🏷️ Basic Information

Make:

Mercedes-Benz

Model:

S-Class

Chassis Code:

W221

Model Year:

2010

Product Type:

Service Repair Workshop Manual

👋 Introduction

Vehicle Class:

Full-size Luxury Sedan

Target Audience:

Luxury vehicle owners, independent repair shops specializing in European vehicles, automotive technicians.

Key Competitors:

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

Vehicle Highlights:

Advanced technology, superior comfort, powerful engines, sophisticated design, and renowned safety features.

Primary Goal:

To provide detailed, accurate, and comprehensive repair and maintenance information for the 2010 Mercedes-Benz S-Class W221.

📋 Manual Details

Manual Language:

English

Manual Format:

PDF Download

Manual Type:

Factory Service Repair Workshop Manual

Licensing Terms:

No Expiry Dates, No Extra Fees

📖 Manual Coverage

Engine Mechanical:

Complete engine assembly, disassembly, overhaul, timing, cooling, lubrication, and fuel delivery systems.

Engine Management:

ECU diagnosis, sensors, actuators, ignition system, emissions control (OBD-II).

Transmission Automatic:

7G-TRONIC PLUS (722.9) service, repair, diagnostics, valve body, torque converter, fluid service.

Drivetrain:

Driveshafts, differentials, axles, wheel bearings, 4MATIC all-wheel drive system.

Suspension:

AIRMATIC semi-active air suspension, Active Body Control (ABC), front and rear suspension components, steering knuckle, control arms.

Steering:

Hydraulic power steering system, steering column, steering gear, rack and pinion.

Brakes:

ABS, ESP (Electronic Stability Program), SBC (Sensotronic Brake Control - early W221 models may have this, though 2010 typically uses a conventional hydraulic system with ESP), brake pads, rotors, calipers, hydraulic lines, parking brake.

Electrical System:

Battery, alternator, starter, wiring diagrams, fuse boxes, relays, lighting systems (headlights, taillights, interior)..

Body And Interior:

Body panels, doors, hood, trunk, bumpers, interior trim, seats, headliner, HVAC system controls.

Climate Control:

THERMOTRONIC automatic climate control, A/C system components, refrigerant, heater core, blower motor.

Infotainment And Comfort:

COMAND NTG 4.0 infotainment system, audio, navigation, Bluetooth, climate control interfaces, power seats, windows, mirrors.

Safety Systems:

AIRBAG system, seatbelt pre-tensioners, PRE-SAFE® system, Parking Assist (PARKTRONIC).

Routine Maintenance:

Oil changes, filter replacements, fluid checks and top-offs, tire rotation, brake pad replacement, spark plug replacement.

Diagnostics And Troubleshooting:

Systematic fault finding, diagnostic trouble codes (DTCs), component testing, repair procedures for common issues.

Component Replacement:

Detailed step-by-step guides for replacing major and minor components across all systems.

Rebuilding And Overhaul:

Engine and transmission rebuild procedures, including specifications and tolerances.

Electrical Component Testing:

Testing of sensors, actuators, control modules, and wiring harnesses.

Suspension And Steering Alignment:

Adjustment procedures for wheel alignment and suspension components.

Brake System Bleeding:

Procedures for bleeding the hydraulic brake system.

HVAC System Service:

Refrigerant charging, leak detection, component replacement for the climate control system.

Depth Level:

Comprehensive: Covers from basic maintenance to complete engine and transmission overhauls, including advanced diagnostics.

Diagnostic Tools Required:

Mentions proprietary diagnostic tools such as STAR DIAGNOSIS (XENTRY/DAS) for advanced troubleshooting and module programming.

Special Tools Required:

Details specific Mercedes-Benz special tools needed for certain repair procedures.

📊 Manual Specifications

File Type:

PDF

Searchability:

Searchable text content for quick information retrieval.

Printability:

Printable pages for hands-on workshop use.

Digital Access:

Instant download to computer, tablet, or smartphone.

Image Resolution:

High-resolution diagrams and illustrations.

Text Clarity:

Clear and legible text for instructions and specifications.

Binding:

Digital (PDF) - No physical binding.

Paper:

Digital (PDF) - Not applicable.

⚙️ Engine Specifications

Engine Code 2010 Us:

M272 (3.5L V6), M273 (5.5L V8), M275 (5.5L Bi-Turbo V12 - in S65 AMG).

Engine Displacement 350:

3.5 Liters (3498 cc)

Engine Type 350:

DOHC V6, 24 Valves

Horsepower 350:

Approx. 268 hp @ 6000 rpm

Torque 350:

Approx. 258 lb-ft @ 2400-5000 rpm

Engine Displacement 500:

5.5 Liters (5461 cc)

Engine Type 500:

DOHC V8, 32 Valves

Horsepower 500:

Approx. 382 hp @ 6000 rpm

Torque 500:

Approx. 391 lb-ft @ 2800-4800 rpm

Fuel Type:

Premium Unleaded Gasoline (91 octane or higher recommended)

Fuel Delivery:

Electronic Fuel Injection (EFI), Sequential Multi-Port Fuel Injection (MPI).

