🏷️ Basic Information

Make:

Mercedes-Benz

Model:

S-Class

Model Code:

W221

Year:

2007

Generation Name:

Fifth Generation (W221)

Generation Start Year:

2005

Generation End Year:

2013

Chassis Code:

W221

👋 Introduction

Segment:

Full-Size Luxury Sedan

Predecessor:

Mercedes-Benz S-Class (W220)

Competitors:

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

Innovation:

Pioneered technologies like PRE-SAFE®, DISTRONIC PLUS, and advanced driver assistance systems.

Design Philosophy:

Elegant, timeless design with a focus on sophisticated luxury and advanced engineering.

📋 Manual Details

Coverage Scope:

All Models & All Repairs A-Z

Estimated Page Count:

Extensive (typically 1,500+ pages for complete factory service manuals)

Type:

Factory Service and Repair Manual

Language:

English

Format:

Digital (likely PDF, may vary)

📖 Manual Coverage

Powertrain:

Engine mechanicals (M272, M273, M156), engine management, fuel system, exhaust system, transmission (7G-TRONIC automatic), drivetrain.

Chassis:

Suspension (AIRMATIC, Active Body Control), steering system (Sensotronic, hydraulic), braking system (ABS, ESP, SBC - if applicable earlier models but standard features), wheels, tires.

Electrical:

12V electrical system, battery, alternator, starter, lighting, instruments, infotainment system (COMAND), navigation, climate control, seat adjustments, power windows, mirrors, door locks, Keyless-Go.

Bodywork:

Body panels, doors, hood, trunk, bumpers, interior trim, glass, seals, heating, ventilation, and air conditioning (HVAC).

Safety Systems:

Airbags, seatbelts, ISOFIX, ADAPTIVE BRAKE, ESP, ABS, DISTRONIC PLUS, PARKTRONIC, LANE KEEPING ASSIST, BLIND SPOT ASSIST, NIGHT VIEW ASSIST.

Maintenance:

Scheduled maintenance, oil changes, filter replacements, fluid checks and top-offs, brake pad/rotor replacement, spark plug replacement, belt replacement, diagnostic checks.

Diagnostics:

Troubleshooting guides, fault code diagnosis (using STAR diagnostic tools), symptom-based troubleshooting, wiring diagrams, component testing procedures.

Repair:

Component removal and installation, engine rebuild procedures, transmission overhaul, suspension component replacement, brake system repair, electrical component repair, body panel repair.

Calibration And Adjustment:

Sensor calibration (e.g., steering angle sensor, ride height sensors), door alignment, key programming, control unit programming and adaptation.

Depth:

Complete Factory Level. Covers everything from basic fluid changes to complex electronic module diagnostics and complete engine/transmission rebuilds. Essential for dealership-level technicians and serious DIY enthusiasts.

📊 Manual Specifications

File Type:

Likely PDF; optimized for digital access and searchability.

Searchability:

High (with OCR and indexed content).

Clarity:

High-resolution diagrams, illustrations, and photographs.

Binding:

N/A (for digital format, but print version would typically be perfect bound or spiral bound).

Paper Quality:

N/A (for digital format, but original manuals often used high-quality, durable paper).

⚙️ Engine Specifications

Engine Codes 2007:

M272 (3.5L V6), M273 (5.5L V8), M156 (6.2L V8 - S63 AMG)

Displacement M272:

3498 cc

Horsepower M272:

272 hp @ 6000 rpm (approx.)

Torque M272:

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

Displacement M273:

5461 cc

Horsepower M273:

382 hp @ 6000 rpm (approx.)

Torque M273:

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

Displacement M156:

6208 cc

Horsepower M156:

518 hp @ 6800 rpm (approx.)

Torque M156:

479 lb-ft @ 5200 rpm (approx.)

Engine Layout:

V6 and V8 configurations

Engine Technology:

All-aluminum construction, DOHC with variable valve timing (VVT).

Fuel Delivery:

Sequential Multi-Point Fuel Injection (MPI) or Direct Injection (depending on specific variant).

Recommended Fuel:

Premium Unleaded Gasoline (91 octane or higher).

