Mercedes-Benz Mercedes B-Class 2005-2011 7G-DCT Transmission Specifications
This document provides detailed technical specifications for the 7G-DCT (7-speed Dual Clutch Transmission) used in Mercedes B-Class vehicles from 2005 to 2011. It includes information on gear ratios, torque capacity, fluid requirements, and maintenance intervals. The specifications are essential for understanding the transmission's performance, ensuring proper maintenance, and diagnosing issues. This resource is valuable for mechanics, enthusiasts, and owners looking to optimize their vehicle's transmission system or perform repairs. The data is sourced from official Mercedes-Benz service manuals and technical documents, ensuring accuracy and reliability.
Overview Specifications
This document provides detailed specifications and technical information about the 7G-DCT (7-speed Dual Clutch Transmission) used in Mercedes B-Class models from 2005 to 2011. It includes sections on transmission design, performance, maintenance, and troubleshooting. Use this guide to understand the features, operation, and care of the 7G-DCT transmission. The 'How To' section explains how to search and navigate the document efficiently.
How to Use
Use the search function to quickly locate specific terms or topics within the document. Enter keywords related to the 7G-DCT transmission, such as 'gearbox design' or 'maintenance tips,' to find relevant sections.
Navigate through the document using the table of contents or section headings. Each major section is divided into subsections for easier access to specific details about the 7G-DCT transmission.
Key Specifications
Transmission Type
7-Speed Dual Clutch
Gear Ratios
7 forward, 1 reverse
Shift Time
100 milliseconds
Maximum Torque
350 Nm
Weight
85 kg
Available Specifications
Transmission Design
This section covers the engineering and design aspects of the 7G-DCT transmission, including its dual-clutch mechanism, gear arrangement, and integration with Mercedes B-Class models.
Transmission Design
This section covers the engineering and design aspects of the 7G-DCT transmission, including its dual-clutch mechanism, gear arrangement, and integration with Mercedes B-Class models.
Dual-Clutch Mechanism
- Hydraulically controlled dual-clutch system
- Odd and even gears on separate clutches
- Seamless gear shifts with minimal power loss
- Compact design for efficient packaging
- Enhanced durability with advanced materials
- Optimized for high torque applications
Gear Arrangement
- 7 forward gears and 1 reverse gear
- Helical-cut gears for smooth operation
- Precision-machined gear components
- Low-friction bearings for improved efficiency
- Adaptive gear ratios for varied driving conditions
Performance Features
Explore the performance characteristics of the 7G-DCT transmission, including acceleration, fuel efficiency, and driving dynamics.
Performance Features
Explore the performance characteristics of the 7G-DCT transmission, including acceleration, fuel efficiency, and driving dynamics.
Acceleration and Responsiveness
- Ultra-fast gear shifts in milliseconds
- Enhanced throttle response
- Improved launch control functionality
- Sport mode for aggressive driving
- Adaptive shift patterns based on driving style
Fuel Efficiency
- Reduced fuel consumption with optimized gear ratios
- Eco mode for lower emissions
- Lightweight construction for better mileage
- Efficient power transfer with minimal energy loss
Maintenance and Care
Learn about the maintenance requirements and best practices for ensuring the longevity and reliability of the 7G-DCT transmission.
Maintenance and Care
Learn about the maintenance requirements and best practices for ensuring the longevity and reliability of the 7G-DCT transmission.
Routine Maintenance
- Regular fluid checks and replacements
- Inspection of clutch wear and tear
- Software updates for optimal performance
- Cleaning of transmission components
- Monitoring of hydraulic system pressure
Common Issues and Solutions
- Addressing gear shift delays
- Fixing hydraulic system leaks
- Resolving software glitches
- Replacing worn clutch plates
- Diagnosing sensor malfunctions
Search Specifications
Search by specification name, value, or description
Type to search through torque specifications. Results will appear below as you type.