ECM Details:

ME 9.7 (for M272/M273), MS 42 (for M275) engine control modules.

🔧 Transmission

Standard Transmission:

7-speed Automatic Transmission 7G-TRONIC PLUS (722.9)

Optional Transmission:

AMG SPEEDSHIFT MCT 7-speed sport transmission (in S63/S65 AMG models).

Transmission Modes:

Comfort (C), Sport (S), Manual (M) shifting modes.

Transmission Fluid Type:

MB Spec 236.14 (e.g., Mobil ATF 134, Pentosin ATF1)

Transmission Fluid Capacity:

Approx. 9.5 - 10.5 Liters (for complete refill, actual amount depends on torque converter drain).

📐 Dimensions

Length:

Approx. 5092 mm (200.5 in) for standard wheelbase, 5226 mm (205.7 in) for long wheelbase.

Width:

Approx. 1871 mm (73.7 in)

Height:

Approx. 1473 mm (58.0 in)

Wheelbase:

Approx. 3035 mm (119.5 in) standard, 3165 mm (124.6 in) long.

Curb Weight:

Approx. 1950-2100 kg (4300-4600 lbs), depending on engine and configuration.

🛡️ Safety Features

NHTSA Rating:

Generally received 5-star ratings in frontal and side impact tests (specific ratings may vary by testing year and configuration).

IIHS Rating:

Typically awarded 'Top Safety Pick' by IIHS.

Active Safety Features:

ABS, EBD, ESP, Brake Assist (BAS), Traction Control, PRE-SAFE® occupant protection system.

Driver Assistance Optional:

DISTRONIC PLUS (adaptive cruise control), LANE KEEPING ASSIST, BLIND SPOT ASSIST, NIGHT VIEW ASSIST.

Passive Safety Features:

Multi-stage front airbags, front and rear side airbags, full-length window curtain airbags, front and rear head restraints, active front head restraints (NECK PRO).

💡 Technology Features

Infotainment System:

COMAND NTG 4.0 (Cockpit Management and Navigation Device)

Infotainment Features:

CD/DVD changer, AM/FM radio, navigation system, Bluetooth connectivity, auxiliary audio input, hard drive for music storage, SD card slot.

Standard Driver Assistance:

Traction Control (ASR), Electronic Stability Program (ESP), Brake Assist (BAS), ATTENTION ASSIST (driver fatigue detection - standard on facelift models).

Optional Driver Assistance Packages:

Driver Assistance Package (Distronic Plus, Lane Keeping Assist, Blind Spot Assist), Night View Assist, Parking Assist (PARKTRONIC).

Connectivity Options:

Bluetooth for hands-free calling and audio streaming, optional Media Interface for connecting external devices.

Lighting Technology:

Bi-Xenon headlamps with cornering illumination, LED daytime running lights, Adaptive Highbeam Assist (optional).

🔧 Maintenance

Oil Change Interval:

Typically every 10,000 miles (16,000 km) or 12 months, whichever comes first, under normal driving conditions (refer to service booklet for detailed recommendations).

Transmission Fluid Service:

Recommended at 40,000-60,000 miles (64,000-96,000 km) or as indicated by the service computer (ASSYST PLUS).

Brake Fluid Flush:

Every 2 years, regardless of mileage.

Spark Plug Replacement:

Varies by engine: e.g., M272/M273 often around 70,000-100,000 miles.

Engine Oil Specification:

MB Spec 229.5 or 229.51 (e.g., Mobil 1 0W-40, Castrol EDGE Synthetic 0W-40).

Coolant Specification:

MB Spec 325.0 or 326.0 (Antifreeze/Coolant, typically blue color).

Power Steering Fluid:

MB Spec 343.0 (Hydraulic Oil)

Common Issues W221:

AIRMATIC suspension leaks (struts, air compressor), balance shaft gear wear (M272 V6 engines), transmission conductor plate issues (722.9), HVAC blower motor resistor failure, door lock actuator failure, EIS (Electronic Ignition Switch) problems.

📚 Vehicle History

Brand Philosophy:

Mercedes-Benz is renowned for pioneering automotive safety, engineering excellence, and luxury craftsmanship.

W221 Generation:

Introduced in 2005 as a successor to the W220 S-Class, the W221 represented a significant leap in technology and design.

W221 Facelift:

A significant facelift occurred for the 2010 model year, introducing updated styling, new powertrain options, and enhanced driver assistance systems.

Production Years:

2005–2013

Manufacturing Plant:

Sindelfingen Plant, Germany.

🏆 Awards & Recognition

Common Awards:

While specific awards for the 2010 model year vary, the W221 generation consistently received accolades for its luxury, comfort, and safety from automotive publications worldwide.

Safety Organization Ratings:

High ratings from organizations like IIHS and NHTSA for its advanced safety features.