Segment:
Compact Executive Sedan
Target Audience:
Owners seeking to perform DIY maintenance and repairs, independent repair shops, automotive technicians
Competitors:
BMW 3 Series, Audi A4, Lexus IS
Vehicle Strengths:
Luxurious interior, refined ride quality, advanced safety features, powerful yet efficient engine
Manual Value Proposition:
Official licensing ensures accuracy and completeness, digital format provides quick access and searchability, covers all essential repair and maintenance aspects for the 2009 C350.
Coverage:
Comprehensive Service and Repair
Estimated Pages:
Extensive (Software dependent, typically thousands of pages in compiled digital format)
Type:
Service and Repair Manual Software
Format:
Software (Digital Download/Online Access)
Powertrain:
Engine (M272 V6), Transmission (7G-TRONIC PLUS 722.9), Differential, Exhaust System
Chassis:
Suspension (Front & Rear), Steering, Brakes (ABS, ESP), Wheels & Tires
Electrical:
Engine Control Unit (ECU), Body Control Module (BCM), Lighting Systems, Audio System, Navigation, Climate Control, CAN Bus Communication, Sensors, Actuators, Wiring Diagrams
Body:
Interior Trim, Exterior Body Panels, Doors, Hood, Trunk, Windows, Mirrors, Seats, HVAC System (Components)
Maintenance:
Oil changes, filter replacements, fluid checks and top-offs, tire rotation, brake inspection, battery testing
Repair:
Engine component replacement (spark plugs, coils, belts, hoses, pulleys), transmission service and repair, brake caliper/rotor replacement, suspension strut/bushings, steering rack, electrical component diagnosis and replacement
Troubleshooting:
Diagnostic trouble codes (DTCs) interpretation, symptom-based troubleshooting guides, electrical circuit analysis
Special Procedures:
Software updates, key programming, component calibration, fluid bleeding procedures (brake, coolant)
Depth:
Detailed step-by-step repair instructions, diagnostic flowcharts, torque specifications, electrical schematics, component identification, overhaul procedures
Digital Features:
Searchable text, hyperlinked navigation, printable sections, high-resolution diagrams
Diagram Clarity:
High-resolution, clear, and detailed diagrams and illustrations
Paper Quality:
N/A (Software)
Transmission Type:
7G-TRONIC PLUS (722.9) 7-Speed Automatic
Optional Transmission:
N/A for 2009 C350
Transmission Features:
Driver-adaptive shift modes (Comfort, Sport), Manual mode with paddle shifters (optional), Electronic shifter
Transmission Fluid Type:
MB Specification 236.14 (e.g., Mobil ATF 134, Mercedes-Benz ATF V)
NHTSA Front Crash Rating:
5-Star
NHTSA Side Crash Rating:
5-Star
IIHS Top Safety Pick:
Yes
Electronic Stability Control:
Standard (ESP - Electronic Stability Program)
Antilock Braking System:
Standard (ABS)
Traction Control:
Standard (ASR - Acceleration Slip Regulation)
Brake Assist:
Standard (BAS - Brake Assist System)
Airbags:
Front airbags (driver & passenger), front side-impact airbags, curtain airbags (front & rear), optional front-bassinet airbags
Seatbelts:
3-point inertia-reel seatbelts with belt tensioners and force limiters
Head Restraints:
Active NECK-PRO head restraints (front)
Infotainment System Name:
COMAND (Cockpit Management and Navigation)
Infotainment Features:
Color LCD display, AM/FM/Weatherband radio, CD/DVD player, MP3 compatibility, optional navigation system, Bluetooth connectivity (hands-free calling), SD card slot
Driver Assistance Features:
Optional DISTRONIC PLUS (adaptive cruise control), PARKTRONIC (parking assist), Lane Keeping Assist, Blind Spot Assist
Connectivity Options:
Bluetooth for phone, optional UHI (Universal Hands-free Interface) for phone adapter, optional SiriusXM satellite radio
Oil Change Interval Miles:
Typically every 10,000 miles or 12 months, whichever comes first (flexible service system 'ASSYST')
Major Service Interval Miles:
Refer to ASSYST system or manual for specific items like spark plugs (approx. 60,000-100,000 miles), transmission fluid (check service history, often around 40,000-60,000 miles for severe use)
Engine Oil Type:
MB Specification 229.5 (e.g., Mobil 1 0W-40, Castrol Syntec 0W-40)
Engine Oil Capacity Quarts:
8.0 (with filter)
Coolant Type:
MB Specification 325.0 (Blue) or 326.0 (Green) - Ethylene Glycol based
Brake Fluid Type:
DOT 4 Plus (MB Specification 331.0)
Power Steering Fluid Type:
MB Specification 345.0 (Hydraulic Fluid)
Common Complaints:
Balance shaft wear on M272 engine (older models, less common by 2009 but still possible), oil leaks from valve covers/oil cooler seals, potential failure of the aux water pump, ESP/ABS sensor issues, early infotainment system glitches.
Maintenance Recommendations:
Adherence to flexible service schedules, use of correct MB-spec fluids, timely replacement of serpentine belt and tensioner, checking for oil leaks at regular intervals.
Heritage Overview:
Mercedes-Benz has a long-standing reputation for engineering excellence, luxury, and safety, dating back to the invention of the automobile.
W204 Introduction:
The W204 generation of the C-Class was introduced in 2007, replacing the W203. It featured a more aggressive styling and improved driving dynamics.
Production Period:
2007-2014 (for W204 generation)
Manufacturing Locations:
Germany, South Africa, China, Vietnam
Model Year Awards:
IIHS Top Safety Pick for its excellent safety performance. Often praised by automotive critics for its blend of luxury, performance, and value in the compact executive segment.
Consumer Satisfaction:
Generally good consumer satisfaction, with positive remarks on build quality and driving experience, though some owners report higher than average repair costs compared to non-premium brands.
Manufacturing Standards:
Adheres to stringent Mercedes-Benz internal quality and safety standards.
