🏷️ Basic Information

Make:

Mercedes-Benz

Model:

GL450

Year:

2007

Chassis Code:

X164

👋 Introduction

Vehicle Segment:

Full-size Luxury SUV

Key Competitors:

BMW X5, Audi Q7, Lexus LX, Cadillac Escalade, Land Rover LR3/LR4

Unique Selling Points:

Premium interior materials, advanced safety features, powerful V8 engine, sophisticated suspension (AIRMATIC), spacious seating for seven passengers.

Benefit To Owner:

Empowers owners and independent mechanics with accurate, factory-level repair information to maintain and repair the vehicle effectively, saving time and money.

📋 Manual Details

Systems Covered:

Engine, Transmission, Drivetrain, Suspension, Steering, Brakes, Electrical System, Climate Control, Bodywork, Chassis, Diagnostic Procedures, Maintenance Schedules, Troubleshooting

Estimated Pages:

1500+

Type:

Official Factory Service & Repair Manual Software

Language:

English

Format:

Software/Digital (Likely PDF-based for online delivery)

📖 Manual Coverage

Engine Mechanical:

Detailed overhaul procedures for M273 V8 engine, including cylinder head, block, crankshaft, pistons, connecting rods, timing system, lubrication system, cooling system, fuel injection, and emission control systems.

Engine Electrical:

Engine control module (ECM) diagnosis, ignition system, fuel delivery, starter system, alternator, sensor operations (MAF, O2, crankshaft position, camshaft position), and wiring diagrams.

Transmission:

722.9 7G-TRONIC automatic transmission overhaul, fluid service, torque converter, valve body, electronic control unit (TCU) diagnosis, and mechatronics unit.

Drivetrain:

All-Wheel Drive (4MATIC) system, differential service, transfer case operation, driveshaft and CV joint maintenance, and wheel bearing replacement.

Suspension:

Front and rear independent suspension systems, shock absorber/strut replacement, spring service, control arm and ball joint replacement, and air suspension (AIRMATIC) component troubleshooting and repair.

Steering:

Hydraulic power steering system diagnosis, steering rack repair, power steering pump service, and steering column adjustments.

Brakes:

Front and rear disc brake system service, brake pad and rotor replacement, hydraulic system bleeding, ABS/BAS/ESP component testing and repair, and parking brake mechanisms.

Electrical Lighting:

Headlight, taillight, interior lighting, and accessory lighting service. Bulb replacement procedures and electrical diagnostics for lighting circuits.

Climate Control:

HVAC system operation, refrigerant charging, compressor replacement, evaporator and condenser service, blower motor, climate control module diagnosis, and cabin air filter replacement.

Body Interior:

Door panel removal, seat adjustment and removal, interior trim panel replacement, sunroof operation and repair, and tailgate mechanisms.

Body Exterior:

Front and rear bumper removal and installation, fender replacement, hood and tailgate alignment, door and mirror replacement, and paint repair guidelines.

Safety Systems:

Airbag system component identification, SRS module diagnosis, seat belt pre-tensioner replacement, and safety sensor calibration.

Infotainment Navigation:

COMAND system operation, radio and speaker troubleshooting, navigation system updates, and telematics (TELE AID) diagnosis.

Preventative Maintenance:

Detailed schedules for oil changes, filter replacements (oil, air, cabin, fuel), spark plug replacement, coolant flushes, brake fluid changes, and transmission fluid service.

Diagnostics Troubleshooting:

Systematic diagnostic trees, fault code interpretation (OBD-II), component testing procedures, and common problem diagnosis for electrical and mechanical systems.

Repair Overhaul:

Step-by-step instructions for engine, transmission, suspension, brake, and drivetrain component removal, disassembly, inspection, repair, and reassembly.

Component Replacement:

Detailed guides for replacing critical components such as fuel pumps, radiators, alternators, starters, mass airflow sensors, oxygen sensors, brake calipers, and suspension arms.

Calibration Reset:

Procedures for resetting service indicators, recalibrating steering angle sensors, and other electronic system resets after component replacement.

Depth:

Comprehensive. Covers from basic scheduled maintenance and fluid changes to complete engine and transmission overhauls, advanced diagnostics, and component-level repair.

📊 Manual Specifications

Software Requirements:

Requires compatible operating system (e.g., Windows) and software to open/run the digital manual.

Digital Resolution:

High-resolution digital images and diagrams, suitable for on-screen viewing and printing.

