🏷️ Basic Information

Make:

Mercedes-Benz

Model:

C-Class

Year:

2009

Trim Level:

C230

Chassis Code:

W204

👋 Introduction

Market Position:

The 2009 C-Class (W204) represented Mercedes-Benz's entry into the compact executive sedan segment, aiming to capture a younger demographic while upholding the brand's reputation for luxury, safety, and engineering.

Competitive Analysis:

Competed directly with established premium compact sedans such as the BMW 3 Series, Audi A4, Lexus IS, and Infiniti G37. The W204 offered a balance of comfort, technology, and performance expected from a Mercedes-Benz.

Key Features:

Modern styling, advanced safety features (including PRE-SAFE), optional COMAND infotainment system, AGILITY CONTROL suspension, and a range of efficient gasoline and diesel engines.

Chassis Technology:

AGILITY CONTROL suspension system offered variable damping for improved ride comfort and handling.

📋 Manual Details

Manual Coverage Scope:

Comprehensive owner information, maintenance, specifications, and operational details for the 2009 Mercedes-Benz C-Class C230.

Specific Sections Listed:

Introduction, Instrument Cluster, Entertainment Systems, Climate Controls, Lights, Driver Controls, Locks and Security, Seating and Safety Restraints, Driving, Customer Assistance, Reporting safety defects (U.S.only), Cleaning, Maintenance and Specifications, Engine compartment, Engine oil, Battery, Fuel information, Air filter(s), Part numbers, Refill capacities, Lubricant specifications, Accessories.

Estimated Page Count:

Likely 300-500 pages based on typical Mercedes-Benz owner's manuals for this era.

Manual Type:

Owner's Manual

Language:

English

Format:

Digital PDF

Accessibility:

Instant download, accessible via any device with a PDF reader.

📖 Manual Coverage

Systems Covered:

Instrument Cluster, Entertainment Systems (COMAND, Audio 20), Climate Controls (THERMATIC/THERMOTRONIC), Lighting Systems, Driver Controls (Steering Wheel Functions, Cruise Control, Mbrace), Locks and Security (Keyless-Go, Central Locking, Immobilizer), Seating and Safety Restraints (Airbags, Seatbelts, ISOFIX), Driving Aids (ABS, ESP, Traction Control), Vehicle Maintenance, Engine Compartment Overview, Fluid Specifications, Fuel Information, Battery, Air Filters, Part Numbers, Refill Capacities, Lubricant Specifications, Accessories.

Procedures Included:

Normal operation of vehicle systems, basic maintenance checks (fluid levels, tire pressure), understanding warning indicators, infotainment system usage, climate control adjustments, lock and security system operation, safety restraint usage, basic troubleshooting guidance, customer assistance procedures, cleaning recommendations, reporting safety defects (U.S. only).

Technical Depth:

Covers operational aspects, driver-centric information, and basic maintenance. It does not include in-depth diagnostic procedures or repair instructions typically found in a Service Manual or Technical Manual. Focus is on user understanding and routine care.

Diagnostic Coverage:

Provides guidance on interpreting warning lights and messages, but not detailed troubleshooting trees or fault code interpretation for repair.

📊 Manual Specifications

File Format:

PDF

Searchable Text:

Yes, as it's a PDF compiled from factory data, text should be searchable.

Print Quality:

Digital scan quality is factory original; printable with standard PDF readers.

Binding Type:

N/A (Digital Format)

Paper Type:

N/A (Digital Format)

⚙️ Engine Specifications

Engine Type:

M272 DE35 V6 (3.5 Liter DOHC 24-Valve Naturally Aspirated)

Horsepower:

Approx. 228 hp @ 6000 rpm

Torque:

Approx. 232 lb-ft @ 3500-5250 rpm

Fuel Delivery:

Electronic Fuel Injection (EFI)

Ignition System:

Electronic ignition with coil-on-plug system.

Recommended Fuel:

Premium Unleaded Gasoline (91 Octane or higher recommended)

Engine Oil Type:

Synthetic Engine Oil meeting MB 229.5 or MB 229.51 specifications.

Engine Block Material:

Aluminum Alloy

Cylinder Head Material:

Aluminum Alloy

Valvetrain:

DOHC (Dual Overhead Camshafts), 4 valves per cylinder

Engine Oil Capacity:

Approx. 6.9 U.S. quarts (6.5 liters) with filter change (verify in manual).

