🏷️ Basic Information Identification Make: Mercedes-Benz Model: C-Class Model Generation: W203 Product Type: Repair Manual Codes Internal Code: MB-C203-RM-PDF 👋 Introduction Market Position Market Segment: Premium Compact Executive Sedan/Coupe/Wagon Competitive Analysis Key Competitors: BMW 3 Series (E46), Audi A4 (B6/B7), Lexus IS Series, Infiniti G35 Key Features Vehicle Strengths: Build quality, luxury interior, advanced technology for its era, comfortable ride, strong safety credentials Manual Utility: Empowers owners and independent mechanics with factory-level diagnostic and repair procedures 📋 Manual Details Coverage Areas 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) Page Count Estimated Pages: 1500+ Manual Type Type: Factory-Level Repair Manual (often based on official workshop manuals) Language Language: English Format Format: Digital (PDF) 📖 Manual Coverage Systems Covered 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. Diagnostics Troubleshooting: Diagnostic trouble codes (DTCs) and procedures for identification and resolution Procedures Included 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. Technical Depth 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. 📊 Manual Specifications File Format File Type: Portable Document Format (PDF) Searchability: Searchable text (allows quick lookup of keywords and topics) Print Quality Image Resolution: High-resolution images and diagrams for clear viewing and printing Printable Pages: Allows selective printing of specific pages or sections Binding Type Binding: N/A (Digital Format) Paper Type Paper Quality: N/A (Digital Format) ⚙️ Engine Specifications Primary Engine 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) Performance Horsepower Range: 125 hp (C200 CDI) to 268 hp (C350) Torque Range: 200 Nm (C200 CDI) to 350 Nm (C350) Fuel System Fuel Injection: Sequential Multi-Point Fuel Injection (MPI) or Direct Injection (CGI on some models) Fuel Type: Unleaded Gasoline (Premium recommended), Diesel Engine Management ECU Type: Bosch Motronic (specific variants depend on engine and year) 🔧 Transmission Standard Transmission Options: 5-speed Manual, 5-speed Automatic (722.6 - NAG1), 7-speed Automatic (722.9 - NAG2 on later models) Optional Optional Transmissions: 7-speed Automatic transmission on select models Features Automatic Features: Touchshift (manual shifting capability), Comfort/Sport modes 📐 Dimensions Exterior Body Styles: Sedan (W203), Wagon (S203), Coupe (CL203) - Sportcoupe/C-Sportcoupe Wheelbase Sedan: 2715 mm (106.9 in) Length Sedan: 4526 mm (178.2 in) Weights Curb Weight Range: 1450 kg (3197 lbs) to 1650 kg (3638 lbs) depending on configuration 🛡️ Safety Features Ratings NHTSA Ratings: Generally high ratings, including 5-star front and side impact for the sedan in its time. Active Features Active Safety: Anti-lock Braking System (ABS), Electronic Stability Program (ESP), Traction Control System (ASR) Passive Features Passive Safety: Front airbags, side airbags, window airbags, pre-tensioning seatbelts, crumple zones 💡 Technology Features Infotainment Audio System: Optional COMAND (Cockpit Management and Navigation) system, Audio 20, Audio 50 APS Navigation: DVD-based navigation available on COMAND systems. Driver Assistance Optional Features: Bi-Xenon Headlights, Parktronic (parking sensors), Rain-sensing wipers, Cruise control Connectivity Phone Integration: Optional integrated Bluetooth phone module (UHI) 🔧 Maintenance Service Intervals Oil Change Interval: Typically every 10,000-15,000 miles or 1 year...