🏷️ Basic Information Identification Make: Mercedes-Benz Model: S-Class Model Variant: S350 Year: 2006 Codes Chassis Code: W221 👋 Introduction Market Position Segment: Full-size Luxury Sedan Target Audience: Affluent consumers seeking comfort, technology, and prestige Competitive Analysis Key Competitors: BMW 7 Series, Audi A8, Lexus LS, Porsche Panamera (later models) Key Features Design: Elegant and imposing exterior, spacious and meticulously crafted interior Powertrain: Smooth and refined V6 engine, advanced automatic transmission Technology: COMAND infotainment, advanced driver assistance systems (optional), AIRMATIC suspension 📋 Manual Details Coverage Areas Primary Coverage: Operation, Maintenance, Safety, Features Secondary Coverage: Troubleshooting basics, Specifications Page Count Estimated Page Count: Approximately 300-400 pages (typical for this model and era) Manual Type Type: Owner's Manual Language Language: English Format Format: Digital PDF 📖 Manual Coverage Systems Covered Powertrain: Engine (M272 V6), Transmission (7G-TRONIC) Chassis: Brakes, Suspension (AIRMATIC), Steering Electrical: Lighting, Instrument Cluster, Power Accessories, COMAND Infotainment Comfort And Convenience: Climate Control, Seats, Locks, Security, Sunroof Safety: Airbags, Seatbelts, ISOFIX, ABS, ESP, Tire Pressure Monitoring Procedures Included Basic Maintenance: Checking fluid levels (oil, coolant, washer fluid), Tire pressure adjustment, Wiper blade replacement Operation: Starting/stopping engine, Gear selection, Using climate control, Operating infotainment system, Adjusting seats and mirrors Security: Keyless-Go operation, Central locking, Anti-theft alarm system Emergency: Emergency trunk release, Changing a flat tire (if applicable, often relies on run-flats), Jump starting (with caution) Customer Assistance: Contacting dealer, Reporting safety defects (US-specific) Technical Depth Depth: Comprehensive owner-level operation and maintenance, basic troubleshooting 📊 Manual Specifications File Format Compatibility: Requires PDF reader (Acrobat Reader, Foxit, etc.), Compatible with all PDF-enabled devices Print Quality Quality: High-resolution, clear text and diagrams Binding Type Binding: Not Applicable (Digital Format) Paper Type Paper Type: Not Applicable (Digital Format) ⚙️ Engine Specifications Primary Engine Engine Code: M272 Configuration: 3.5L V6 Valvetrain: DOHC, 24 valves, variable valve timing (VVT) Performance Horsepower: 268 hp @ 6000 rpm Torque: 258 lb-ft @ 3200-4500 rpm Fuel System Injection Type: Electronic Fuel Injection (EFI) with sequential port injection Fuel Requirement: Premium Unleaded Gasoline (91 octane or higher) Engine Compartment Oil Capacity: Approximately 8.5 quarts (8.0 liters) with filter change (Refer to manual for exact specification) Coolant Capacity: Approximately 10.0 quarts (9.5 liters) (Refer to manual for exact specification) Air Filter Part Number: Typically A2720940004 or equivalent (Verify with VIN) Engine Oil Specification: MB 229.5 or MB 229.51 (Synthetic) 🔧 Transmission Standard Transmission Type: 7G-TRONIC (7-speed automatic) Drive Wheels: Rear-Wheel Drive (RWD) standard, 4MATIC All-Wheel Drive (AWD) optional Features Transmission Features: Tiptronic (manual shifting mode), Comfort/Sport modes Fluid Capacity Transmission Fluid Capacity: Approximately 9.0 quarts (8.5 liters) (Refer to manual for exact specification) Fluid Specification Transmission Fluid Type: MB 236.14 (ATF) 📐 Dimensions Exterior Length: Approximately 200.0 inches (5080 mm) Width: Approximately 73.7 inches (1872 mm) Height: Approximately 58.0 inches (1473 mm) Weights Curb Weight: Approximately 4100-4300 lbs (1860-1950 kg) depending on configuration Gross Vehicle Weight Rating: Approximately 5512 lbs (2500 kg) (Refer to VIN plate) 🛡️ Safety Features Ratings NHTSA Front Impact: 5-star (Driver and Passenger) (Typical for W221 chassis) IIHS Side Impact: Good (Typical for W221 chassis) Active Features Brake Assist System: Brake Assist (BAS) Electronic Stability Control: Electronic Stability Program (ESP) Traction Control: Acceleration Skid Control (ASR) Tire Pressure Monitoring: Tire Pressure Monitoring System (TPMS) Passive Features Airbag System: Front, front side, rear side, and window airbags Seatbelts: 3-point inertia-reel seatbelts with belt tensioners and force limiters Child Seat Anchors: ISOFIX/ISOFix anchoring points 💡 Technology Features Infotainment Primary System: COMAND APS (Cockpit Management and Navigation) Infotainment Features: Navigation, AM/FM Radio, CD/DVD player, optional Harman Kardon sound system Connectivity: Optional Bluetooth integration, voice control Driver Assistance Adaptive Cruise Control: DISTRONIC PLUS (Optional) Parking Assistance: Front and rear parking sensors (PARKTRONIC), optional rearview camera Lighting Technology: Bi-Xenon headlamps with active curve illumination, LED taillights Comfort Features Climate Control: Multi-zone automatic climate control (THERMOTRONIC) Seating Features: Multi-contour power-adjustable front seats with heating and ventilation (optional), memory functions 🔧 Maintenance Service Intervals Oil Change Interval: Variable (Service A/B), typically 10,000-15,000 miles or 1 year, based on driving conditions and oil quality. Major Service Interval: Around 30,000-40,000 miles for spark plug replacement, transmission fluid service, and other checks. Fluid Specifications Brake Fluid Specification: DOT 4 Plus (MB 331.0) Power Steering Fluid Specification: MB 343.0 or CHF 11S (Refer to manual) Known Issues Common Issue 1: Air suspension (AIRMATIC) leaks or compressor failures Common Issue 2: M272 engine balance shaft wear (affecting timing and performance, typically diagnosed by check engine light and rough running) Common Issue 3: Oil leaks from valve cover gaskets or oil cooler seals Common Issue 4: Electronic system glitches (COMAND, climate control, etc.) 📚 Vehicle History Brand Heritage Brand Essence: Luxury, engineering excellence, safety innovation Model Evolution Chassis Generation: W221 generation (introduced for 2006 model year) Predecessor: W220 S-Class Key Innovations W221: PRE-SAFE® anticipatory occupant protection, DISTRONIC PLUS (optional), COMAND APS infotainment Production...