🏷️ Basic Information Identification Make: Mercedes-Benz Model: C320 Year: 2003 Generation Chassis Code: W203 Codes Engine Code Variant: M112.954 (3.2L V6) 👋 Introduction Market Position Segment: Compact Executive Sedan (W203 Generation) Target Audience: Owners seeking DIY repairs, independent repair shops, certified Mercedes-Benz technicians. Competitive Analysis Competitors: BMW 3 Series (E46), Audi A4 (B6), Lexus IS300, Acura TL Key Features Premium Appointments: High-quality interior materials, advanced safety features, refined ride comfort. Powertrain: Smooth and potent 3.2L V6 engine paired with a responsive 5-speed automatic transmission. Engineering: Mercedes-Benz engineering hallmarks: safety, durability, and performance. 📋 Manual Details Coverage Areas Primary Coverage: Service and Repair Language: English Format Type: Software (likely PDF or proprietary viewer) Page Count Estimated Pages: 1500+ Manual Type Type: Official Service and Repair Manual 📖 Manual Coverage Systems Covered Engine: M112.954 V6 Engine (3.2L) - Maintenance, Diagnostics, Repair, Overhaul Transmission: 5G-TRONIC Automatic Transmission (722.6) - Operation, Maintenance, Diagnostics, Repair Drivetrain: Rear-Wheel Drive (RWD) System, Driveshafts, Differential Suspension: Front and Rear Suspension Systems (MacPherson Strut Front, Multi-Link Rear), Shock Absorbers, Springs, Bushings Brakes: Front and Rear Disc Brakes, ABS (Anti-lock Braking System), ESP (Electronic Stability Program), Brake Fluid Specifications, Bleeding Procedures Steering: Power Steering System, Steering Column, Wheel Alignment Specifications Electrical System: Battery, Charging System, Starter, Ignition System, Lighting, Fuses, Relays, Wiring Diagrams Engine Management: ME 2.8 Engine Control Module (ECM), Fuel Injection, Ignition Timing, Sensors (MAP, MAF, O2, Crankshaft, Camshaft), Emission Controls Climate Control: Automatic Climate Control (AAC), HVAC System Components, Refrigerant Handling, Diagnostics Body And Interior: Body Panels, Doors, Hood, Trunk, Bumpers, Interior Trim, Seats, Airbags Safety Systems: Airbag System (SRS), Seatbelt Pretensioners, Crash Sensor Diagnostics Comfort And Convenience: Power Windows, Power Locks, Remote Keyless Entry, Sunroof Operation Procedures Included Maintenance: Oil Changes, Filter Replacements, Spark Plug Replacement, Fluid Flushes (Coolant, Brake, Transmission), Belt Replacement Troubleshooting: Diagnostic Trouble Codes (DTCs), Symptom-Based Diagnostics, Component Testing Repair: Engine Component Replacement (Alternator, Starter, Water Pump, Ignition Coils), Transmission Service, Brake Pad/Rotor Replacement, Suspension Component Replacement, Electrical Component Diagnosis and Replacement Rebuilds: Engine and Transmission Overhaul Procedures Calibration: Steering Angle Sensor Calibration, Electronic Throttle Body Adaptation Technical Depth Depth: Comprehensive: From routine maintenance to advanced diagnostics and complete mechanical and electrical system overhauls. Diagnostics: In-depth diagnostic procedures using OBD-II scanners, including specific Mercedes-Benz diagnostic codes and strategies. Wiring Diagrams: Detailed electrical wiring schematics for all major systems, crucial for electrical troubleshooting. Torque Specifications: Precise torque values for all critical fasteners, ensuring proper assembly and preventing component damage. Special Tools: Identification and usage of specialized tools required for specific repair procedures. 📊 Manual Specifications File Format Primary Format: Software (likely PDF or executable) Searchability: Searchable text content for quick access to information. Print Quality: High-resolution images, diagrams, and text for clear reproduction if printing. Print Quality Illustration Quality: High-quality, detailed illustrations and diagrams. Binding Type Binding: N/A (Software) Paper Type Paper Type: N/A (Software) ⚙️ Engine Specifications Primary Engine Engine Type: V6, SOHC (later M112 variants often had 3 valves per cylinder, but the core M112 is 2 valves per cylinder, though some sources might list 3 for specific implementations) Displacement: 3.2 Liters (3199 cc) Bore X Stroke: 89.9 mm x 84.0 mm Compression Ratio: 10.0:1 Valvetrain: Single Overhead Camshafts (SOHC) per bank, 2 valves per cylinder (typical for M112.954 variant) Performance Horsepower: 215 hp @ 5750 rpm Torque: 229 lb-ft @ 3000-4500 rpm Fuel System Fuel Delivery: Electronic Fuel Injection (Sequential Multi-Point) Fuel Type: Premium Unleaded Gasoline (91 Octane Recommended) Ignition System: Distributorless Electronic Ignition (Two spark plugs per cylinder) Cooling System Coolant Type: Mercedes-Benz approved G48 (Ethylene Glycol based) or equivalent 🔧 Transmission Standard Type: 5-Speed Automatic (722.6) Shift Modes: Comfort (C) and Sport (S) modes Optional Type: N/A for C320 Sedan in 2003 Features Transmission Fluid Type: Mercedes-Benz 236.14 (or equivalent specified by manufacturer, often ATF LT 71141) 📐 Dimensions Exterior Length: 177.8 inches (4516 mm) Width: 68.9 inches (1750 mm) Height: 55.7 inches (1415 mm) Wheelbase: 106.7 inches (2710 mm) Weights Curb Weight: Approximately 3362 - 3439 lbs (1525 - 1560 kg) Cargo Trunk Volume: 12.4 cubic feet (351 liters) 🛡️ Safety Features Ratings NHTSA Front Impact: 5 Stars (Driver and Passenger) NHTSA Side Impact: 4 Stars (Front and Rear Passengers) Active Features ABS: Standard Anti-lock Braking System Esp: Standard Electronic Stability Program Traction Control: Standard Acceleration Slip Regulation (ASR) Passive Features Airbags: Front Dual Stage Airbags, Front Side Airbags, Window Airbags (Standard) Seatbelts: Front 3-Point Active Seatbelts with Pretensioners and Force Limiters 💡 Technology Features Infotainment Audio System: Optional COMAND (Cockpit Management and Navigation) system with CD player, optional GPS navigation, and radio. Driver Assistance Parking Assist: Optional Parktronic parking sensors. Connectivity Phone Integration: Optional integrated Bluetooth phone system (requires compatible phone cradle). 🔧 Maintenance Service Intervals Oil Change Interval: Approximately every 10,000 miles (16,000 km) or 12 months, based on 'flexible' service intervals (Assyst system). Major Service...