Segment:
Compact Executive Sedan/Coupe/Wagon
Brand Perception:
Luxury, performance, advanced technology, safety
Key Competitors:
BMW 3 Series, Audi A4, Lexus IS, Infiniti Q50, Volvo S60
Design Philosophy:
Sensual Purity, modern styling, aerodynamic efficiency
Technology Integration:
Advanced driver assistance systems, MBUX infotainment precursor, innovative chassis design
Comfort And Refinement:
Exceptional ride quality, quiet cabin, premium interior materials
Primary Coverage:
All Models & All Repairs A-Z
Specificity:
Vehicle Specific (Not Generic)
User Base:
Dealership Technicians
Estimated Page Count:
Detailed, likely exceeding 2000 pages
Type:
Service and Repair Manual
Engine Management:
Full diagnostics, repair, and component replacement for all engine variants
Powertrain:
Engine, transmission, drivetrain, axles, and differential repairs
Chassis And Suspension:
Steering, suspension components, wheel alignment, and chassis diagnostics
Braking System:
Hydraulic, ABS, ESP, brake pad/rotor replacement, and bleeding procedures
Electrical System:
Wiring diagrams, component testing, fuse/relay locations, battery diagnostics, alternator/starter
Body And Interior:
Body panel repair, door mechanisms, interior trim, seat adjustments, climate control vents
Comfort And Convenience:
Power windows, locks, mirrors, sunroof, lighting systems, and keyless entry
Safety Systems:
Airbag system diagnostics and replacement, seatbelt mechanisms
Infotainment And Navigation:
Component replacement and basic troubleshooting for COMAND/Audio 20 systems
Maintenance:
Scheduled maintenance, oil changes, filter replacements, fluid checks and top-offs
Troubleshooting:
Diagnostic flowcharts and symptom-based troubleshooting guides
Repair:
Detailed step-by-step repair procedures for all major and minor components
Diagnostics:
OBD-II diagnostics, sensor testing, control module programming guidance
Calibration:
Component calibration and adaptation procedures (e.g., throttle body, steering angle sensor)
Special Tools:
Identification and usage of specialized Mercedes-Benz tools
Depth:
Comprehensive: From basic fluid changes to complete engine and transmission overhauls, including electrical system diagnostics
Documentation Style:
Authoritative, precise, with torque specifications, clearances, and diagnostic codes
Engine Code Example:
M274 (2.0L Turbocharged Inline-4), M276 (3.0L Bi-Turbo V6 for C400/C450)
Engine Type:
Inline-4 Cylinder, Turbocharged; V6 Cylinder, Bi-Turbo
Displacement Example 1:
1991 cc (2.0 Liters)
Displacement Example 2:
2996 cc (3.0 Liters)
Horsepower Example 1:
Up to 241 hp (C300)
Horsepower Example 2:
Up to 329 hp (C400/C450 AMG Sport)
Torque Example 1:
273 lb-ft (C300)
Torque Example 2:
354 lb-ft (C400/C450 AMG Sport)
Fuel Injection:
Direct Injection (BlueDIRECT)
Fuel Type:
Premium Unleaded Gasoline (91+ Octane Recommended)
Transmission Type 1:
7G-TRONIC PLUS Automatic
Transmission Type 2:
9G-TRONIC Automatic (Introduced on select models/later in production)
Drivetrain Options:
Rear-Wheel Drive (RWD), 4MATIC All-Wheel Drive (AWD)
Transmission Modes:
ECO, COMFORT, SPORT, SPORT+, Individual
Transmission Fluid Type:
MB Approval 236.14 (for 7G-TRONIC PLUS), MB Approval 236.15 (for 9G-TRONIC)
NHTSA Rating:
Generally received 5-Star Overall Safety Rating
IIHS Top Safety Pick:
Often awarded Top Safety Pick or Top Safety Pick+
Standard Active Safety:
ATTENTION ASSIST, COLLISION PREVENTION ASSIST PLUS, Electronic Stability Program (ESP), Anti-lock Braking System (ABS)
Optional Active Safety:
DISTRONIC PLUS (Adaptive Cruise Control), Active Parking Assist, Lane Keeping Assist, Blind Spot Assist, BAS PLUS with Cross-Traffic Assist
Airbags:
Multiple front, side, knee, and curtain airbags
Seatbelts:
Pre-tensioning seatbelts with force limiters
Primary System Name:
COMAND (Cockpit Management and Navigation) or Audio 20
Display Size:
Center console display, typically 7-inch or 8.4-inch
Adas Suite:
Comprehensive suite of radar and camera-based systems for safety and convenience
Bluetooth Integration:
Standard Bluetooth connectivity for hands-free calling and audio streaming
Usb Ports:
Multiple USB ports for device charging and media playback
Oil Change Interval:
Flexible Service System (FSS), typically every 10,000 miles or 12 months, whichever comes first (depending on driving conditions)
Major Service Intervals:
Service B (approx. 20,000 miles or 24 months) includes brake fluid change, cabin filter replacement, etc.
Engine Oil Viscosity:
SAE 0W-20 (most common for M274), specific MB 229.5 spec required
Coolant Type:
Mercedes-Benz approved Antifreeze/Coolant (e.g., G48 or G05 based)
Brake Fluid Type:
DOT 4 PLUS (MB Approval 331.0)
Common Wear Items:
Brake pads/rotors, front suspension bushings, spark plugs
Potential Electrical Gremlins:
Occasional issues with sensors, COMAND system glitches, or battery drain requiring diagnostic attention
Engine Specific Concerns:
Early models may have had PCV valve issues or oil consumption concerns; later revisions addressed some of these.
Oil Filter Element:
A2741840125 (for M274 engine)
Cabin Air Filter:
A2058350247
Brand Origin:
Germany, founded 1926 (merger of Benz & Cie. and Daimler-Motoren-Gesellschaft)
C Class Predecessor:
Mercedes-Benz 190 (W201)
W205 Design Shift:
Marked a significant departure with a more fluid, organic design language compared to the W204
Production Locations:
Bremen, Germany; Tuscaloosa, Alabama, USA; Beijing, China (for specific markets)
IIHS Award:
Top Safety Pick / Top Safety Pick+ awarded by IIHS for multiple years within this generation
Consumer Ratings:
Consistently high ratings for safety, interior quality, and ride comfort from automotive publications
Reliability Perception:
Generally good, though specific model years and powertrains can have unique maintenance considerations
