🏷️ Basic Information

Make:

Mercedes-Benz

Model:

G550

Year:

2009

👋 Introduction

Vehicle Segment:

Luxury SUV, Off-Road Vehicle

Target Demographic:

Affluent individuals and families seeking robust off-road capability combined with premium luxury and performance.

Key Competitors 2009:

Land Rover Range Rover, Lexus LX 570, Toyota Land Cruiser, Cadillac Escalade, BMW X5.

Off Road Capability:

Renowned for its body-on-frame construction, solid rear axle, locking differentials, and robust suspension system providing exceptional off-road prowess.

Luxury Appointments:

Premium interior materials, advanced technology, comfortable seating, and a sophisticated ride quality for a luxury vehicle.

Official Licensing:

Officially licensed Mercedes-Benz product, ensuring accuracy and adherence to factory specifications.

Digital Accessibility:

Instant access and download capability, offering a modern alternative to bulky printed manuals.

📋 Manual Details

Manual Type:

Service and Repair Manual Software

Language:

English

Format:

Software (Digital)

Page Count Estimate:

Thousands (typical for comprehensive factory-level software)

Content Type:

Official Factory Service Manual

📖 Manual Coverage

Engine Mechanical:

Complete coverage of the 5.5L V8 engine, including cylinder head, block, crankshaft, pistons, connecting rods, camshafts, timing system, lubrication system, and cooling system.

Engine Management:

Detailed diagnostics and repair procedures for the Engine Control Module (ECM), fuel injection system (CIS-E, Sequential Multiport Fuel Injection - SMPI), ignition system, emissions control systems (OBD-II, catalytic converters, O2 sensors), and exhaust system.

Transmission Automatic:

Comprehensive coverage of the 7-speed automatic transmission (7G-TRONIC), including valve body, torque converter, electronic controls, gear ratios, clutch packs, and hydraulic system.

Drivetrain 4Wd:

In-depth information on the permanent all-wheel-drive system, including center differential, transfer case, front and rear axle assemblies, CV joints, driveshafts, and locking differentials.

Suspension Steering:

Detailed procedures for the independent front and solid rear axle suspension, including shock absorbers, springs, control arms, bushings, stabilizer bars, power steering system, steering column, and steering gear.

Brakes:

Complete coverage of the Anti-lock Braking System (ABS), Electronic Stability Program (ESP), brake calipers, rotors, pads, brake lines, hydraulic unit, and parking brake system.

Electrical System:

Extensive coverage of the entire electrical system, including the battery, alternator, starter, fuse boxes, wiring diagrams for all circuits, lighting system (headlights, taillights, interior), horn, and power accessories.

Body Chassis:

Procedures for body panel repair, doors, windows, sunroof, interior trim, bumpers, fenders, hood, tailgate, and chassis component alignment.

Climate Control:

Detailed diagnostics and repair of the automatic climate control system, including HVAC unit, blower motor, refrigerant system, AC compressor, evaporator, condenser, and control modules.

Infotainment Navigation:

Information on the COMAND infotainment system, navigation, radio, CD changer, speaker system, and telematics.

Maintenance:

Scheduled maintenance intervals, oil changes, filter replacements, fluid level checks and top-offs, belt inspection and replacement, spark plug replacement, and general inspections.

Troubleshooting:

Systematic diagnostic procedures for identifying and resolving common and uncommon issues across all vehicle systems, including fault code interpretation.

Repair:

Step-by-step repair instructions for component replacement, adjustments, and reassembly for all major and minor vehicle systems.

Diagnostics:

Detailed diagnostic charts, flowcharts, and explanations of diagnostic trouble codes (DTCs) related to engine, transmission, ABS, ESP, and other electronic control units.

Wiring Diagrams:

Comprehensive and detailed electrical wiring diagrams for every circuit in the vehicle, including component locations and connector pinouts.

Specifications:

Accurate torque specifications, clearances, fluid capacities, electrical values, and measurement tolerances for all components.

Engine Rebuild:

Complete procedures for engine disassembly, inspection, machining, and reassembly, including specifications for critical engine components.

Transmission Overhaul:

Detailed instructions for the complete overhaul and rebuilding of the 7G-TRONIC automatic transmission.

Suspension Alignment:

Specifications and procedures for wheel alignment, suspension component adjustments, and driveline measurements.

📊 Manual Specifications

Software Type:

Proprietary Diagnostic & Repair Software Platform

Searchability:

Fully searchable text and indexed content for quick information retrieval.