Air Filter Part Number:

Commonly A2720940104 (verify for specific VIN).

🔧 Transmission

Transmission Type:

7G-TRONIC 7-Speed Automatic Transmission

Transmission Features:

TouchShift manual shifting mode, Adaptive Electronic Control, Electronic Stability Program (ESP) integration.

Transmission Fluid Type:

MB 236.14 Automatic Transmission Fluid (ATF) (e.g., Pentosin ATF1 or equivalent).

📐 Dimensions

Length:

Approx. 180.0 inches (4572 mm)

Width:

Approx. 69.7 inches (1770 mm)

Height:

Approx. 56.0 inches (1422 mm)

Wheelbase:

Approx. 108.7 inches (2760 mm)

Front Track:

Approx. 60.2 inches (1529 mm)

Rear Track:

Approx. 58.4 inches (1483 mm)

Curb Weight:

Approx. 3500-3700 lbs (1588-1678 kg) depending on equipment.

Gross Vehicle Weight Rating:

Typically around 4600-4800 lbs (2087-2177 kg) (verify in manual for specific configuration).

Trunk Capacity:

Approx. 15.1 cubic feet (428 liters).

🛡️ Safety Features

NHTSA Front Crash Rating:

5-Star (for model year 2009 generally).

IIHS Top Safety Pick:

Yes (for model year 2009 generally).

Passive Safety Features:

Dual-stage front airbags, front side airbags, side curtain airbags, anti-lock braking system (ABS), Electronic Stability Program (ESP), Traction Control System (TCS), active front head restraints, seatbelt pre-tensioners.

Child Seat Anchors:

ISOFIX (LATCH) system for rear outboard seating positions.

Active Safety Features:

Advanced handling dynamics, optional advanced parking assist, optional adaptive cruise control (DISTRONIC).

💡 Technology Features

Infotainment System:

Optional COMAND APS (Cockpit Management and Data System) with integrated navigation, CD/DVD player, Bluetooth connectivity, and auxiliary input. Base models feature Audio 20.

Display Size Comand:

Approx. 5.8 or 7-inch central display (depending on specific COMAND system installed).

Driver Assistance Systems:

Standard ABS, ESP, ASR (Acceleration Slip Regulation). Optional features could include PARKTRONIC, DISTRONIC (adaptive cruise control), Lane Keeping Assist.

Connectivity Features:

Bluetooth hands-free calling and audio streaming (with COMAND or Audio 20 upgrade), optional Mbrace (telematics and emergency assistance).

🔧 Maintenance

Oil Change Interval:

Variable, based on Mercedes-Benz 'Service A' or 'Service B' indicators displayed on the instrument cluster, typically around 10,000 miles or 1 year (follow vehicle's service indicator).

Major Service Interval:

Major services (e.g., spark plug replacement, transmission service) typically every 60,000-100,000 miles or as indicated by the Service B alerts.

Coolant Type:

Mercedes-Benz Coolant/Antifreeze, blue (MB 325.0, MB 326.0) or similar meeting specification.

Brake Fluid Type:

DOT 4 Plus (MB 331.0) brake fluid.

Power Steering Fluid Type:

Hydraulic power steering fluid (MB 343.0) or equivalent.

Common Issues:

M272 engine balance shaft wear (affecting older models but possible), oil cooler leaks, sunroof drain clogs, squeaky front suspension components, potential for electronic module issues, ignition coil failures.

Cabin Air Filter Part Number:

Commonly A2048300418 (verify for specific VIN).

Maintenance Schedule Overview:

Follows Mercedes-Benz flexible service system, indicated by service notifications on the instrument cluster (Service A, Service B, etc.).

📚 Vehicle History

Brand Heritage:

Mercedes-Benz, founded in 1926, has a long-standing legacy of automotive innovation, luxury, and engineering excellence, particularly in safety and performance.

Model Evolution:

The W204 C-Class, introduced for the 2008 model year, represented a significant redesign from its predecessor (W203). It adopted a more aggressive and contemporary styling, improved chassis dynamics, and enhanced technology offerings.

Production Years:

W204 generation: 2007-2014 (model years 2008-2015 in most markets).

Manufacturing Locations:

Primary assembly in Bremen, Germany; also produced in other global facilities.

🏆 Awards & Recognition

Recognitions:

The W204 generation frequently received accolades for safety, design, and overall value in its segment from automotive publications and organizations globally.