Transmission Specifications
Overview
- Type
- Dual-Clutch Transmission
- Configuration
- 7-speed
- Platform
- Mercedes-Benz MFA
- Material
- Aluminum alloy casing
- Location
- Front-wheel drive
Dimensions
- Length
- 22.8 inches (579 mm)
- Width
- 18.5 inches (470 mm)
- Height
- 14.2 inches (360 mm)
- Weight
- 187 lbs (85 kg)
- input Shaft Length
- 12.6 inches (320 mm)
- Output Shaft Length
- 15.7 inches (400 mm)
- Fluid Capacity
- 7.4 quarts (7 liters)
Materials
- Casing
- Aluminum alloy
- Gears
- Hardened steel
- Clutch Packs
- Carbon fiber and steel
- Seals
- Synthetic rubber
- Sensors
- Stainless steel and plastic
Features
- Performance
-
- Quick shift times (< 0.2 seconds)
- Adaptive shifting algorithms
- Launch control capability
- Efficiency
-
- Reduced friction components
- Optimized gear ratios
- Auto start-stop compatibility
- Driving Modes
-
- Eco mode
- Sport mode
- Manual mode
- integration
-
- CAN bus communication
- Electronic control unit (ECU)
- Compatibility with Mercedes-Benz drive systems
- Safety
-
- Gear position sensors
- Overheat protection
- Fail-safe mode
Safety Features
- Protection Systems
-
- Overheat protection
- Overpressure protection
- Monitoring
-
- Temperature sensors
- Pressure sensors
- Emergency Features
-
- Fail-safe mode
- Manual override
Comfort Features
- Shift Quality
-
- Smooth gear transitions
- Adaptive shift patterns
- Noise Reduction
-
- Precision-engineered gears
- Sound-dampening casing
- Convenience
-
- Auto start-stop
- Hill-start assist
- Customization
-
- Adjustable shift points
- Driver mode selection
Accessories
- Mounting
-
- Transmission mounts
- Bracket kits
- Cooling
-
- Transmission cooler
- Coolant lines
- Electrical
-
- Wiring harness
- Sensors kit
Maintenance
- Service interval
- 40,000 miles or 4 years
- Service Items
-
- Fluid change
- Filter replacement
- Sensor checks
- Seal inspection
- Software updates
- Maintenance Notes
- Use only Mercedes-Benz approved transmission fluid
Warranty
- Standard Warranty
- Miles: 50,000Years: 4Coverage: Components and labor
- Powertrain Warranty
- Miles: 100,000Years: 7Coverage: Major transmission components
- Extended Warranty
- Miles: 150,000Years: 10Coverage: Full transmission system
- Warranty Terms
- Valid only with certified Mercedes-Benz service
Production Details
- Manufacturer
- Mercedes-Benz
- Manufacturing Process
-
- Precision CNC machining
- Automated assembly
- Laser alignment
- Quality Control
- Testing: Endurance testing, Temperature cyclinginspection: Dimensional accuracy, Material integrity
- Sustainability Practices
-
- Recycled aluminum usage
- Low-emission manufacturing
- Production Metrics
- Units Per Year: 50,000Defect Rate: 0.01%
Service Information for 7g dct transmission Service
Maintenance and service requirements specific to this component
- Transmission fluid change
- Filter replacement
- Sensor inspection
- Seal checks
- Software updates
Use only Mercedes-Benz approved transmission fluid
- Full transmission inspection
- Clutch pack evaluation
- Cooling system check
- Control unit diagnostics
Requires specialized diagnostic equipment
- Complete fluid flush
- Clutch pack replacement
- Seal replacement
- Full system recalibration
Recommended to replace all wear components
Common Questions
Find answers to common questions about torque specifications
Q1 Is the 7G-DCT transmission compatible with all 2005-2011 Mercedes B-Class models?
Is the 7G-DCT transmission compatible with all 2005-2011 Mercedes B-Class models?
The 7G-DCT (7-speed Dual Clutch Transmission) is compatible with select 2005-2011 Mercedes B-Class models, specifically those with gasoline engines and certain diesel variants. It is essential to verify the vehicle's VIN and engine type before installation, as compatibility varies. The transmission is designed for models with front-wheel drive and specific torque requirements. Consult the official Mercedes-Benz technical guide for precise compatibility details.