Binding:

N/A (Digital Software)

Paper Type:

N/A (Digital Software)

⚙️ Engine Specifications

Engine Code:

M273.923

Engine Type:

4.6L (4663cc) Naturally Aspirated V8

Horsepower:

335 hp @ 6000 rpm

Torque:

339 lb-ft (460 Nm) @ 2700-5000 rpm

Fuel Delivery:

Electronic Fuel Injection (EFI) with Sequential Port Injection

Fuel Type:

Premium Unleaded Gasoline (91+ octane recommended)

ECM Type:

ME 9.7 Engine Control Module

Coolant Type:

MB 325.0 / 326.0 (Glysantin G48 or equivalent - typically blue/green)

Oil Type:

MB 229.5 (e.g., Mobil 1 0W-40, Castrol Syntec 0W-40)

Oil Capacity:

8.5 Liters (8.9 US Quarts)

🔧 Transmission

Transmission Type:

7-speed Automatic (7G-TRONIC)

Transmission Code:

722.9

Optional Transmission:

N/A (7-speed was standard)

Drive Modes:

Comfort (C), Sport (S), Manual (M) shifting modes

Transmission Fluid Type:

MB 236.14 (ATF LT 71141)

Transmission Fluid Capacity:

Approx. 9.5 Liters (for total fill; 7.5L for dry fill)

📐 Dimensions

Length:

198.6 inches (5045 mm)

Width:

76.6 inches (1945 mm)

Height:

72.4 inches (1838 mm)

Wheelbase:

115.2 inches (2926 mm)

Curb Weight:

5,115 lbs (2,320 kg)

Gross Vehicle Weight Rating:

6,810 lbs (3,089 kg)

Cargo Volume Behind 3Rd Row:

14.3 cu ft (405 L)

Cargo Volume Behind 2Nd Row:

42.3 cu ft (1200 L)

Cargo Volume Behind 1St Row:

83.3 cu ft (2360 L)

🛡️ Safety Features

NHTSA Rollover Rating:

4 out of 5 stars

Standard Active Safety:

ABS, Traction Control (ASR), Electronic Stability Program (ESP), ALL-SEASON TRACTION CONTROL (4-ETS)

Optional Driver Assistance:

Distronic Plus (Adaptive Cruise Control), Bi-Xenon Headlamps with Active Curve Illumination

Standard Passive Safety:

Front airbags, front side-impact airbags, 3-row side curtain airbags, front active head restraints

💡 Technology Features

Infotainment System:

COMAND (Cockpit Management and Navigation) System

Audio Features:

AM/FM radio, CD player, optional Harman Kardon surround sound system, auxiliary audio input.

Available Adas:

Distronic Plus (adaptive cruise control), Parking Assist (Parktronic)

Connectivity Options:

Optional Bluetooth connectivity for hands-free calling.

🔧 Maintenance

Oil Change Interval:

Variable (based on 'Assyst' service computer), typically around 10,000 miles or 1 year.

Transmission Fluid Service:

Initial: 60,000 miles. Subsequent: 40,000-60,000 miles recommended (especially for the 722.9 transmission).

Brake Fluid Flush:

Every 2 years (regardless of mileage).

Spark Plug Replacement:

Typically around 100,000 miles for iridium-tipped plugs.

Air Filter Replacement:

Every 30,000 miles or as needed based on driving conditions.

Cabin Filter Replacement:

Every 15,000-20,000 miles or annually.

Coolant Capacity:

Approx. 11.5 Liters (12.2 US Quarts)

Power Steering Fluid:

MB 236.3 (Pentosin CHF 11 S or equivalent)

Common Problems:

AIRMATIC suspension leaks/failures, balance shaft gear wear (on some M272/M273 engines, though less prevalent on later M273), transmission conductor plate issues (722.9), oil cooler leaks, front suspension component wear (control arms, ball joints), catalytic converter issues.

📚 Vehicle History

Manufacturer Focus:

Luxury vehicles, performance, safety, and innovation for over a century.

Introduction Of Gl Class:

The GL-Class (X164) was introduced for the 2007 model year as Mercedes-Benz's first full-size, truck-based luxury SUV, designed to compete with established players in the segment.

Manufacturing Location:

Tuscaloosa, Alabama, USA

🏆 Awards & Recognition

Automotive Journalism Reviews:

Often praised for its luxurious ride, quiet cabin, and powerful engine, though sometimes criticized for its less agile handling compared to unibody SUVs and its complex interior electronics.