🏷️ Basic Information

Make:

Mercedes-Benz

Model:

C-Class

Model Code:

W205

Production Years Covered:

2014, 2015, 2016, 2017, 2018

Chassis Code:

W205

👋 Introduction

Vehicle Segment:

Compact Executive Car (Entry-level Luxury)

Target Audience:

Luxury vehicle owners seeking high-quality engineering, comfort, and advanced technology

Key Competitors:

BMW 3 Series, Audi A4, Lexus IS, Cadillac ATS, Volvo S60

Segment Strengths:

Renowned for luxury, advanced technology, comfortable ride, strong brand prestige, and a wide range of powertrain options

Design Language:

Fluidic sculpture, elegant lines, advanced LED lighting, premium interior materials

Technology Integration:

State-of-the-art infotainment, sophisticated driver assistance systems, optional AIRMATIC suspension

Powertrain Variety:

Efficient turbocharged four-cylinder engines, powerful V6 biturbo engines, and economical diesel options, including AMG performance variants

📋 Manual Details

All Models Covered:

Yes (All Sedan, Coupe, Cabriolet, and Wagon variants)

Repair Scope:

A-Z (All repairs)

Estimated Page Count:

3000+

Type:

Official Factory Service and Repair Manual

Language:

English

Format:

Digital (PDF)

📖 Manual Coverage

Engine Mechanical:

Detailed procedures for all W205 engine variants including M274 (2.0L Turbo I4), M276 (3.0L Bi-Turbo V6), OM651 (2.1L Turbo Diesel I4), OM654 (2.0L Turbo Diesel I4)

Engine Management:

Engine control modules (ECM), fuel injection systems (direct and indirect), ignition systems, emissions control systems, turbocharging, variable valve timing

Transmission:

7G-TRONIC PLUS (722.9), 9G-TRONIC (725.0) automatic transmissions: overhaul, diagnostics, fluid service, mechatronics

Drivetrain:

All-wheel drive (4MATIC) system, differential service, axle shafts, driveshafts

Suspension:

Front and rear suspension components, shock absorbers, springs, control arms, steering knuckles, AIRMATIC air suspension system

Steering:

Electric Power Steering (EPS) system, steering column, tie rods, alignment specifications

Brakes:

Hydraulic brake system, ABS, ESP, SBC (if applicable), brake pad and rotor replacement, bleeding procedures, parking brake system

Electrical System:

12V battery system, charging system (alternator), starter motor, fuses, relays, wiring diagrams (comprehensive)

Body And Interior:

Body panel removal and installation, door mechanisms, interior trim, seats, airbags, HVAC system (climate control)

Comfort Systems:

Power windows, power seats, sunroof, ambient lighting, keyless-go

Infotainment And Navigation:

COMAND system, audio systems, navigation module, Bluetooth connectivity, media interface

Driver Assistance Systems:

Distronic Plus, Active Park Assist, Lane Keeping Assist, Blind Spot Assist, Pre-Safe system, radar and sensor calibration

Diagnostics And Troubleshooting:

OBD-II diagnostics, fault code interpretation, troubleshooting charts, symptom-based diagnostics

Routine Maintenance:

Oil and filter changes, air filter replacement, cabin filter replacement, spark plug replacement, fluid checks and top-offs

Major Repairs:

Engine rebuilding, transmission overhaul, component replacement (alternator, starter, water pump, fuel pump), brake caliper replacement

Component Removal And Installation:

Step-by-step instructions for removing and installing all major and minor components

Diagnostics And Testing:

Methods for testing electrical components, sensors, actuators, and mechanical systems

Calibration And Adjustment:

Procedures for calibrating sensors, aligning steering, and adjusting various systems

Special Tool Identification:

Lists of required specialized tools and their applications

Depth:

Comprehensive (from basic maintenance to complete engine and transmission rebuilds)

Diagnostic Level:

Advanced (includes wiring diagrams, sensor data interpretation, and fault code troubleshooting)

Rebuild Procedures:

Detailed step-by-step rebuild procedures for major mechanical assemblies

📊 Manual Specifications

Digital Format:

PDF

Searchability:

Fully searchable text content

Clarity:

High-resolution images, diagrams, and schematics

Print Readability:

Excellent (suitable for printing individual pages or sections)

Digital Binding:

N/A (Digital file)

Digital Paper Simulation:

N/A (Digital file)

⚙️ Engine Specifications

Engine Family:

M274 (Petrol I4), M276 (Petrol V6), OM651 (Diesel I4), OM654 (Diesel I4)

Common Variants Covered:

C 250 (M274 2.0L), C 300 (M274 2.0L), C 400/C 450 AMG Sport (M276 3.0L Bi-Turbo), C 220 d (OM651 2.1L), C 250 d (OM651 2.1L), C 300 d (OM654 2.0L)

Example Horsepower Range:

170 hp to 367 hp (excluding AMG C63)

Example Torque Range:

236 lb-ft to 384 lb-ft (excluding AMG C63)

Injection Type:

