Mercedes-Benz Mercedes M-Class 1997-2005

Mercedes-Benz Mercedes M-Class 1997-2005 5G-TRONIC Transmission Specifications

This document provides detailed technical specifications for the 5G-Tronic automatic transmission used in the 1997-2005 Mercedes M-Class. It includes gear ratios, torque capacity, fluid type, and maintenance intervals, offering valuable insights for owners, technicians, and enthusiasts. The 5G-Tronic transmission, known for its smooth shifting and durability, was a key feature in this generation of the M-Class. Understanding these specifications helps in diagnosing issues, performing maintenance, and ensuring optimal performance. Whether you're looking to repair, upgrade, or simply learn more about your vehicle, this guide serves as a comprehensive resource.

Updated Jan 23, 2025

Overview Specifications

This document provides detailed specifications and technical information about the 5G-Tronic transmission used in the 1997-2005 Mercedes M-Class. It is designed to assist technicians, enthusiasts, and owners in understanding the transmission's features, maintenance requirements, and performance characteristics. Use the search and navigation instructions to quickly locate specific details or browse through the sections for a comprehensive understanding of the 5G-Tronic transmission.

How to Use

Use the search bar to enter keywords related to the 5G-Tronic transmission, such as 'gear ratios' or 'fluid capacity'. Results will highlight relevant sections and subsections for quick access.

Scroll through the sections to explore major topics. Click on a section title to expand it and view subsections. Use the quick reference table for key specifications at a glance.

Key Specifications

▲

Transmission Type

5-speed automatic

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Torque Capacity

398 lb-ft (540 Nm)

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Fluid Capacity

7.5 liters (8 quarts)

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Gear Ratios

3.59:1 to 0.83:1

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Service Interval

60,000 miles (96,000 km)

Available Specifications

Transmission Design

This section covers the design and architecture of the 5G-Tronic transmission, including its construction, components, and operational principles. Learn about the transmission's layout, materials, and how it integrates with the Mercedes M-Class drivetrain.

Construction and Components

Five-speed automatic transmission with electronic control
Aluminum alloy housing for reduced weight
Torque converter with lock-up clutch
Planetary gearset for smooth shifting
Integrated valve body for hydraulic control
Sealed transmission unit for durability

Operational Principles

Adaptive shift logic for optimized performance
Electronic control unit (ECU) for precise gear changes
Hydraulic pressure regulation for smooth operation
Torque converter lock-up for improved efficiency
Manual mode for driver-controlled shifting
Fail-safe mode for limp-home functionality

Performance Specifications

This section provides detailed performance metrics for the 5G-Tronic transmission, including gear ratios, torque capacity, and fuel efficiency. Understand how the transmission enhances the driving experience in the Mercedes M-Class.

Gear Ratios

1st gear: 3.59:1
2nd gear: 2.19:1
3rd gear: 1.41:1
4th gear: 1.00:1
5th gear: 0.83:1
Reverse gear: 3.16:1

Torque and Power Handling

Maximum torque capacity: 398 lb-ft (540 Nm)
Compatible with engines up to 5.0L V8
Designed for high-performance and off-road use
Efficient power transfer with minimal losses
Durable components for long-term reliability
Optimized for both city and highway driving

Maintenance and Service

This section outlines maintenance requirements and service intervals for the 5G-Tronic transmission. Learn about fluid specifications, common issues, and troubleshooting tips to keep the transmission in optimal condition.

Fluid Specifications

Transmission fluid type: Mercedes-Benz ATF 134
Fluid capacity: 7.5 liters (8 quarts)
Fluid change interval: 60,000 miles (96,000 km)
Use of genuine fluid for optimal performance
Fluid level check procedure via dipstick
Importance of maintaining proper fluid levels

Common Issues and Solutions

Delayed shifting due to worn valve body
Rough shifts caused by low fluid levels
Transmission overheating in extreme conditions
Diagnostic trouble codes (DTCs) for fault detection
Replacement of solenoids for improved shifting
Regular inspection of transmission mounts

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Transmission Specifications

Overview

Type: 5-speed automatic transmission

Configuration: Longitudinal

Platform: Mercedes-Benz M-Class (W163)

Material: Aluminum alloy casing

Location: Rear-wheel drive or all-wheel drive configuration

Dimensions

Length: 28.5 inches (724 mm)

Width: 22.8 inches (579 mm)

Height: 18.3 inches (465 mm)

Weight: 187 lbs (85 kg)

input Shaft Diameter: 1.2 inches (30.5 mm)

Output Shaft Diameter: 1.5 inches (38.1 mm)

Fluid Capacity: 7.4 quarts (7 liters)

Materials

Casing: Aluminum alloy

Gears: Case-hardened steel

Clutch Packs: Composite friction materials

Seals: Viton rubber

Sensors: Stainless steel and plastic

Features

Shifting

Adaptive shift logic
Manual mode with tip-tronic functionality
Smooth gear transitions
Kick-down for rapid acceleration

Performance

Torque converter lock-up clutch
Wide gear ratio spread
Optimized for off-road and on-road use
Enhanced fuel efficiency

Control

Electronic control unit (ECU) integration
CAN bus communication
Self-diagnostic capabilities
Fail-safe limp-home mode

Durability

Reinforced internal components
High-temperature fluid compatibility
Sealed against dust and moisture
Corrosion-resistant materials

integration

Compatible with 4MATIC all-wheel drive
Supports traction control systems
Adapts to ESP and ABS systems
Seamless integration with engine management

