2009 Mercedes S-Class (W221) Service and Repair Manual

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🏷️ Basic Information Identification Make: Mercedes-Benz Model: S-Class Model Code: W221 Year: 2009 Generation Generation Designation: Fifth Generation (W221) Generation Years: 2005-2013 Codes Chassis Code: W221 👋 Introduction Market Position...

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标签: 2009 Car Cars Mercedes Misc S-Class W221

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Description

🏷️ Basic Information

Identification

Make:

Mercedes-Benz

Model:

S-Class

Model Code:

Year:

Generation

Generation Designation:

Fifth Generation (W221)

Generation Years:

2005-2013

Codes

Chassis Code:

👋 Introduction

Market Position

Market Segment:

Full-size Luxury Sedan

Competitors:

BMW 7 Series, Audi A8, Lexus LS, Porsche Panamera, Jaguar XJ

Key Features

Design Philosophy:

Elegant and sophisticated design, advanced technology, supreme comfort, and powerful performance

Technological Innovations:

AIRMATIC/ABC suspension, DISTRONIC PLUS, COMAND NTG 3.5 infotainment, advanced safety systems

Manual Utility:

Provides dealership-level diagnostic and repair procedures, ensuring accurate and efficient maintenance

📋 Manual Details

Coverage Areas

Coverage Scope:

All models and all repairs A-Z

Page Count

Page Count Estimate:

Varies by specific volume, typically 1000+ pages for comprehensive coverage

Manual Type

Manual Classification:

Factory Service Manual (FSM) / Repair Manual

Language

Language:

English

Format

Format:

Digital (PDF)

File Format Details:

Searchable PDF, allows for quick access to information via keywords and table of contents

Print Quality

Print Quality:

High-resolution images, diagrams, and text for clear viewing and printing

Binding Type

Binding Type:

Not applicable for digital format, but original printed manuals typically feature sturdy binding for frequent use

Paper Type

Paper Type:

Not applicable for digital format, but original printed manuals often use durable, glossy paper

📖 Manual Coverage

Systems Covered

Engine Systems:

Engine mechanical, engine management, fuel injection, ignition system, exhaust system, cooling system, lubrication system, emission control systems

Transmission Systems:

Automatic transmission (e.g., 7G-TRONIC), transmission control module, torque converter, driveline components (axles, driveshafts)

Braking Systems:

Brake hydraulics, ABS, ESP (Electronic Stability Program), SBC (Sensotronic Brake Control - early W221 variants), brake pads, rotors, calipers, parking brake

Electrical Systems:

12V electrical system, charging system (alternator, battery), starter system, lighting (headlights, taillights, interior), wiring diagrams, fuses, relays, body control module (BCM), CAN bus communication

Suspension Steering:

Front and rear suspension components, Active Body Control (ABC) or AIRMATIC air suspension systems, power steering system, steering column, wheel alignment specifications

HVAC System:

Heating, ventilation, and air conditioning (HVAC) system operation, components, refrigerant handling, climate control module

Body And Interior:

Body panels, doors, hinges, latches, interior trim, seats, airbags, restraints, glass, sunroof

Infotainment Navigation:

COMAND system, radio, navigation, telephone, media interface, speaker systems

Driver Assistance:

Distronic Plus (adaptive cruise control), Parktronic (parking assist), Lane Keeping Assist, Blind Spot Assist, Night View Assist

Procedures Included

Maintenance Procedures:

Scheduled maintenance tasks, oil changes, filter replacements, fluid checks and top-offs, tire rotation, brake inspection

Troubleshooting Diagnostics:

Diagnostic trouble codes (DTCs), symptom-based troubleshooting, component testing, electrical system diagnostics

Repair Procedures:

Step-by-step instructions for component removal and installation, internal component repair, adjustments

Specification Data:

Torque specifications, fluid capacities, diagnostic values, alignment specifications, electrical schematics

Special Tools:

Identification and usage of specialized tools required for specific repair procedures

Technical Depth

Depth Of Coverage:

Comprehensive from basic maintenance to advanced diagnostics and full mechanical/electrical overhauls

Diagnostic Capabilities:

Detailed guidance on interpreting diagnostic trouble codes and performing component-level diagnostics

Wiring Diagrams:

Detailed, system-specific electrical wiring diagrams with component locations and circuit descriptions

⚙️ Engine Specifications

Primary Engine

Engine Options 2009:

3.5L V6 (M272), 5.5L V8 (M273), 6.0L V12 (M275)

Engine Code V6:

M272 E35

Engine Code V8:

M273 E55

Engine Code V12:

M275 E60

Performance

V6 Horsepower:

268 hp @ 6000 rpm (approx.)

V6 Torque:

258 lb-ft @ 2400-5000 rpm (approx.)

V8 Horsepower:

382 hp @ 6000 rpm (approx.)

V8 Torque:

391 lb-ft @ 2800-4800 rpm (approx.)

V12 Horsepower:

510 hp @ 5000 rpm (approx.)

V12 Torque:

612 lb-ft @ 1800-3500 rpm (approx.)

