Model Years:
2001, 2002, 2003, 2004, 2005, 2006
Regions Covered:
Global (primarily North American and European specifications)
Engine Variants Covered:
All gasoline (M111, M112, M271, M272) and diesel (OM646, OM647) engines
Body Styles Covered:
Sedan (W203), Wagon (S203), Coupe (CL203)
Type:
Factory-Level Repair Manual (often based on official workshop manuals)
Engine:
All gasoline and diesel engines (e.g., M111, M271, OM646, OM647)
Transmission:
Automatic (e.g., 722.6) and Manual transmissions
Brakes:
Hydraulic system, ABS, ESP, Parking brake
Suspension Steering:
Front and rear suspension, steering system, power steering
Electrical System:
12V system, battery, alternator, starter, lighting, ignition, body electricals
Powertrain Control:
Engine control modules (ECU), transmission control modules (TCU), emissions control
Comfort Systems:
HVAC (heating, ventilation, air conditioning), power windows, seats, mirrors
Body Interior:
Body panels, doors, hood, trunk, interior trim, airbags
Cooling System:
Radiator, thermostat, water pump, cooling fan, coolant hoses.
Exhaust System:
Catalytic converter, mufflers, exhaust pipes, oxygen sensors.
Safety Restraints:
Airbag system diagnostics and replacement, seatbelt mechanisms.
Troubleshooting:
Diagnostic trouble codes (DTCs) and procedures for identification and resolution
Routine Maintenance:
Oil changes, filter replacements, spark plugs, fluid checks, belt replacements
Engine Repair:
Engine overhaul, cylinder head service, piston/ring replacement, timing chain/belt service
Transmission Service:
Fluid and filter changes, clutch replacement (manual), torque converter service (automatic)
Brake System Repair:
Pad and rotor replacement, caliper service, brake fluid flush, ABS/ESP component replacement
Suspension Steering Repair:
Strut/shock absorber replacement, control arm service, ball joint replacement, tie rod end replacement, power steering pump/rack service
Electrical Diagnostics:
Wiring diagrams, component testing, module diagnostics, starter/alternator testing
HVAC Repair:
Refrigerant recharge, compressor replacement, blower motor service, heater core replacement
Body Work:
Panel alignment, door mechanism repair, glass replacement
Wheel Alignment:
Specifications and procedures for front and rear wheel alignment.
Tire Wheel Service:
Information on tire pressure monitoring, wheel bearing replacement, and lug bolt specifications.
Fuel System Repair:
Fuel pump replacement, fuel filter service, injector diagnostics.
Depth:
Comprehensive (from basic maintenance to complete engine and transmission overhauls)
Diagnostic Capability:
Advanced (includes guided troubleshooting and component-level diagnosis)
Special Tools:
References specific Mercedes-Benz special tools required for certain procedures
Electrical Schematics:
Detailed wiring diagrams for all major electrical systems.
Torque Specifications:
Comprehensive torque values for all fasteners and critical components.
Engine Options:
2.0L Inline-4 (M271), 2.6L V6 (M112), 3.2L V6 (M112), 3.5L V6 (M272 - later models), 2.7L Diesel Inline-5 (OM647), 2.2L Diesel Inline-4 (OM646)
Horsepower Range:
125 hp (C200 CDI) to 268 hp (C350)
Torque Range:
200 Nm (C200 CDI) to 350 Nm (C350)
Fuel Injection:
Sequential Multi-Point Fuel Injection (MPI) or Direct Injection (CGI on some models)
Fuel Type:
Unleaded Gasoline (Premium recommended), Diesel
ECU Type:
Bosch Motronic (specific variants depend on engine and year)
Oil Change Interval:
Typically every 10,000-15,000 miles or 1 year (varies with model and service indicator)
Major Service Interval:
Around 30,000, 60,000, 100,000 miles, including transmission fluid, coolant, brake fluid, spark plugs.
Engine Oil:
MB 229.5 (e.g., Mobil 1 0W-40, Castrol Syntec 0W-30) - specific grade varies by engine.
Transmission Fluid Auto:
MB 236.10 or MB 236.14 (e.g., Pentosin ATF1, Shell ATF 134) for 722.6 transmission.
Coolant:
MB 325.0 or MB 326.0 (e.g., Mercedes-Benz Coolant
Brake Fluid:
DOT 4 Plus (MB specification 331.0)
Common Problems:
Cracked plastic intake manifolds (M271), SAM module failures, blower motor resistor failures, premature control arm bushing wear, oil leaks from valve cover gasket/oil cooler seals, C-Module (CAN bus interface) issues.
Maintenance Tips:
Regularly check for oil leaks, monitor the "service due" indicator, use correct MB-spec fluids, inspect suspension components proactively.
