Mercedes-Benz Mercedes CLS 2004-2010 7G-TRONIC Transmission Specifications
This document provides detailed technical specifications for the 7G-TRONIC automatic transmission used in the 2004-2010 Mercedes-Benz CLS models. The 7G-TRONIC, Mercedes-Benz's first 7-speed automatic transmission, offers improved fuel efficiency, smoother gear shifts, and enhanced driving dynamics. Specifications covered include gear ratios, torque capacity, fluid type and capacity, shift patterns, and control module details. This information is invaluable for owners, technicians, and enthusiasts seeking to understand the transmission's operation, perform maintenance, or diagnose issues. The data also supports performance tuning and compatibility assessments for replacement parts. Whether you're servicing your vehicle, researching upgrades, or simply want to know more about your CLS's transmission, this comprehensive specification guide serves as an essential technical resource.
Overview Specifications
This document provides detailed technical specifications and information about the 7G-TRONIC transmission used in Mercedes-Benz CLS models from 2004 to 2010. The 7G-TRONIC is a 7-speed automatic transmission known for its smooth shifting and efficiency. This guide is designed to help users understand the key features, technical details, and maintenance aspects of this transmission. Whether you are a car enthusiast, mechanic, or owner, this document will serve as a comprehensive resource for all things related to the 7G-TRONIC transmission.
How to Use
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Navigate through the document by scrolling through the sections or using the table of contents. Each section is clearly labeled and contains subsections with detailed information. Use the quick reference section for a summary of key specifications.
Key Specifications
Number of Gears
7
Torque Capacity
740 Nm
Fluid Capacity
7.5 liters
Fluid Type
MB 236.14
Weight
85 kg
Available Specifications
Technical Specifications
This section covers the core technical details of the 7G-TRONIC transmission, including gear ratios, torque capacity, and fluid requirements. Understanding these specifications is essential for performance tuning and maintenance.
Technical Specifications
This section covers the core technical details of the 7G-TRONIC transmission, including gear ratios, torque capacity, and fluid requirements. Understanding these specifications is essential for performance tuning and maintenance.
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
Torque Capacity
- Maximum Torque: 740 Nm (546 lb-ft)
- Designed for high-performance engines
- Handles V6 and V8 engines efficiently
- Optimized for smooth power delivery
Fluid Requirements
- Transmission Fluid Type: MB 236.14
- Fluid Capacity: 7.5 liters
- Fluid Change Interval: 60,000 miles
- Use only approved Mercedes-Benz fluids
Performance Features
The 7G-TRONIC transmission is equipped with advanced features that enhance driving performance and efficiency. This section highlights the key performance attributes and technologies integrated into the transmission.
Performance Features
The 7G-TRONIC transmission is equipped with advanced features that enhance driving performance and efficiency. This section highlights the key performance attributes and technologies integrated into the transmission.
Shift Logic
- Adaptive shift logic for smooth transitions
- Sport mode for quicker shifts
- Manual mode for driver control
- Eco mode for improved fuel efficiency
Efficiency
- Reduced internal friction for better efficiency
- Optimized gear ratios for fuel economy
- Lightweight construction for reduced weight
- Improved thermal management
Durability
- High-quality materials for longevity
- Robust design for high torque applications
- Advanced cooling system for thermal stability
- Regular maintenance ensures extended lifespan
Maintenance and Service
Proper maintenance is crucial for the longevity and performance of the 7G-TRONIC transmission. This section provides guidelines on routine maintenance, common issues, and service intervals.
Maintenance and Service
Proper maintenance is crucial for the longevity and performance of the 7G-TRONIC transmission. This section provides guidelines on routine maintenance, common issues, and service intervals.
Routine Maintenance
- Check fluid levels every 10,000 miles
- Inspect for leaks regularly
- Replace transmission fluid every 60,000 miles
- Ensure proper fluid type is used
Common Issues
- Delayed shifting
- Transmission fluid leaks
- Rough shifting when cold
- Check engine light related to transmission
Service Intervals
- Fluid change: 60,000 miles
- Filter replacement: 60,000 miles
- Inspection: Every 20,000 miles
- Software updates: As recommended by dealer
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Transmission Specifications
Overview
- Type
- 7-speed automatic transmission
- Configuration
- Longitudinal
- Platform
- Mercedes-Benz W219 CLS-Class
- Material
- Aluminum alloy casing
- Location
- Rear-wheel drive (RWD) and all-wheel drive (4MATIC) configurations
Dimensions
- Length
- 28.5 inches (724 mm)
- Width
- 22.8 inches (579 mm)
- Height
- 18.9 inches (480 mm)
- Weight
- 187 lbs (85 kg)
- input Shaft Diameter
- 1.18 inches (30 mm)
- Output Shaft Diameter
- 1.57 inches (40 mm)
- Fluid Capacity
- 7.4 quarts (7 liters)
Materials
- Casing
- Aluminum alloy
- Gears
- Case-hardened steel
- Clutch Packs
- Composite friction materials
- Valve Body
- Aluminum with electro-hydraulic control
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 clutch
- Performance
-
- Quick shift response
- Sport mode for dynamic driving
- High torque capacity (up to 737 lb-ft)
- Seamless downshifting
- Durability
-
- Reinforced internal components
- High-temperature resistance
- Long service intervals
- Robust cooling system
- integration
-
- Compatible with Mercedes-Benz COMAND system
- Integrated diagnostic system
- Adaptive to driving conditions
- Compatible with start-stop technology
Safety Features
- Fail-Safes
-
- Limp-home mode
- Overheat protection
- Emergency neutral position
- Monitoring
-
- Real-time fluid level monitoring
- Temperature sensors
- Pressure sensors
- Protection
-
- Anti-shock system
- Overload protection
- Sealed components to prevent contamination
Comfort Features
- Noise Reduction
-
- Precision-engineered gears
- Vibration dampening
- Quiet operation
- Smoothness
-
- Adaptive shift points
- Seamless gear changes
- Reduced jerk during shifts
- Convenience
-
- Automatic park engagement
- Hill-start assist
- Creep function
- Customization
-
- Driver-selectable modes
- Adaptive learning
- Personalized shift patterns
Accessories
- Upgrades
-
- Performance transmission fluid
- Enhanced cooling kits
- Custom shift paddles
- Tools
-
- Diagnostic scan tool
- Fluid exchange kit
- Transmission jack adapter
- Maintenance
-
- Filter and gasket kit
- Fluid pan replacement
- Seal kit
Maintenance
- Service interval
- Every 40,000 miles or 48 months
- Service Items
-
- Transmission fluid replacement
- Filter replacement
- Seal inspection
- Valve body check
- Diagnostic scan
- Maintenance Notes
- Use only Mercedes-Benz-approved transmission fluid for optimal performance.
