CD player, AM/FM radio, optional CD changer, optional Harman Kardon sound system.
Driver Assistance
Cruise Control:
Standard cruise control, optional DISTRONIC (adaptive cruise control) on some models.
Parking Assistance:
Optional PARKTRONIC parking sensors (front and rear)
Lighting:
Standard halogen headlights, optional Bi-Xenon headlamps with cornering illumination.
Connectivity
Bluetooth:
Optional Bluetooth hands-free communication system (often integrated with COMAND or Audio systems).
Telematics:
Optional Mercedes-Benz Tele Aid system for emergency assistance.
🔧 Maintenance
Service Intervals
Oil Change Interval:
Variable depending on driving conditions, typically every 10,000 miles or 1 year, indicated by the 'Service A' or 'Service B' reminder system.
Major Service Intervals:
Spark plugs, transmission fluid changes, brake fluid flush typically scheduled at specific mileage intervals (e.g., 40,000-100,000 miles, refer to manual).
Fluid Specifications
Engine Oil Specification:
MB 229.5 or MB 229.51 (e.g., Mobil 1 0W-40 or 5W-40 synthetic, consult manual for exact grade and viscosity).
Engine Oil Capacity:
Approx. 6.5 - 8.5 quarts (6.2 - 8.0 liters) depending on engine, with filter.
Coolant Specification:
MB Spec 325.0 or 326.0 (Antifreeze/Coolant - typically a silicate-free, organic acid technology based coolant, often blue or green).
Brake Fluid Specification:
DOT 4 Plus (MB Spec 331.0)
Known Issues
Common W203 Issues:
Mass airflow sensor (MAF) issues, ignition coil failures, ABS/ESP sensor failures, oil cooler leaks (M272 engines), camshaft position sensors, sunroof drain blockage, climate control actuator failures.
Amg Specific Issues:
Supercharger belt tensioner, intercooler leaks (C32 AMG), crankshaft position sensor (C55 AMG).
Filters
Oil Filter Part Number Example:
Mann-Filter HU 718/5 y, Mahle OX 932 D (verify for specific engine)
Cabin Air Filter Part Number Example:
Mann-Filter CU 25 010, Mahle LAK 179 (verify for specific vehicle)
📚 Vehicle History
Brand Heritage
Manufacturer Legacy:
Mercedes-Benz is a renowned German automotive manufacturer with a long history of producing luxury vehicles, known for engineering, safety, and durability.
Model Evolution
W203 Introduction:
The W203 C-Class succeeded the W202 and was produced from 2000 to 2007. The facelifted W203, which this manual covers, debuted for the 2005 model year.
Facelift Changes:
The 2005 facelift brought revised styling (front and rear fascias, headlights), updated interior trim, new engine options (M272 V6), and improved technology.
Primary assembly in Germany (Sindelfingen, Bremen), with production also occurring in other global locations.
🏆 Awards & Recognition
Recognitions
IIHS Top Safety Pick Mention:
The W203 C-Class generally performed well in safety tests of its era, often earning good ratings from IIHS and NHTSA.
Jd Power Dependability Mention:
Mercedes-Benz vehicles are typically recognized for build quality and engineering, though specific model year awards vary. This manual assists in maintaining that quality.
Ratings
Consumer Reports Reliability:
Varies by year and specific component; this manual is crucial for understanding potential weak points and proper maintenance to enhance reliability.
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