🏷️ 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 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...