🏷️ Basic Information

Make:

Mercedes-Benz

Model:

S550

Year:

2011

Vehicle Chassis Code:

W221

Product Type:

Service & Repair Manual Software

👋 Introduction

Market Position:

Flagship luxury sedan, representing the pinnacle of Mercedes-Benz engineering and comfort.

Competitive Analysis:

Competes directly with other ultra-luxury sedans such as the BMW 7 Series, Audi A8, Lexus LS, and Porsche Panamera.

Key Features:

Advanced suspension systems (ABC/AIRMATIC), powerful V8 engine, extensive safety features, luxurious interior appointments, cutting-edge technology, and refined ride quality.

📋 Manual Details

Coverage Areas:

Full Service & Repair Coverage

Page Count:

Extensive (Digital Software)

Manual Type:

Official Diagnostic & Repair Manual

Manual Version:

Official Factory Service Manual (FSM) equivalent

Language:

English

Format:

Software (Digital Download/Online Access)

📖 Manual Coverage

Systems Covered:

Engine Mechanical, Engine Control (ECU), Fuel System, Ignition System, Cooling System, Lubrication System, Exhaust System, Transmission (7G-TRONIC), Drivetrain (4MATIC All-Wheel Drive), Suspension (ABC - Active Body Control, AIRMATIC), Steering System, Brake System (ABS, ESP), Electrical System (12V, CAN Bus), Climate Control, Air Conditioning, Body & Chassis, Interior Systems, Exterior Lighting, Safety Systems (Airbags, Seatbelts), ADAPTIVE BRAKE with HOLD function, Lighting systems, CAN gateway, diagnostics, wiring diagrams

Procedures Included:

Scheduled maintenance, routine inspections, detailed troubleshooting procedures, step-by-step repair instructions, component removal and installation, diagnostic fault code (DTC) interpretation and resolution, wiring diagram analysis, fluid level checks and changes, filter replacements, brake caliper service, suspension component replacement, engine timing, torque specifications, reset procedures, software updates (if applicable to diagnostic tools), component testing and calibration

Technical Depth:

Comprehensive from basic maintenance to advanced diagnostics and complete component overhauls, including electrical system schematics and troubleshooting trees.

Diagnostic Tools Compatibility:

Designed to be used in conjunction with Mercedes-Benz diagnostic tools such as XENTRY/DAS (Diagnostic Assistance System), offering detailed diagnostic information and repair procedures.

Body And Chassis Coverage:

Detailed information on body construction, door mechanisms, hood and trunk operation, body panel alignment, rust prevention, and corrosion protection.

Electrical System Coverage:

Extensive coverage of the 12V electrical system, including battery management, alternator, starter motor, fuses, relays, CAN bus communication network, multiplexed systems, and troubleshooting of electrical faults.

📊 Manual Specifications

File Format:

Proprietary Mercedes-Benz diagnostic software format (e.g., XENTRY/WIS based)

Print Quality:

N/A (Digital)

Binding Type:

N/A (Digital)

Paper Type:

N/A (Digital)

Searchability:

Fully searchable text for quick access to specific information, diagrams, and procedures.

⚙️ Engine Specifications

Engine Code:

M273

Engine Type:

Naturally Aspirated V8

Displacement:

5.5 Liters (5461 cc)

Bore X Stroke:

98.0 mm x 90.5 mm

Compression Ratio:

10.7:1

Horsepower:

382 hp @ 6000 rpm

Torque:

391 lb-ft @ 2800-4800 rpm

Acceleration 0 60 Mph:

Approximately 5.4 seconds (RWD), 5.3 seconds (4MATIC)

Fuel Delivery:

Electronic Fuel Injection (Bosch MED 17.7)

Fuel Type:

Premium Unleaded Gasoline (91+ octane)

Engine Control Unit:

Bosch MED 17.7

Engine Sensors:

Includes troubleshooting for crankshaft position sensor, camshaft position sensors, mass air flow (MAF) sensor, oxygen sensors (O2), temperature sensors, knock sensors.

Coolant Type:

Mercedes-Benz Specification 325.0 (Glysantin G48 equivalent)

Oil Type:

Mobil 1 Synthetic ESP Formula 0W-40 (MB 229.51 Specification)

🔧 Transmission

Transmission Type:

7-Speed Automatic (7G-TRONIC)

Transmission Fluid Type:

MB 236.14 Specification

Drivetrain Options:

4MATIC All-Wheel Drive

Transmission Features:

Driver-adaptive shifting, manual mode with steering wheel shift buttons, Comfort (C) and Sport (S) modes.

