🏷️ Basic Information Identification Make: Mercedes-Benz Model: S550 Year: 2007 Codes Chassis Code: W221 👋 Introduction Market Position Market Position: Flagship luxury sedan, representing the pinnacle of Mercedes-Benz engineering and comfort. Competes directly with other ultra-luxury vehicles from brands like BMW (7 Series), Audi (A8), Lexus (LS), and Porsche (Panamera). Competitive Analysis Competitive Analysis: The 2007 S550 (W221) offered advanced technology, superior ride quality with its innovative suspension systems (ABC/AIRMATIC), and a powerful yet refined V8 engine. Its key selling points were comfort, safety, and sophisticated features, positioning it as a benchmark for luxury sedans of its era. Key Features Key Features: Comfort-oriented chassis, powerful M273 engine, advanced driver assistance systems, sophisticated interior appointments, premium materials, state-of-the-art COMAND infotainment, innovative suspension technologies. 📋 Manual Details Coverage Areas Coverage Areas: Engine, Transmission, Drivetrain, Suspension, Steering, Brakes, HVAC, Electrical Systems, Body & Chassis, Diagnostics, Maintenance, Troubleshooting, Repair Procedures Page Count Page Count: Extensive (Software typically contains thousands of pages equivalent to print manuals) Manual Type Manual Type: Official Factory Service & Repair Manual Language Language: English Format Format: Software (Digital, likely PDF or proprietary application) 📖 Manual Coverage Systems Covered Systems Covered: Engine mechanical and electrical systems (M273 V8 engine), 7-G-TRONIC automatic transmission, 4MATIC all-wheel drive (if applicable), Active Body Control (ABC) suspension, AIRMATIC air suspension, DIRECT CONTROL suspension, electro-hydraulic power steering, ABS, ESP, brake system components, climate control (THERMATIC/THERMOTRONIC), COMAND infotainment system, lighting systems, CAN bus communication, wiring diagrams, body control modules, instrument cluster, SRS (Airbag) system, security systems, comfort systems (seats, windows, sunroof), keyless-go, parking assist, navigation system. Procedures Included Procedures Included: Routine maintenance (oil changes, filter replacements, fluid checks), scheduled servicing, component diagnostics, troubleshooting guides, repair and replacement procedures for all major systems, torque specifications, wiring harness routing, software updates and diagnostics, component testing, calibration procedures, body panel repair, interior trim removal and installation, emission control system servicing. Technical Depth Technical Depth: Comprehensive: Covers everything from basic preventive maintenance and fluid checks to in-depth diagnostic procedures, component-level troubleshooting, and complete mechanical and electrical system overhauls. Includes detailed step-by-step instructions, diagnostic trouble codes (DTCs) with explanations, component testing specifications, and factory-recommended repair techniques. 📊 Manual Specifications File Format File Format: Digital Software (typically searchable PDF or proprietary application with hyperlinked navigation) Print Quality Print Quality: N/A (Digital format, but typically high-resolution diagrams and text) Binding Type Binding Type: N/A (Digital format) Paper Type Paper Type: N/A (Digital format) ⚙️ Engine Specifications Primary Engine Engine Code: M273 E55 (5.5L) Engine Type: Naturally Aspirated V8 Displacement: 5461 cc (5.5 Liters) Bore X Stroke: 97.0 mm x 90.5 mm Compression Ratio: 10.0:1 Valvetrain: SOHC 4 Valves per Cylinder (32 valves total) with Variable Valve Timing (VVT) Performance Horsepower: 382 hp @ 6000 rpm Torque: 391 lb-ft @ 2800-4800 rpm Fuel System Fuel Induction: Sequential Multi-port Fuel Injection (SFI) Fuel Type: Premium Unleaded Gasoline (91 octane or higher recommended) Engine Oil Type: Synthetic SAE 0W-40 or 5W-40 meeting Mercedes-Benz MB 229.5 specification Engine Oil Capacity Engine Oil Capacity: 8.5 quarts (8.0 Liters) with filter Cooling System Coolant Type: Mercedes-Benz approved coolant (e.g., ZEREX G-05 or equivalent) mixed 50/50 with distilled water Coolant Capacity: Approximately 11.5 quarts (10.9 Liters) 🔧 Transmission Standard Transmission Type: 7-G-TRONIC Automatic Transmission Number Of Gears: 7 Forward, 1 Reverse Transmission Fluid Type: MB Spec 236.14 Automatic Transmission Fluid (ATF), e.g., Mobil ATF 134 Transmission Fluid Capacity: Approximately 9.5 quarts (9.0 Liters) for torque converter refill Features Features: Tiptronic manual shifting capability, Comfort, Sport, and Manual modes, Predictive Shift Control. 📐 Dimensions Exterior Length: 200.0 inches (5080 mm) Width: 73.7 inches (1872 mm) Height: 58.2 inches (1478 mm) Wheelbase: 116.7 inches (2965 mm) Weights Curb Weight: Approximately 4400-4500 lbs (2000-2040 kg) Gross Vehicle Weight Rating Gvwr: Approximately 5700-5800 lbs (2585-2630 kg) Cargo Trunk Capacity: Approximately 16.7 cubic feet (473 Liters) Wheels Tires Standard Wheel Size: 17-inch or 18-inch alloy wheels Standard Tire Size: 255/50R17 or 255/40R18 Bolt Pattern: 5 x 112 mm Center Bore: 66.6 mm 🛡️ Safety Features Ratings NHTSA Front Crash Test Rating: 5-Star (Overall, Driver, Passenger) IIHS Top Safety Pick: Yes (typically awarded based on available testing) Passive Features Airbags: Front dual-stage airbags, front side-impact airbags, rear side-impact airbags, full-length side curtain airbags (front and rear), front knee airbags. Seat Belts: 3-point inertia-reel seat belts with pretensioners and force limiters, Active Head Restraints (NECK-PRO). Child Seat Anchors: LATCH (Lower Anchors and Tethers for CHildren) system in rear outboard seating positions. Active Features Braking System: Anti-lock Braking System (ABS) with Brake Assist (BAS), Electronic Stability Program (ESP). Driver Assistance: Adaptive Cruise Control (DISTRONIC PLUS), PRE-SAFE® anticipatory safety system, Blind Spot Assist, Lane Keeping Assist (optional), Night View Assist (optional), Parking Assist (PARKTRONIC). 💡 Technology Features Infotainment Infotainment System: COMAND (Cockpit Management and Navigation) system with a 7-inch display, AM/FM/CD/DVD player, HDD navigation, Bluetooth connectivity, and optional Harman Kardon surround...