Q2 What are the maintenance requirements for the 7G-DCT transmission?
What are the maintenance requirements for the 7G-DCT transmission?
The 7G-DCT transmission requires regular maintenance to ensure optimal performance. This includes fluid changes every 60,000 miles or 5 years, whichever comes first. Inspect the transmission for leaks, worn seals, and clutch wear during service intervals. Use only Mercedes-Benz-approved transmission fluid and follow the manufacturer's guidelines. Regular software updates may also be necessary to address performance or shifting issues. Adhering to the maintenance schedule extends the transmission's lifespan.
Q3 How is the 7G-DCT transmission installed or replaced in a 2005-2011 Mercedes B-Class?
How is the 7G-DCT transmission installed or replaced in a 2005-2011 Mercedes B-Class?
Replacing the 7G-DCT transmission involves several steps. First, disconnect the battery and remove the transmission fluid. Detach the driveshaft, transmission mounts, and electrical connectors. Lower the transmission using a jack and remove it from the vehicle. Install the new transmission by reversing the process, ensuring all connections are secure. Refill with approved transmission fluid and perform a system reset using diagnostic tools. Professional installation is recommended to avoid damage.
Q4 What are common troubleshooting steps for the 7G-DCT transmission?
What are common troubleshooting steps for the 7G-DCT transmission?
Common issues with the 7G-DCT transmission include rough shifting, delayed engagement, and warning lights. Begin by checking the transmission fluid level and condition. Inspect for leaks or damaged components. Use a diagnostic tool to read error codes and update the transmission software if necessary. If problems persist, inspect the clutch assembly and mechatronic unit. Professional diagnosis may be required for complex issues.
Q5 How can I optimize the performance of the 7G-DCT transmission?
How can I optimize the performance of the 7G-DCT transmission?
To optimize the 7G-DCT transmission, ensure regular maintenance and use only approved transmission fluids. Avoid aggressive driving and excessive load to reduce wear. Keep the transmission software updated to benefit from performance improvements. Use the vehicle's driving modes appropriately, such as Sport or Eco, to match driving conditions. Regularly inspect and replace worn components to maintain smooth operation and efficiency.
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 B-Class 7G-DCT Service Manual
Coming SoonDetailed service manual for the 7G-DCT transmission, covering maintenance, repair, and troubleshooting procedures.
7G-DCT Transmission Technical Bulletin
Coming SoonTechnical bulletin addressing common issues, software updates, and compatibility for the 7G-DCT transmission.
7G-DCT Transmission Parts Catalog
Coming SoonComprehensive catalog of replacement parts and accessories for the 7G-DCT transmission.
Legal Disclaimer
Important information about using this content
Always refer to your vehicle's service manual and take appropriate safety precautions when performing any maintenance or repairs.
General Information
Warranty & Liability
The content on this website is provided "as is" without any representations or warranties, express or implied. We make no representations or warranties regarding the accuracy, completeness, or availability of the information.
We shall not be liable for any direct, indirect, special, or consequential damages arising from the use of information on this website.
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.
Intellectual Property
About the Author
Expert automotive knowledge and experience
'/%3E%3Cpath d='M60 30a20 20 0 1 1 0 40 20 20 0 0 1 0-40zm0 45c16.5 0 30 7.5 30 16.8V100H30v-8.2c0-9.3 13.5-16.8 30-16.8z' fill='%23404040'/%3E%3C/svg%3E)
Diagnostic
Specialized in advanced diagnostic techniques using modern scan tools and oscilloscopes.
Repair
Expert in both traditional mechanical repairs and modern vehicle systems.
Additional Expertise
Documentation
Created over 500 detailed repair guides and technical documents.
Training
Conducted technical training sessions and contributed to repair databases.
Certifications & Research
Certifications
- ASE Master Technician Certification
- Advanced Diagnostic Specialist
- Hybrid/Electric Vehicle Systems
- Performance Tuning Expert
Research & Community
Actively researches emerging technologies and contributes to automotive forums.