Engines -> Fuel System Pressure Relief -> Removal & Installation
Vehicle: 2003 MERCEDES-BENZ C230 1.8 L4 GAS
Fuel System Pressure Relief
Do not smoke or allow an open flame of any type when working on or near any fuel system related components. The highly flammable vapor mixtures may ignite, resulting in serious personal injury.
Prior to disconnecting fuel lines, the fuel system pressure must be relieved to prevent accidental fuel spray.
After the battery has been disconnected and reconnected, some abnormal driveability symptoms may occur. The vehicle may need to be driven while it relearns its adaptive strategy.
- Ensure t...
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DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES FOR 2003 MERCEDES-BENZ C230 AUTOMOBILES
DRIVESHAFT, Replace
Vehicle: 2003 MERCEDES-BENZ C230 1.8 L4 GAS
Lethal injuries are possible if vehicle slips off of lifting platform. Align vehicle between the columns of the lifting platform and position the four support plates at the lifting platform support points specified by the vehicle manufacturer.
- Raise vehicle.
- Remove exhaust system at flange connection.
- Remove exhaust shielding plate.
- Remove bottom part of noise encapsulation.
- Remove rear engine crossmember and rear engine mount.
- Unscrew crossmember at floor shift.
- Detach front reinforcement brace below propeller shaft.
- Slacken bolts of propeller shaft intermediate bearing.
- Disconnect ...
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STARTER & ALTERNATOR REPLACEMENT PROCEDURES FOR 2003 MERCEDES-BENZ C230 AUTOMOBILES
Starter, Replace
Vehicle: 2003 MERCEDES-BENZ C230 1.8 L4 GAS
- Disconnect electrical connectors.
- Remove mounting bolts, then the cable and hose brackets...
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CABIN AIR FILTER LOCATIONS & REPLACEMENT PROCEDURES FOR 2003 MERCEDES-BENZ C230 AUTOMOBILES
Cabin Air Filter Service -> Mercedes-Benz -> 2002-07 C & 2002-09 CLK Class
Vehicle: 2003 MERCEDES-BENZ C230 1.8 L4 GAS
On 2002-05 models, under normal operating conditions the cabin air filter should be replaced every 15,000 miles. In dusty areas change the cabin air filter more often.
On 2006-08 models except AMG, under normal operating conditions the cabin air filter should be replaced every 24 months or 26,000 miles. In dusty areas change the cabin air filter more often.
On 2009 models except AMG, under normal operating conditions the cabin air filter should be replaced every 24 months or 20,000 miles. In dusty areas change the cabin air filter more often.
On 2006-09 AMG mo...
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MAINTENANCE LAMP RESET PROCEDURES FOR 2003 MERCEDES-BENZ C230 AUTOMOBILES
Mercedes-Benz -> Check Engine Oil Level ->
Vehicle: 2003 MERCEDES-BENZ C230 1.8 L4 GAS
A sensor mounted in the engine oil pan allows engine oil level to be displayed on the instrument panel trip odometer window. With the vehicle parked on a level surface, engine warmed up and shut off for 5 minutes, place ignition switch in the On position. An oil level icon along with a clock icon should appear in the trip odometer window. Press the knob to the left of the speedometer twice. The message OK, 1.0 qt., 1.5 qt., 2.0 qts., or...
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RADIATOR & HOSE REPLACEMENT PROCEDURES FOR 2003 MERCEDES-BENZ C230 AUTOMOBILES
Radiator, Replace
Vehicle: 2003 MERCEDES-BENZ C230 1.8 L4 GAS
- Drain cooling system into suitable container.
- Remove fan shroud.
- On models equipped with automatic transmission,remove ATF cooler lines.
- Remove upper frame crossmember, protective blower grille and air defl...
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SERPENTINE BELT SERVICE PROCEDURES FOR 2003 MERCEDES-BENZ C230 AUTOMOBILES
Serpentine Drive Belt, Replace
Vehicle: 2003 MERCEDES-BENZ C230 1.8 L4 GAS
- Open engine hood.
- Remove hose from silencer.
- Remove two bolts securing charge air hose to silencer.
- Remove wide band silencer.
- Loosen Torx bolt from belt tensioner pulley.
- Rotate or lift belt tensioner arm countercl...
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COMPONENT LOCATION DIAGRAMS FOR 2003 MERCEDES-BENZ C230 AUTOMOBILES
Component location diagrams for most 2003 MERCEDES-BENZ C230 cars and light trucks sold in the U.S. from 1990+.