Direct Injection (BlueDIRECT), Indirect Injection (older/diesel variants)

Fuel Type:

Premium Unleaded Gasoline (RON 95/98), Diesel Fuel

Block Material:

Aluminum Alloy

Cylinder Head Material:

Aluminum Alloy

🔧 Transmission

Transmission Type:

7G-TRONIC PLUS (722.9) 7-speed automatic

Transmission Type:

9G-TRONIC (725.0) 9-speed automatic

All Wheel Drive:

4MATIC (7G-TRONIC PLUS or 9G-TRONIC)

Transmission Modes:

ECO, COMFORT, SPORT, SPORT+, Manual (via paddle shifters)

7G-Tronic Plus Fluid:

MB Spec 236.14 (e.g., Shell ATF 134, Fuchs Titan ATF 4134)

9G-Tronic Fluid:

MB Spec 236.17 (e.g., Fuchs Titan ATF 7134 FE)

📐 Dimensions

Wheelbase:

Approx. 110.5 inches (2,800 mm)

Length:

Approx. 182.7 inches (4,640 mm)

Width:

Approx. 70.5 inches (1,790 mm)

Height:

Approx. 56.3 inches (1,430 mm)

Trunk Volume Sedan:

Approx. 17.0 cu ft (480 liters)

Curb Weight Range:

Approx. 3,400 - 3,800 lbs (1,542 - 1,724 kg)

🛡️ Safety Features

NHTSA Rating:

Generally 5-Star Overall (varies by specific model year and configuration)

IIHS Top Safety Pick:

Often awarded Top Safety Pick or Top Safety Pick+

Standard Active Safety:

ATTENTION ASSIST, COLLISION PREVENTION ASSIST PLUS, ESP, ABS

Optional Active Safety:

DISTRONIC PLUS (Adaptive Cruise Control), Active Lane Keeping Assist, Active Blind Spot Assist, PRE-SAFE® Brake

Airbags:

Front airbags, side airbags, knee airbags, front and rear head curtain airbags

Structure:

High-strength steel safety cell, crumple zones

💡 Technology Features

System Name:

COMAND (Cockpit Management and Navigation)

Features:

High-resolution display, Bluetooth audio streaming, USB connectivity, voice control, optional Apple CarPlay and Android Auto (later models/updates), Burmester surround sound system

Adaptive Cruise Control:

DISTRONIC PLUS (optional), provides automatic distance control and can assist with braking and acceleration in traffic.

Parking Assist:

Active Park Assist (optional), guides the vehicle into parking spaces. PARKTRONIC parking sensors also standard or optional.

Lane Management:

Lane Keeping Assist, Active Lane Keeping Assist (optional), Blind Spot Assist (optional)

Bluetooth Functionality:

Hands-free calling, audio streaming

Media Interface:

Provides connection for external audio devices (iPod, USB).

🔧 Maintenance

Oil Change Interval:

Flexible, typically based on ASSYST PLUS system, around 10,000-15,000 miles or 12 months, whichever comes first (depending on driving conditions and oil quality)

Major Service Interval:

Service A/B intervals, typically every 20,000 miles (Service A) and 40,000 miles (Service B), including brake fluid changes (every 2 years) and coolant changes (every 5 years).

Engine Oil:

MB Spec 229.5 or 229.51 (e.g., Mobil 1 ESP 0W-40 or 5W-30, depending on engine variant and emissions requirements)

Coolant:

MB Spec 325.0 / 326.0 (Concentrate) or MB Spec 326.5 / 326.6 (Pre-diluted) - typically a silicate-free, phosphate-free organic acid technology (OAT) coolant

Brake Fluid:

DOT 4 Plus (MB Spec 331.0)

Common Problems:

Leaking valve cover gaskets (M274), transmission control module (TCM) issues (7G-TRONIC), diesel particulate filter (DPF) regeneration issues (OM651), potential battery drain from parasitic loads, HVAC blower motor resistor failures, minor electrical gremlins

Diesel Specific Issues:

AdBlue system issues (if equipped), NOx sensor failures, glow plug failures

Common Repairs Covered:

Diagnosing and replacing sensors, fixing oil leaks, transmission service and repair, brake system servicing, software updates for ECUs

📚 Vehicle History

Manufacturer:

Mercedes-Benz (Daimler AG)

Legacy:

Long history of innovation in automotive safety, comfort, and engineering since the late 19th century

W205 Generation:

Fourth generation C-Class, introduced for the 2015 model year, replacing the W204 generation.

Design Philosophy:

Shift towards a more modern, progressive, and coupe-like design; significant increase in technological features and luxury appointments, heavily influenced by the S-Class.

Manufacturing Locations:

Bremen, Germany; East London, South Africa; Beijing, China (for Chinese market)

🏆 Awards & Recognition

Design Awards:

Red Dot Design Award (for the W205 generation)

Consumer Reports Ratings:

Generally good to very good ratings for predicted reliability, but specific model year and powertrain should be researched.

Manufacturer Certification:

Factory-approved specifications and procedures, ensuring warranty compliance and OEM standards.