📐 Dimensions

Length:

200.9 inches (5103 mm)

Width:

73.7 inches (1872 mm)

Height:

59.3 inches (1506 mm)

Wheelbase:

118.7 inches (3015 mm)

Curb Weight:

4431-4564 lbs (2010-2070 kg)

Gross Vehicle Weight Rating:

5644 lbs (2560 kg)

Front Headroom:

38.3 inches

Rear Headroom:

39.5 inches

Front Legroom:

41.7 inches

Rear Legroom:

43.7 inches

🛡️ Safety Features

NHTSA Front Crash Test Rating:

5-Star

IIHS Top Safety Pick:

Yes

Active Safety Features:

ADAPTIVE BRAKE with HILL START ASSIST, Electronic Stability Program (ESP), Anti-lock Braking System (ABS), Brake Assist (BAS), PRE-SAFE® system, ATTENTION ASSIST, Active Lane Keeping Assist, Active Blind Spot Assist (optional), DISTRONIC PLUS (optional)

Adaptive Brake System:

Detailed explanation and diagnostic procedures for ADAPTIVE BRAKE with HOLD function, Hill Start Assist, and brake drying features.

Passive Safety Features:

Dual-stage front airbags, front side airbags, front and rear side curtain airbags, front pelvic airbags, Active head restraints, front seatbelt pretensioners with force limiters.

💡 Technology Features

Infotainment System:

COMAND APS (Cockpit Management and Navigation System) with integrated hard-drive navigation, CD/DVD changer, SD card slot, USB interface, and Bluetooth connectivity.

Display:

8-inch high-resolution color display.

Driver Assistance Features:

DISTRONIC PLUS (Adaptive Cruise Control), PARKTRONIC (Parking Assist), rearview camera, Lane Keeping Assist, Blind Spot Assist, NIGHT VIEW ASSIST (optional).

Driver Assistance Features Detail:

Includes operation, calibration, and troubleshooting for DISTRONIC PLUS, Lane Keeping Assist, Blind Spot Assist, and PARKTRONIC.

Connectivity Options:

Bluetooth for hands-free calling and audio streaming, optional Mercedes-Benz Mbrace telematics system.

Comfort Technology:

Multi-contour front seats with massage function, heated and ventilated front seats, ambient interior lighting, KEYLESS-GO, power closing doors, dual-zone or multi-zone automatic climate control.

🔧 Maintenance

Major Service Interval:

Approximately every 10,000 miles or 12 months, whichever comes first. Specific service items (e.g., brake fluid, spark plugs) have different intervals as detailed in the manual.

Oil Change Interval:

Variable Service Interval (VSI) system, typically around 10,000-13,000 miles or 12 months for synthetic oil.

Brake Fluid Change Interval:

Every 2 years

Engine Oil Specification:

MB 229.51 (e.g., Mobil 1 ESP Formula 0W-40)

Transmission Fluid Specification:

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

Coolant Specification:

MB 325.0 (e.g., Mercedes-Benz Coolant Concentrate)

Brake Fluid Specification:

DOT 4 Plus (MB 331.0)

Common Issues:

Air suspension issues (struts, pump), COMAND system glitches, SBC (Sensors, Brakes, Control) unit potential failures (though largely addressed by 2011), catalytic converter issues, transmission control module faults, oil cooler leaks.

Maintenance Notes:

Requires specialized diagnostic tools (like XENTRY/DAS) for accurate fault diagnosis and resetting service indicators. Regular checks of air suspension and ABC fluid levels are crucial.

Oil Filter Part Number:

A2731840125 (Example, always verify for specific VIN)

Air Filter Part Number:

A2730940704 (Example, always verify for specific VIN)

Cabin Filter Part Number:

A2218300518 (Example, always verify for specific VIN)

📚 Vehicle History

Brand Heritage:

Mercedes-Benz has a long-standing reputation for automotive innovation, luxury, safety, and engineering excellence dating back to the invention of the automobile.

Model Evolution:

The S-Class represents the flagship luxury sedan of Mercedes-Benz, with a lineage stretching back decades. The W221 generation, introduced for the 2006 model year, was characterized by its bold styling, advanced technology, and focus on driver and passenger comfort. The 2011 model represents a mid-cycle refresh (facelift) for this generation, incorporating updated styling, improved technology, and enhanced efficiency.

Facelift Details:

The 2011 model received updated front and rear bumpers, revised LED lighting (headlights, taillights, daytime running lights), new wheel designs, and interior trim enhancements.

Production Years:

2006-2013 (W221 Generation)

Manufacturing Location:

Sindelfingen, Germany

🏆 Awards & Recognition

Industry Awards:

The S-Class consistently receives accolades for its luxury, safety, and technological advancements. Specific awards for the 2011 model year would typically be found in automotive press reviews of the time.

Consumer Ratings:

Generally high ratings from automotive publications and consumer surveys for comfort, performance, and luxury. Reliability ratings can vary and are often dependent on proper maintenance as outlined in this manual.

Certifications:

Certified to meet all applicable US and international automotive safety and emissions standards.