Mercedes-Benz Mercedes GLK 2008-2015 7G-TRONIC Transmission Specifications
This document provides a detailed overview of the 7G-Tronic transmission specifications for the 2008-2015 Mercedes GLK. It includes technical details such as gear ratios, torque capacity, shift patterns, and fluid requirements. The 7G-Tronic, also known as the 7-speed automatic transmission, is designed for smooth shifting, improved fuel efficiency, and enhanced driving performance. This guide is invaluable for owners, technicians, and enthusiasts seeking to understand the transmission's capabilities, maintenance needs, and compatibility with the GLK model. Whether you're performing routine maintenance, diagnosing issues, or considering upgrades, this resource offers essential insights into one of Mercedes-Benz's most advanced transmissions.
Overview Specifications
This document provides detailed specifications and technical information about the 7G-TRONIC transmission used in the 2008-2015 Mercedes GLK. It is designed to assist users in understanding the transmission's features, performance, and maintenance requirements. Use the search and navigation instructions to quickly find relevant information. The document is divided into sections covering key aspects of the transmission, with subsections detailing specific technical points.
How to Use
Use the search functionality by entering keywords related to the transmission, such as 'gear ratios' or 'fluid capacity'. This will help you quickly locate specific information within the document.
Navigate through the document by scrolling through the sections or using the table of contents. Each section is clearly labeled, and subsections provide detailed information on specific topics.
Key Specifications
Number of Gears
7
Maximum Torque
700 Nm
Fluid Capacity
7.5 liters
Fluid Type
ATF 134 FE
Shift Logic
Adaptive
Available Specifications
Transmission Overview
This section provides a high-level overview of the 7G-TRONIC transmission, including its design, features, and benefits. It also covers the transmission's compatibility with the Mercedes GLK and its role in enhancing vehicle performance.
Transmission Overview
This section provides a high-level overview of the 7G-TRONIC transmission, including its design, features, and benefits. It also covers the transmission's compatibility with the Mercedes GLK and its role in enhancing vehicle performance.
Design and Features
- 7-speed automatic transmission
- Adaptive shift logic for optimized performance
- Wet clutch system for smooth gear changes
- Integrated torque converter for improved efficiency
- Compatible with rear-wheel and all-wheel drive systems
- Designed for durability and long-term reliability
Performance Benefits
- Enhanced fuel efficiency compared to older models
- Reduced shift times for quicker acceleration
- Improved driving comfort with seamless gear transitions
- Adaptive to driving conditions for optimal performance
- Supports manual shift mode for sportier driving
- Low maintenance requirements due to robust design
Technical Specifications
This section delves into the technical details of the 7G-TRONIC transmission, including gear ratios, torque capacity, and fluid requirements. It is essential for understanding the transmission's capabilities and maintenance needs.
Technical Specifications
This section delves into the technical details of the 7G-TRONIC transmission, including gear ratios, torque capacity, and fluid requirements. It is essential for understanding the transmission's capabilities and maintenance needs.
Gear Ratios
- 1st gear: 4.38:1
- 2nd gear: 2.86:1
- 3rd gear: 1.92:1
- 4th gear: 1.37:1
- 5th gear: 1.00:1
- 6th gear: 0.82:1
- 7th gear: 0.73:1
- Reverse gear: 3.42:1
Torque and Fluid Capacity
- Maximum torque capacity: 700 Nm
- Transmission fluid capacity: 7.5 liters
- Recommended fluid type: Mercedes-Benz ATF 134 FE
- Fluid change interval: Every 60,000 miles or 5 years
- Oil pan design: Integrated with filter for easy maintenance
- Cooling system: Integrated transmission cooler
Maintenance and Troubleshooting
This section provides guidance on maintaining the 7G-TRONIC transmission and troubleshooting common issues. It includes tips for fluid changes, filter replacements, and diagnosing problems.
Maintenance and Troubleshooting
This section provides guidance on maintaining the 7G-TRONIC transmission and troubleshooting common issues. It includes tips for fluid changes, filter replacements, and diagnosing problems.
