🏷️ Basic Information Identification Make: Mercedes-Benz Model: GL450 Year: 2009 Codes Chassis Code: X164 Engine Code: M272 (typically, verify with VIN) 👋 Introduction Market Position Segment: Full-Size Luxury SUV Target Audience: Owners seeking to perform their own maintenance and repairs, independent repair shops, automotive enthusiasts. Competitive Analysis Competitors 2009: BMW X5, Audi Q7, Lexus LX 570, Cadillac Escalade, Lincoln Navigator Key Features Vehicle Strengths: Comfortable ride, spacious interior, powerful V8 engine (in some variants, but GL450 has V6), advanced safety features, Mercedes-Benz prestige. Manual Value Proposition: Provides official, accurate diagnostic and repair procedures, saving significant costs compared to dealership service. Essential for DIY maintenance and in-depth troubleshooting. 📋 Manual Details Coverage Areas Primary Coverage: Service, Repair, Maintenance, Diagnostics, Troubleshooting Secondary Coverage: Electrical Schematics, Wiring Diagrams, Specifications, Procedures Page Count Estimated Pages: Extensive (Software-based, not fixed page count) Manual Type Type: Official Service and Repair Manual Software Language Language: English Format Format: Software (Digital) 📖 Manual Coverage Systems Covered Powertrain: Engine (M272 V6), Transmission (7G-TRONIC automatic), Drivetrain (4MATIC all-wheel drive) Chassis: Suspension (AirMATIC), Brakes (ABS, ESP), Steering, Wheels and Tires Electrical: Engine Control Module (ECM), Transmission Control Module (TCM), Body Control Module (BCM), Lighting, Audio, Navigation, Climate Control, Power Accessories Body And Interior: Body Panels, Doors, Seats, Restraints (Airbags), HVAC System, Interior Trim Procedures Included Maintenance: Scheduled Maintenance, Fluid Changes (Oil, Coolant, Brake Fluid, Transmission Fluid), Filter Replacements, Lubrication Diagnostics: OBD-II Diagnostics, DTC (Diagnostic Trouble Code) interpretation, Component Testing, Sensor Data Analysis Repair: Engine Component Replacement (spark plugs, coils, sensors), Transmission Service, Brake System Overhaul, Suspension Component Replacement, Electrical Component Repair, Bodywork Repairs Troubleshooting: Systematic fault finding for common and uncommon issues, guided diagnostic trees Technical Depth Depth: Comprehensive: From basic fluid checks and filter replacements to in-depth engine rebuild procedures, transmission overhaul, and complex electrical system diagnostics and repair. 📊 Manual Specifications File Format Digital Format: Executable Software, potentially with PDF components. Searchable text, interactive diagrams. Print Quality Printability: Printable pages for offline use and specific procedures. Binding Type Binding: N/A (Software) Paper Type Paper Quality: N/A (Software) Compatibility Operating Systems: Windows XP, Vista, 7 (typically; verify specific software requirements) ⚙️ Engine Specifications Primary Engine Engine Type: Naturally Aspirated V6 Displacement: 4.6 Liters (4633 cc) Engine Code Details: M272 DE 46 Performance Horsepower: 335 hp @ 6000 rpm (approximate, may vary slightly) Torque: 325 lb-ft @ 3500 rpm (approximate, may vary slightly) Fuel System Injection Type: Electronic Fuel Injection (EFI), Sequential Multi-Port Fuel Injection Fuel Type: Premium Unleaded Gasoline (91 Octane or higher recommended) Engine Management ECU Type: ME 9.7 (Manufacturer specific) 🔧 Transmission Standard Transmission Type: 7-Speed Automatic Transmission Code: 7G-TRONIC (NAG2) Optional Optional Transmission: N/A for GL450 in 2009 Features Drivetrain: 4MATIC All-Wheel Drive (Permanent) Gear Ratios: Detailed in manual (typically includes overdrive gears) Fluid Specifications Transmission Fluid Type: MB-Approved ATF (e.g., MB 236.14 for 7G-TRONIC) 📐 Dimensions Exterior Length: 200.7 inches Width: 76.5 inches Height: 72.4 inches Wheelbase: 116.0 inches Weights Curb Weight: 5,093 lbs Gross Vehicle Weight Rating: 6,570 lbs Cargo Cargo Volume Behind 3Rd Row: 14.3 cu ft Cargo Volume Behind 2Nd Row: 42.4 cu ft Cargo Volume Behind 1St Row: 77.0 cu ft 🛡️ Safety Features Ratings NHTSA Overall Rating: 5-Star (Frontal and Side Impact - check specific year ratings) IIHS Ratings: Good (Frontal Offset, Side Impact - check specific year ratings) Active Features Brake Assist: Standard (BAS - Brake Assist System) Electronic Stability Control: Standard (ESP - Electronic Stability Program) Traction Control: Standard (ASR - Acceleration Slip Regulation) Passive Features Airbags: Dual Frontal, Front Side-Impact, Side Curtain (3rd Row) Standard Seatbelts: 3-point seatbelts with pretensioners and force limiters, active head restraints. 💡 Technology Features Infotainment Head Unit: COMAND APS (Cockpit Management and Data System) with optional navigation. Audio System: Harman Kardon LOGIC 7 surround sound system (optional). Driver Assistance Adaptive Cruise Control: DISTRONIC PLUS (optional) Parking Assistance: PARKTRONIC (parking sensors front and rear), rearview camera (optional). Connectivity Bluetooth: Bluetooth connectivity for hands-free calling (with optional module). Auxiliary Input: Standard AUX input for audio devices. 🔧 Maintenance Service Intervals Oil Change Interval: Variable (typically every 10,000 miles or 12 months, based on 'Active Service System' (ASSYST) and driving conditions) Major Service A: Typically around 20,000 miles: Includes inspection of various components, fluid checks, cabin filter replacement. Major Service B: Typically around 40,000 miles: Includes Service A items plus brake fluid change, potentially spark plug replacement (at higher intervals), and more thorough inspections. Transmission Service: Typically around 60,000 miles or as indicated by vehicle service computer. Manual specifies procedure for fluid and filter change. Fluid Specifications Engine Oil Type: Synthetic SAE 0W-40, MB-Approval 229.5 Coolant Type: MB-Approved Antifreeze/Coolant (e.g., MB 325.0 or 326.0 - typically blue concentrate) Brake Fluid Type: DOT 4 Plus (MB-Approval 331.0) Known Issues Common Issues M272: Timing chain wear/stretch (especially on earlier M272 engines), intake manifold flap issues, balance shaft wear....