![]() Components on diagram: |
![]() Components on diagram: |
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WIRING DIAGRAMS FOR 2003 MERCEDES-BENZ C230 AUTOMOBILES
OEM drawn wiring diagrams for most 2003 MERCEDES-BENZ C230 cars and light trucks sold in the U.S.
![]() Components on diagram: |
![]() Components on diagram: |
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TECHNICAL SERVICE BULLETINS FOR 2003 MERCEDES-BENZ C230 AUTOMOBILES
OEM TSB listings for most 2003 MERCEDES-BENZ C230 cars and light trucks sold in the U.S. from 1985+.
Document: Re-code the Software Calibration Number (SCN) Vehicle: 2003 MERCEDES-BENZ C230 1.8 L4 GAS Auto Systems: |
Document: Maintenance Systems Overview Vehicle: 2003 MERCEDES-BENZ C230 1.8 L4 GAS Auto Systems: |
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COMPONENT/PARTS SPECIFICATIONS FOR 2003 MERCEDES-BENZ C230 AUTOMOBILES
BRAKE SPECIFICATIONS: Brake drum, rotor, caliper, and related specifications for most 2003 MERCEDES-BENZ C230 cars and light trucks sold in the U.S. and Canada from 1970+.
- Brake caliper mounting bolt torque
- Brake drum runout, machining, & discard specs
- Minimum brake lining thickness.
- Brake rotor runout, parallelism, machining, discard, & finish specs
A/C SYSTEM SPECIFICATIONS: Air conditioning refrigerant capacity and type as well as lubricant capacity for most 2003 MERCEDES-BENZ C230 cars and light trucks sold in the U.S. and Canada from 1980+.
- Refrigerant capacity & type, compressor oil viscosity, total system oil capacity & compressor clutch gap
COOLING SYSTEM BLEED: Cooling system bleeder valve identification, bleeder type and bleed procedures for most domestic and imported cars and light trucks sold in the U.S. and Canada from 1986+.
PREVENTIVE MAINTENANCE: Preventive maintenance recommendations and required services for most domestic and imported cars and light trucks sold in the U.S. and Canada from 1980+. Includes severe and routine service schedules
QUICK-LUBE and ILLUSTRATIONS: Fluid recommendations, capacities, drain plug torques, tire data, and severe service recommended preventive maintenance schedules. Information covers most 2003 MERCEDES-BENZ C230 cars and light trucks sold in the U.S. and Canada from 1980+. Engine and chassis service images.
- Automatic transmission/transaxles capacities, lubricant recommendations
- Differential/final drive capacities, lube recommendations, grades, & viscosities
- Final drive fill & drain plug torques
- Number of lubrication fittings & plugs
- Power steering, brake, & clutch fluid recommendations
- Manual transmission/transaxle capacities, lube recommendations, grades, & viscosities
- Number of lubrication fittings & plugs
- Power steering, brake, & clutch fluid recommendations
- Engine oil capacities, API grade recommendations, SAE viscosity recommendations, drain plug torque
- Severe service maintenance & interval recommendations
- Tire sizes, wheel nut/bolt torque, pressures & rim sizes
- Transfer case capacities, lube recommendations, grades, & viscosities
TUNE-UP & DRIVEABILITY SPECIFICATIONS: Most tune-up specifications for most 2003 MERCEDES-BENZ C230 cars and light trucks sold in the U.S. and Canada from 1980+
- Airflow sensor electrical specifications
- Tensioning specifications for systems with automatic tensioners
- Barometric pressure sensor specs
- Battery group number and cranking performance
- Crankshaft & camshaft position sensor resistance
- Engine compression pressures
- Coolant temperature sensor specs
- Computer advance.
- Diesel fuel temperature sensor resistance.
- Distributor advance specifications
- Ignition pickup coil resistance
- Exhaust gas recirculation temperature sensor resistance
- Engine fastener torque values
- Firing order diagrams
- Fuel system pressures
- Generator (alternator) specs
- Intake air temperature sensor specs
- Ignition coil specifications
- Fuel injector resistance
- Engine idle speeds
- Knock sensor resistance
- Manifold absolute pressure sensor specs
- Mixture control solenoid resistance
- Voltage regulator specs
- Spark plug applications & gaps
- Starter motor electrical specs.
- Tensioning specifications for systems without automatic tensioners
- Throttle body temperature sensor resistance
- Ignition timing in degrees at rpm
- Transmission oil temperature sensor resistance
- Throttle position sensor specs
- Vacuum sensor valve specs
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