Routine Maintenance
- Regularly check transmission fluid level and condition
- Replace transmission fluid and filter at recommended intervals
- Inspect for leaks around the transmission housing
- Ensure proper operation of the transmission cooler
- Monitor for unusual noises or vibrations during operation
- Use only manufacturer-recommended fluids and parts
Common Issues and Solutions
- Delayed or harsh shifting: Check fluid level and condition
- Transmission slipping: Inspect clutch packs and solenoids
- Warning lights: Use diagnostic tools to identify fault codes
- Fluid leaks: Replace seals and gaskets as needed
- Overheating: Ensure proper cooling system function
- Unresponsive manual mode: Check shift linkage and sensors
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Transmission Specifications
Overview
- Type
- Automatic Transmission
- Configuration
- 7-speed
- Platform
- Mercedes-Benz 722.9
- Material
- Aluminum alloy casing
- Location
- Longitudinal, rear-wheel drive or all-wheel drive
Dimensions
- Length
- 28.5 inches (724 mm)
- Width
- 22.8 inches (579 mm)
- Height
- 18.1 inches (460 mm)
- Weight
- 187 lbs (85 kg)
- input Shaft Diameter
- 1.2 inches (30 mm)
- Output Shaft Diameter
- 1.4 inches (35 mm)
- Fluid Capacity
- 7.4 quarts (7 liters)
Materials
- Casing
- Aluminum alloy
- Gears
- Hardened steel
- Clutch Packs
- Composite friction materials
- Seals
- Synthetic rubber
- Sensors
- Plastic and copper
Features
- Shifting
-
- Adaptive shift logic
- Manual mode with paddle shifters
- Smooth gear transitions
- Kick-down function
- Efficiency
-
- Reduced internal friction
- Optimized gear ratios
- Eco mode for fuel savings
- Torque converter lock-up
- Performance
-
- Quick response times
- Sport mode for aggressive shifting
- High torque capacity
- Dynamic gear selection
- Durability
-
- Reinforced internal components
- High-temperature resistance
- Long service intervals
- Robust design for heavy loads
- integration
-
- Seamless integration with Mercedes-Benz electronics
- Compatibility with 4MATIC all-wheel drive
- Adaptive cruise control support
- Start-stop system compatibility
Safety Features
- Fail-Safes
-
- Limp-home mode
- Overheat protection
- Fluid pressure monitoring
- Electronic Controls
-
- Transmission control module (TCM)
- Speed sensor monitoring
- Gear position verification
Comfort Features
- Noise Reduction
-
- Precision-engineered gears
- Vibration dampening
- Quiet operation
- Smoothness
-
- Adaptive shift patterns
- Torque converter smoothing
- Low-speed creep
- Convenience
-
- Automatic park lock
- Hill-start assist
- Seamless integration with driver assistance systems
Accessories
- Upgrades
-
- Performance transmission fluid
- Aftermarket shift paddles
- Enhanced cooling systems
- Tools
-
- Transmission fluid pump
- Diagnostic scanner
- Torque wrench set
- Replacement Parts
-
- Filter kit
- Gasket set
- Solenoid pack
Maintenance
- Service interval
- Every 40,000 miles or 4 years
- Service Items
-
- Transmission fluid change
- Filter replacement
- Seal inspection
- Solenoid testing
- Software updates
- Maintenance Notes
- Use only Mercedes-Benz-approved fluids and parts for optimal performance.
Warranty
- Basic
- Miles: 50,000Years: 4Coverage: Parts and labor
- Powertrain
- Miles: 100,000Years: 7Coverage: Transmission components
- Extended
- Miles: 120,000Years: 10Coverage: Additional components with certified service
- Terms
- Warranty void if non-approved parts or fluids are used.
Production Details
- Manufacturer
- Mercedes-Benz AG
- Manufacturing Process
-
- Precision CNC machining
- Automated assembly
- Laser welding
- Quality Control
- Testing: Durability testing, Temperature cycling, Vibration analysisStandards: ISO 9001 certified
- Sustainability
-
- Recyclable materials
- Energy-efficient production
- Waste reduction initiatives
- Production Metrics
- Units Per Year: 500,000Defect Rate: 0.01%Lead Time: 6 weeks
Service Information for 7g tronic transmission Service
Maintenance and service requirements specific to this component
- Transmission fluid replacement
- Filter replacement
- Seal inspection
- Solenoid testing
- Software update
Use only Mercedes-Benz-approved transmission fluid.