Warranty
- Basic
- Miles: 50,000Years: 4Coverage: Parts and labor
- Powertrain
- Miles: 100,000Years: 7Coverage: Transmission components
- Extended
- Miles: 120,000Years: 10Coverage: Limited coverage for major components
- Corrosion
- Miles: UnlimitedYears: 12Coverage: Casing and external components
Production Details
- Manufacturer
- Mercedes-Benz AG
- Manufacturing Process
-
- Precision CNC machining
- Automated assembly
- Laser welding
- Quality Control
- Testing: Durability testing, Performance benchmarking, Environmental stress testingStandards: ISO 9001 certified, Mercedes-Benz internal standards, End-of-line diagnostics
- Sustainability
-
- Recyclable materials
- Energy-efficient production
- Waste reduction initiatives
- Production Metrics
- Annual Output: 500,000 unitsDefect Rate: Less than 0.1%Lead Time: 4 weeks
Service Information for 7g tronic transmission Service
Maintenance and service requirements specific to this component
- Transmission fluid replacement
- Filter replacement
- Seal inspection
- Valve body check
- Diagnostic scan
Use only Mercedes-Benz-approved transmission fluid.
- Fluid and filter replacement
- Clutch pack inspection
- Torque converter check
- System pressure test
Inspect for wear and tear on internal components.
- Complete fluid flush
- Valve body overhaul
- Clutch pack replacement if needed
- Performance testing
Major service may require specialized tools and expertise.
Common Questions
Find answers to common questions about torque specifications
Q1 What vehicles are compatible with the 7G-Tronic transmission from 2004-2010?
What vehicles are compatible with the 7G-Tronic transmission from 2004-2010?
The 7G-Tronic transmission, introduced by Mercedes-Benz in 2003, is compatible with several models from 2004 to 2010, including the CLS-Class (W219), E-Class (W211), S-Class (W221), and others. It supports engines ranging from V6 to V8 configurations. Always verify compatibility using your vehicle's VIN, as specific models and engine types may require unique adaptations or software updates.
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. This includes changing the transmission fluid and filter every 60,000 to 80,000 miles, depending on driving conditions. Additionally, inspect for leaks, ensure the transmission control module is updated, and address any error codes promptly. Proper maintenance prevents premature wear and extends the transmission's lifespan.
Q3 How do I replace the 7G-Tronic transmission in a 2004-2010 Mercedes CLS?
How do I replace the 7G-Tronic transmission in a 2004-2010 Mercedes CLS?
Replacing the 7G-Tronic transmission involves several steps: disconnect the battery, remove the transmission crossmember, detach the driveshaft and torque converter, and lower the transmission. Installation requires reversing the process, ensuring proper alignment and torque specifications. Use a diagnostic tool to reset the transmission control module and verify functionality. Professional assistance is recommended for this complex procedure.
Q4 What are common troubleshooting steps for the 7G-Tronic transmission?
What are common troubleshooting steps for the 7G-Tronic transmission?
Common issues include rough shifting, delayed engagement, or transmission slipping. Start by checking the transmission fluid level and condition. Scan for error codes using a diagnostic tool to identify faults in sensors or the control module. Inspect for leaks or damaged components. If issues persist, consult a professional for a detailed diagnosis and repair.
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 performance, ensure regular maintenance, including fluid and filter changes. Use only approved transmission fluid specified by Mercedes-Benz. Update the transmission control module software to the latest version. Avoid aggressive driving and allow the transmission to warm up in cold weather. Consider installing a transmission cooler if towing or driving in extreme conditions.
Factory Service Resources
Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.
7G-Tronic Transmission Service Manual
Coming SoonDetailed service manual covering maintenance, repair, and troubleshooting for the 7G-Tronic transmission in Mercedes vehicles from 2004-2010.
Technical Service Bulletin for 7G-Tronic Updates
Coming SoonLatest technical updates and software improvements for the 7G-Tronic transmission to enhance performance and reliability.
7G-Tronic Parts and Accessories Guide
Coming SoonComprehensive guide listing compatible parts and accessories for the 7G-Tronic transmission, including filters, fluids, and repair kits.
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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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