Safety Features

Fail-Safes

Limp-home mode activation
Overheat protection
Fluid pressure monitoring

Electronic Protections

ECU-controlled shift limits
Torque reduction during wheel slip
Gear lockout at high speeds

Mechanical Protections

Reinforced clutch packs
Overload protection for gears
Sealed fluid system

Comfort Features

Noise Reduction

Precision-machined gears
Vibration-dampening mounts
Quiet torque converter operation

Smoothness

Adaptive shift programming
Seamless gear changes
Low-speed creep function

Convenience

Automatic park lock
Keyless shift interlock
Driver-selectable modes

Climate Adaptation

Cold-start optimization
High-temperature fluid stability
Adaptive shift patterns for altitude

Accessories

Fluids

Mercedes-Benz ATF 134
Synthetic transmission fluid
Additives for wear protection

Tools

Transmission fluid dipstick
Diagnostic scan tool
Fluid exchange pump

Upgrades

Performance shift kits
Enhanced cooling systems
Custom ECU tuning

Maintenance

Service interval: Every 40,000 miles or 48 months

Service Items

Transmission fluid and filter replacement
Inspect for leaks and wear
Check and adjust shift linkage
Test electronic control functions
Flush and replace cooling lines

Maintenance Notes: Use only approved fluids and follow torque specifications for bolts.

Warranty

Basic: Miles: 50,000
Years: 4
Coverage: Parts and labor for defects

Powertrain: Miles: 100,000
Years: 7
Coverage: Transmission components

Corrosion: Miles: Unlimited
Years: 10
Coverage: Perforation due to rust

Extended: Miles: 120,000
Years: 10
Coverage: Optional extended coverage

Production Details

Manufacturer: Mercedes-Benz AG

Manufacturing Process

Precision CNC machining
Automated assembly lines
Laser welding for casings
Quality testing under load

Quality Control: inspection: 100% component testing
Tolerances: Micron-level precision
Durability Tests: Simulated 200,000-mile cycles

Sustainability Practices

Recyclable materials
Energy-efficient production
Waste reduction initiatives

Production Metrics: Annual Output: 150,000 units
Defect Rate: Less than 0.1%
Lead Time: 4 weeks

Service Information for 5g tronic transmission Service

Maintenance and service requirements specific to this component

40,000

Replace transmission fluid and filter
Inspect for leaks and wear
Check shift linkage alignment
Test electronic control functions
Flush and replace cooling lines

Use only Mercedes-Benz-approved fluids and follow torque specifications.

80,000

Replace transmission fluid and filter
Inspect and replace worn seals
Check torque converter operation
Test shift solenoids and sensors
Perform full diagnostic scan

Special tools required for solenoid testing and calibration.

120,000

144

Replace transmission fluid and filter
Inspect and replace clutch packs if needed
Check and replace valve body components
Perform full system overhaul if necessary
Test and recalibrate ECU settings

Major service may require removal of the transmission. Ensure proper lifting equipment is used.

Common Questions

Find answers to common questions about torque specifications

Is the 5G-Tronic transmission compatible with all 1997-2005 Mercedes M-Class models?

The 5G-Tronic transmission, also known as the 722.6 transmission, is compatible with most 1997-2005 Mercedes M-Class models, including the ML320, ML430, and ML500. However, compatibility may vary depending on the engine type and drivetrain configuration. Always verify the specific model and year with your vehicle's VIN or consult a Mercedes-Benz dealer for confirmation.

What are the maintenance requirements for the 5G-Tronic transmission?

The 5G-Tronic transmission requires regular maintenance, including fluid and filter changes every 40,000 to 60,000 miles. Use only Mercedes-Benz-approved ATF fluid (e.g., MB 236.10 or 236.14). Inspect for leaks, ensure proper fluid levels, and check for error codes using a diagnostic tool. Neglecting maintenance can lead to shifting issues or transmission failure.

How do I replace the 5G-Tronic transmission in a 1997-2005 Mercedes M-Class?

Replacing the 5G-Tronic transmission involves lifting the vehicle, disconnecting the driveshaft, removing the transmission crossmember, and detaching electrical connectors and fluid lines. Use a transmission jack to safely lower the old unit and install the new one. Torque all bolts to factory specifications and refill with the correct ATF fluid. Professional assistance is recommended for this complex procedure.

What are common troubleshooting steps for 5G-Tronic transmission issues?

Common issues include harsh shifting, delayed engagement, or transmission slipping. Start by checking the ATF level and condition. Use a diagnostic scanner to read fault codes. Inspect the valve body, solenoids, and wiring harness for damage. If no issues are found, consider a transmission fluid and filter change or consult a specialist for further diagnosis.

How can I optimize the performance of my 5G-Tronic transmission?

To optimize performance, ensure regular maintenance with high-quality ATF fluid. Use a transmission tuning module or software update to improve shift responsiveness. Avoid aggressive driving and excessive towing to reduce wear. Regularly check for software updates from Mercedes-Benz to enhance transmission performance and longevity.

Factory Service Resources

Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.

Mercedes-Benz 5G-Tronic Service Manual

Coming Soon

Detailed service manual covering the 5G-Tronic transmission, including maintenance procedures, troubleshooting, and repair instructions.

Technical Service Bulletin for 5G-Tronic Transmission

Coming Soon

Official Mercedes-Benz TSB addressing common issues and updates for the 5G-Tronic transmission in 1997-2005 M-Class vehicles.

5G-Tronic Transmission Parts Catalog

Coming Soon

Comprehensive catalog of OEM and aftermarket parts for the 5G-Tronic transmission, including part numbers and compatibility details.

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Technical Information

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