🔧 Transmission

Transmission Type:

7-speed automatic (7G-TRONIC)

Drivetrain:

Rear-wheel drive (RWD) standard; 4MATIC all-wheel drive optional.

Optional Drivetrain:

4MATIC All-Wheel Drive

Transmission Modes:

Comfort (C) and Sport (S) modes.

📐 Dimensions

Length:

Approx. 199.7 inches (5072 mm)

Width:

Approx. 73.7 inches (1872 mm)

Height:

Approx. 58.2 inches (1478 mm)

Wheelbase:

Approx. 119.7 inches (3040 mm)

Curb Weight:

Approx. 4,000 - 4,500 lbs (1814 - 2041 kg) depending on engine and options.

🛡️ Safety Features

NHTSA Overall Rating:

Likely 5-Star (typical for S-Class models of this era, though specific 2007 ratings may vary).

IIHS Rating:

Likely 'Good' in relevant categories.

Active Safety Systems:

ABS, EBD, ESP, BAS (Brake Assist System), Adaptive Brake Lights, PRE-SAFE® system.

Driver Assistance Packages:

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

Airbags:

Front airbags, side airbags, front and rear head curtain airbags, optional rear side airbags.

Seatbelts:

3-point inertia-reel seatbelts with pre-tensioners and force limiters, Active Head Restraints (NECK-PRO).

💡 Technology Features

Infotainment System:

COMAND APS (Cockpit Management and Navigation).

Infotainment Features:

CD/DVD player, AM/FM radio, navigation system, Bluetooth connectivity, optional Harman Kardon surround sound system.

Adas Features:

Standard PRE-SAFE®; optional DISTRONIC PLUS, PARKTRONIC, rearview camera, KEYLESS-GO.

Connectivity Options:

Bluetooth for hands-free calling and audio streaming.

Convenience Features:

Power adjustable front and rear seats with memory, heated and ventilated seats, multi-zone climate control, power sunroof, power trunk closer.

🔧 Maintenance

Oil Change Interval:

Typically every 10,000 miles or 12 months, whichever comes first (refer to manual for specific engine type).

Major Service Intervals:

Spark plugs (e.g., 60,000-100,000 miles), transmission fluid (e.g., 40,000-60,000 miles or per severe service schedule), coolant, brake fluid.

Engine Oil Specification:

Mobil 1 Formula M 5W-40 (MB-Approval 229.5) or equivalent.

Transmission Fluid Specification:

MB 236.14 (for 7G-TRONIC transmissions).

Brake Fluid Specification:

DOT 4 Plus (MB 331.0).

Coolant Specification:

MB 325.0 (Glysantin G48 or equivalent - typically a blue/green silicate-containing coolant).

Common Issues M272 M273:

Intake manifold flap runner failures, balance shaft wear (on M272s with earlier production dates), oil cooler leaks, O-ring failures on various engine components.

Common Issues Electronics:

COMAND system glitches, Airmatic suspension compressor failures, SAM module issues, CAN bus communication errors.

Common Issues General:

Window regulator failures, door lock actuator issues, HVAC blower motor resistors.

📚 Vehicle History

Manufacturer History:

Mercedes-Benz, founded in 1926, is renowned for its luxury vehicles, engineering excellence, and pioneering automotive safety and technology.

W221 Introduction:

The W221 S-Class debuted in 2005 as a successor to the W220, bringing a bolder design, more advanced technology, and improved safety features.

W221 Design Changes:

More muscular styling, prominent grille, LED lighting elements, significantly updated interior with COMAND infotainment system.

Manufacturing Locations:

Primary assembly in Sindelfingen, Germany.

🏆 Awards & Recognition

Automotive Awards:

Frequently recognized for luxury, comfort, and technological innovation by automotive publications (e.g., Car and Driver, MotorTrend - though specific 2007 awards should be verified).

Reliability Ratings:

Varies by specific model year and maintenance history; typically average to above average for luxury vehicles of its era, with potential for higher maintenance costs.

Safety Certifications:

Meets or exceeds all relevant national and international safety standards.