- Comprehensive fluid flush
- Valve body inspection
- Clutch pack wear check
- Torque converter testing
- Diagnostic scan for error codes
Specialized tools required for valve body inspection.
- Transmission overhaul
- Replace worn components
- Full system diagnostics
- Performance testing
- Fluid and filter replacement
Major service requires certified technician and specialized equipment.
Common Questions
Find answers to common questions about torque specifications
Q1 Is the 7G-Tronic transmission compatible with other Mercedes-Benz models?
Is the 7G-Tronic transmission compatible with other Mercedes-Benz models?
The 7G-Tronic transmission, used in the 2008-2015 Mercedes GLK, is compatible with several other Mercedes-Benz models, including the C-Class, E-Class, and S-Class from the same era. It is designed for rear-wheel-drive and all-wheel-drive configurations. However, compatibility depends on the specific model year and engine type. Always verify with a Mercedes-Benz dealer or technical guide before attempting cross-model installations.
Q2 What are the maintenance requirements for the 7G-Tronic transmission?
What are the maintenance requirements for the 7G-Tronic transmission?
The 7G-Tronic transmission requires regular maintenance to ensure optimal performance. Mercedes-Benz recommends a transmission fluid and filter change every 40,000 to 60,000 miles. Additionally, inspect the transmission for leaks, wear, and software updates. Use only approved Mercedes-Benz transmission fluid (ATF 134) to avoid damage. Regular diagnostics using specialized tools are also advised to detect early issues.
Q3 How do I replace the 7G-Tronic transmission in a Mercedes GLK?
How do I replace the 7G-Tronic transmission in a Mercedes GLK?
Replacing the 7G-Tronic transmission involves several steps: 1) Disconnect the battery and remove the transmission pan to drain fluid. 2) Detach the driveshaft, wiring harness, and cooling lines. 3) Support the transmission with a jack and remove mounting bolts. 4) Carefully lower and remove the transmission. Installation is the reverse process, ensuring proper alignment and torque specifications. Always refer to the service manual for detailed instructions.
Q4 What are common troubleshooting steps for the 7G-Tronic transmission?
What are common troubleshooting steps for the 7G-Tronic transmission?
Common issues with the 7G-Tronic transmission include rough shifting, delayed engagement, or warning lights. Start by checking the transmission fluid level and condition. Use a diagnostic scanner to read fault codes. Inspect the wiring harness and connectors for damage. If issues persist, consider a software update or professional inspection. Regular maintenance can prevent many of these problems.
Q5 How can I optimize the performance of the 7G-Tronic transmission?
How can I optimize the performance of the 7G-Tronic transmission?
To optimize the 7G-Tronic transmission, ensure regular fluid changes using Mercedes-Benz-approved ATF 134. Use a diagnostic tool to reset adaptation values after maintenance. Avoid aggressive driving and ensure the transmission is properly warmed up before heavy use. Consider a software update from a Mercedes-Benz dealer to improve shifting behavior and overall performance.
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 7G-Tronic Service Manual
Coming SoonDetailed service manual covering maintenance, repair, and troubleshooting for the 7G-Tronic transmission.
Technical Service Bulletin for 7G-Tronic Updates
Coming SoonLatest updates and fixes for the 7G-Tronic transmission, including software improvements and common issues.
7G-Tronic Parts and Accessories Catalog
Coming SoonComprehensive catalog of genuine parts and accessories for the 7G-Tronic transmission.
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Technical Information
- All specifications, including torque values, fluid capacities, and maintenance procedures, should be verified against your vehicle's factory service manual.
- Vehicle specifications and procedures may vary by model year, trim level, and region.
- Always follow the manufacturer's recommended procedures and safety precautions.
- Working on vehicles can be dangerous. Always take proper safety precautions and use appropriate safety equipment.
- If you're unsure about any procedure, consult a qualified professional mechanic.
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