🏷️ Basic Information

Make:

Mercedes-Benz

Model:

S400

Year:

2011

Chassis Code:

W221

Production Code:

S400 Hybrid (e.g., W221.194 for specific markets)

👋 Introduction

Market Position:

Flagship luxury sedan, representing Mercedes-Benz's pinnacle of comfort, technology, and engineering. Positioned to compete with other ultra-luxury marques, offering advanced hybrid powertrain technology.

Competitive Analysis:

Competed directly with models like the BMW 7 Series, Audi A8, Lexus LS, and Porsche Panamera. Its hybrid powertrain was a key differentiator, offering enhanced fuel efficiency for a vehicle of its class.

Key Features:

Hybrid powertrain, advanced safety systems (PRE-SAFE), COMAND infotainment, luxurious interior appointments, AIRMATIC suspension, and extensive customization options.

📋 Manual Details

Coverage Areas:

All mechanical and electrical systems, maintenance, troubleshooting, diagnostics, repair procedures for the 2011 Mercedes-Benz S400.

Body And Chassis Coverage:

Includes body repair, panel replacement, interior trim, glass, and chassis component adjustments.

Page Count:

Extensive (Digital software, exact page count not specified but indicative of a complete factory manual equivalent).

Manual Type:

Service & Repair Manual Software

Language:

English

Format:

Software (likely digital executable or PDF-based).

📖 Manual Coverage

Systems Covered:

Engine mechanical, engine electrical, fuel system, ignition system, exhaust system, cooling system, climate control, transmission (automatic), drivetrain, suspension, steering, brakes (ABS, ESP), body control modules, lighting, multiplexing (CAN bus), multimedia, navigation, safety systems (airbags, seatbelts), diagnostic trouble codes (DTCs) interpretation.

Hybrid Powertrain Coverage:

Detailed diagnostics and repair procedures for the electric motor, high-voltage battery system, power electronics, and hybrid control module.

Climate Control System:

Detailed coverage of automatic climate control, A/C system components, refrigerant handling, and diagnostic procedures.

Procedures Included:

Routine maintenance, scheduled service, diagnostic procedures, component removal and installation, torque specifications, wiring diagrams, troubleshooting guides, repair sequences, specifications and data, special tools, exploded views.

Troubleshooting Charts:

Detailed symptom-based troubleshooting charts linked to specific diagnostic procedures.

Diagnostic Tools:

Information on using Mercedes-Benz diagnostic tools like STAR DIAGNOSIS (XENTRY/DAS).

Technical Depth:

Comprehensive, covering basic maintenance to in-depth system diagnostics and repair, including hybrid system specific troubleshooting.

Wiring Diagrams:

Complete, color-coded electrical wiring diagrams for all vehicle systems.

📊 Manual Specifications

File Format:

Proprietary Software/Digital Format (as indicated by 'Software'). Likely searchable and with hyperlinked diagrams.

Searchable Text:

Yes (standard for quality service manual software).

Print Quality:

N/A (Digital Format)

Binding Type:

N/A (Digital Format)

Paper Type:

N/A (Digital Format)

⚙️ Engine Specifications

Primary Engine:

M272 (3.5L V6 with electric motor)

Horsepower:

302 hp (combined system output)

Torque:

339 lb-ft (combined system torque)

Fuel System:

Direct Injection (for gasoline engine), Lithium-ion battery pack, integrated electric motor.

Hybrid System Type:

Mild Hybrid (with electric motor assisting gasoline engine, limited electric-only propulsion).

Engine Code Details:

M272 E35 ML (3.5L V6 gasoline engine component).

Engine Code:

M272

Displacement:

3.5 Liters (3498 cc)

Engine Type:

V6, 24-Valve DOHC with Variable Valve Timing

🔧 Transmission

Standard:

7-speed automatic transmission (7G-TRONIC PLUS with hybrid integration).

Optional:

Not applicable for the S400 Hybrid.

Features:

Shift paddles, Comfort (C) and Sport (S) modes, manual shifting mode, integrated hybrid drive.