Multimedia:

May include diagrams, illustrations, and potentially video clips for complex procedures.

Updates:

Typically static for a specific model year, but some software versions may receive minor updates.

⚙️ Engine Specifications

Engine Code:

M273 (Mercedes-Benz V8)

Engine Type:

Naturally Aspirated V8

Displacement:

5.5 liters (5439 cc)

Bore X Stroke:

98.0 mm x 90.5 mm

Compression Ratio:

10.7:1

Horsepower:

382 hp @ 6000 rpm

Torque:

391 lb-ft @ 2800 rpm

Fuel Type:

Premium Unleaded Gasoline (91 octane recommended)

Fuel Delivery:

Sequential Multiport Fuel Injection (SMPI)

Engine Management System:

ME 9.7 (Bosch)

🔧 Transmission

Transmission Type:

7-speed Automatic (7G-TRONIC)

Gear Ratios:

4.375 / 2.857 / 1.921 / 1.370 / 1.000 / 0.820 / 0.729 (Forward); 3.416 (Reverse)

Selectable Modes:

Comfort (C) and Sport (S) modes.

Transfer Case:

2-speed transfer case with planetary gear center differential and lockable rear differential (optional).

Transmission Fluid Type:

MB Specification 236.10 (ATF)

📐 Dimensions

Length:

189.1 inches (4803 mm)

Width:

76.0 inches (1930 mm)

Height:

79.1 inches (2009 mm)

Wheelbase:

112.2 inches (2850 mm)

Curb Weight:

Approx. 5,130 lbs (2327 kg)

Gross Vehicle Weight Rating:

Approx. 6,570 lbs (2980 kg)

Towing Capacity:

7,000 lbs (3175 kg) (when properly equipped)

🛡️ Safety Features

NHTSA Rollover Resistance:

4/5 stars (for 2009 model year)

ABS:

Standard Anti-lock Braking System

Esp:

Standard Electronic Stability Program

Traction Control:

Standard Traction Control System (ASR)

Hill Start Assist:

Standard Hill-Start Assist (HSA)

Airbags:

Front airbags, front side-impact airbags, full-length side curtain airbags.

Seat Belts:

3-point inertia-reel seat belts with pre-tensioners and force limiters.

💡 Technology Features

System Name:

COMAND (Cockpit Management and Navigation)

Features:

Includes navigation system, AM/FM radio, CD player, harman/kardon® LOGIC 7® surround sound system, auxiliary audio input.

Cruise Control:

Standard Cruise Control

Parking Assist:

Optional parking sensors (front and rear).

Bluetooth:

Available Bluetooth® connectivity for hands-free calling.

🔧 Maintenance

Oil Change Interval:

Every 10,000 miles or 12 months, whichever comes first (under normal driving conditions).

Major Service Interval:

Variable, dependent on model year and specific service campaigns, often around 30,000 miles for spark plugs and fluid changes.

Engine Oil Type:

MB Specification 229.5 (Synthetic Engine Oil, SAE 0W-40 or 5W-40)

Coolant Type:

MB Specification 325.0 (Antifreeze/Coolant)

Brake Fluid Type:

DOT 4 Plus

Power Steering Fluid Type:

MB Specification 236.3 (ATF)

Common Wear Items:

Brake pads and rotors, front suspension bushings, universal joints, exhaust components.

Engine M273 Specifics:

Potential for timing chain wear over high mileage, ignition coil failure, and oil leaks from valve covers or oil pan gaskets.

Transmission 7G Tronic Specifics:

Occasional issues with the electronic conductor plate, solenoid issues, or torque converter problems at higher mileage.

📚 Vehicle History

Mercedes Benz Heritage:

Founded in 1926, Mercedes-Benz is renowned for pioneering automotive engineering, luxury, and safety innovations.

G Wagon Lineage:

The G-Class, originating in 1979 as a military vehicle, has evolved into a highly capable and luxurious off-road SUV, maintaining its distinctive boxy silhouette and rugged construction.

G550 Introduction:

The G550 designation typically signifies the V8 engine variant, introduced to offer a more powerful and refined experience compared to earlier models or different engine options.

Manufacturing Location:

Graz, Austria (by Magna Steyr)

🏆 Awards & Recognition

G Class Awards:

Consistently recognized for off-road capability and durability by various automotive publications and off-road enthusiast groups.