Fuel System

Fuel Type:

Premium Unleaded Gasoline

Fuel Delivery:

Sequential Electronic Fuel Injection (SEFI)

Emission Standards:

Designed to meet EPA/CARB emission standards for the model year

🔧 Transmission

Standard

Standard Transmission Type:

7-speed Automatic (7G-TRONIC)

Optional

Optional Transmission Type:

5-speed Automatic (older models, less common in 2009 W221 variants)

Features

Transmission Control:

Electronic control with multiple shift modes (Comfort, Sport)

Drivetrain:

Rear-Wheel Drive (RWD) standard, 4MATIC All-Wheel Drive (AWD) optional

📐 Dimensions

Exterior

Wheelbase:

119.7 inches (3,035 mm)

Length:

200.9 inches (5,103 mm)

Width:

73.7 inches (1,872 mm)

Height:

57.9 inches (1,471 mm)

Weights

Curb Weight V6 Rwd:

4,277 lbs (1,939 kg) approx.

Curb Weight V8 4Matic:

4,586 lbs (2,079 kg) approx.

🛡️ Safety Features

Ratings

NHTSA Front Impact Rating:

5-Star (for driver and front passenger)

IIHS Top Safety Pick:

Likely received 'Good' ratings in relevant IIHS crash tests for its era

Active Features

Active Safety Systems:

ABS, ESP, Brake Assist (BAS), Pre-Safe predictive occupant protection system, Traction Control

Optional Active Features:

Distronic Plus (Adaptive Cruise Control), Active Lane Keeping Assist, Active Blind Spot Assist, Night View Assist

Passive Features

Passive Safety Features:

Multiple airbags (front, side, curtain, knee), crumple zones, high-strength steel chassis, seatbelt pretensioners

Airbag Locations:

Frontal, front-side, rear-side, curtain, driver's knee airbags

💡 Technology Features

Infotainment

Infotainment System:

COMAND (Cockpit Management and Navigation) NTG 3.5

Infotainment Features:

AM/FM/HD radio, CD/DVD changer, navigation system, Bluetooth connectivity, voice control, optional Harman Kardon surround sound system.

Driver Assistance

Driver Assistance Suite:

Comprehensive suite including adaptive cruise control (Distronic Plus), parking assistance (Parktronic), lane departure warning, blind-spot monitoring, adaptive high-beam assist.

Connectivity

Connectivity Options:

Bluetooth for hands-free calling and audio streaming, optional Mercedes-Benz Media Interface for iPod/USB connectivity.

Comfort Convenience

Comfort Features:

Multi-contour front seats with massage function, heated and ventilated front and rear seats, multi-zone automatic climate control, ambient lighting.

🔧 Maintenance

Service Intervals

Oil Change Interval:

Typically every 10,000 miles or 12 months, whichever comes first (depending on driving conditions and oil used, refer to specific manual recommendations)

Major Service Intervals:

Refer to 'Service A' and 'Service B' schedules, which occur at alternating mileage/time intervals and include more comprehensive checks and replacements (e.g., brake fluid, cabin filters, spark plugs)

Fluid Specifications

Engine Oil Specification:

MB 229.5, MB 229.51, MB 229.52 (e.g., Mobil 1 ESP 0W-40 or similar approved synthetic)

Coolant Specification:

MB 325.0 or MB 326.0 (Blue or Green coolant, silicate-free)

Transmission Fluid Specification:

MB 236.14 (for 7G-TRONIC)

Brake Fluid Specification:

DOT 4 Plus (MB 331.0)

Known Issues

Common Issues M272 V6:

Balance shaft wear in early M272 engines (affecting timing chain), intake manifold tumble flap actuator failure, oil leaks from valve cover gaskets and oil cooler seals.

Common Issues W221 Suspension:

AIRMATIC strut leaks or compressor failure, ABC system hydraulic leaks and pump issues, control arm bushings wear.

Common Issues Electronics:

COMAND system glitches, E-Class specific issues like electronic parking brake faults, SAM (Signal Acquisition Module) issues.

Common Issues Brakes:

SBC system issues (on earlier W221 models, less common on 2009+), wear on brake pads and rotors due to vehicle weight.

📚 Vehicle History

Brand Heritage

Brand Legacy:

Mercedes-Benz has a long-standing reputation for engineering excellence, luxury, and pioneering automotive technology, particularly in the luxury sedan segment.

Model Evolution

W221 Introduction Year:

2005 (as a 2006 model year vehicle)

W221 Key Advancements:

Introduction of PRE-SAFE®, DISTRONIC PLUS, AIRMATIC suspension, COMAND NTG, and significant advancements in safety and comfort.

Production

Manufacturing Locations:

Mainly Sindelfingen, Germany

🏆 Awards & Recognition

Recognitions

General Award Categories:

Consistently recognized for luxury, safety, comfort, and technological innovation by automotive publications and organizations.

Model Reputation:

The W221 S-Class is highly regarded for its blend of performance, cutting-edge technology, and unparalleled passenger comfort, often setting benchmarks in its class.