📐 Dimensions

Wheelbase:

124.6 inches (3165 mm)

Length:

206.5 inches (5247 mm)

Width:

73.7 inches (1872 mm)

Height:

58.5 inches (1486 mm)

Curb Weight:

Approx. 4,600 - 4,800 lbs (2087 - 2177 kg) depending on options.

Gross Vehicle Weight Rating:

Approx. 6,100 lbs (2767 kg)

Towing Capacity:

Not Recommended/Not Specified for this luxury model.

🛡️ Safety Features

NHTSA Ratings:

Likely achieved 5-star ratings in relevant crash tests (typical for S-Class models of this era), although specific 2011 S400 ratings may vary by region.

Active Features:

ABS, Electronic Stability Program (ESP), Traction Control System (TCS), PRE-SAFE® brake, Active Lane Keeping Assist, Active Blind Spot Assist, Adaptive Cruise Control (DISTRONIC PLUS).

Passive Features:

Front airbags, side airbags, curtain airbags, knee airbags (driver and passenger), active front head restraints, seatbelt pretensioners.

💡 Technology Features

Infotainment System:

COMAND APS (Cockpit Management and Navigation Display) with Bluetooth connectivity, CD/DVD changer, HDD navigation, USB and auxiliary inputs.

Screen Size:

8-inch central display.

Driver Assistance:

DISTRONIC PLUS (Adaptive Cruise Control), PARKTRONIC (Parking Assist), Surround View Camera, Lane Keeping Assist, Blind Spot Assist, Night View Assist.

Connectivity Features:

Bluetooth hands-free calling and audio streaming, optional SiriusXM Satellite Radio, optional Harman Kardon LOGIC 7 surround sound system.

Hybrid Technology:

Lithium-ion battery pack, electric motor integrated with the transmission, regenerative braking, ECO start/stop functionality, enables limited electric-only driving at low speeds.

🔧 Maintenance

Service Intervals:

Typically, minor service (oil change, filters) every 10,000 miles or 1 year, and major service (comprehensive inspection, fluid changes) every 20,000 miles or 2 years, or as indicated by the Flexible Service System (ASSYST PLUS). Hybrid-specific checks may have different intervals.

Engine Oil Spec:

SAE 0W-40 or 5W-40, API SN or MB-Approval 229.5.

Coolant Spec:

Mercedes-Benz Approved Antifreeze/Coolant (e.g., ZEREX G48 or equivalent, blue color), typically a 50/50 mix with distilled water.

Brake Fluid Spec:

DOT 4 Plus or DOT 5.1 (MB-Approval 331.0 recommended).

Transmission Fluid Spec:

MB-Approval 236.14 (e.g., Shell ATF 134).

Known Issues:

Potential issues include: air suspension leaks, Airmatic compressor failures, 'Check Engine' lights due to various sensors (e.g., camshaft position), ignition coil issues, transmission solenoid issues, and early hybrid battery degradation (though less common on this specific generation compared to later ones). Water ingress into the ECU or SAM modules can also be a concern.

Oil Filter Part Number:

Likely A2721800009 or equivalent.

Air Filter Part Number:

Likely A2720940204 or equivalent.

Cabin Filter Part Number:

Likely A2218300718 or equivalent.

📚 Vehicle History

Brand Heritage:

Mercedes-Benz has a long-standing heritage of producing luxury vehicles and pioneering automotive technology since its inception.

Model Evolution:

The S-Class represents the flagship model of Mercedes-Benz, continuously evolving with each generation to incorporate the latest advancements in safety, comfort, and technology. The W221 generation (2006-2013) introduced the S400 Hybrid variant as a step towards more fuel-efficient luxury.

Production Location:

Sindelfingen, Germany

🏆 Awards & Recognition

Recognitions:

While specific awards for the 2011 S400 Hybrid might be harder to isolate, the S-Class line consistently receives accolades for safety, luxury, and innovation. It was often praised for its advanced technology and comfortable ride.