Mercedes-Benz Mercedes CLA 2013-2019 7G-DCT Transmission Specifications
This document provides a detailed overview of the 7G-DCT (7-Speed Dual Clutch Transmission) specifications for the 2013-2019 Mercedes-Benz CLA. It includes technical details such as gear ratios, torque capacity, shift patterns, and fluid requirements. The purpose of this document is to assist automotive technicians, enthusiasts, and owners in understanding the transmission's design, performance, and maintenance needs. It also serves as a valuable resource for diagnosing issues, performing upgrades, and ensuring compatibility with replacement parts. By offering precise and reliable information, this guide enhances the reader's ability to maintain and optimize the transmission's performance, ensuring longevity and reliability for the Mercedes-Benz CLA.
Overview Specifications
This document provides detailed specifications and technical information about the 7G-DCT transmission system used in Mercedes-Benz CLA models from 2013 to 2019. It is designed for automotive enthusiasts, technicians, and engineers seeking in-depth knowledge about the transmission's design, performance, and maintenance. Use this guide to understand the system's features, operational parameters, and key specifications.
How to Use
Use the search bar to find specific terms or phrases within the document. Enter keywords like 'gearbox ratios' or 'torque capacity' to quickly locate relevant information.
Navigate through the document using the table of contents or by scrolling through sections. Each major section is labeled clearly, and subsections provide detailed breakdowns of specific topics.
Key Specifications
Gear Count
7-speed
Torque Capacity
400 Nm
Shift Time
100 ms
Fluid Change Interval
60,000 miles
Weight
85 kg
Available Specifications
Transmission Design
This section covers the structural and mechanical design of the 7G-DCT transmission, including its dual-clutch system, gear arrangement, and integration with the Mercedes-Benz CLA platform.
Transmission Design
This section covers the structural and mechanical design of the 7G-DCT transmission, including its dual-clutch system, gear arrangement, and integration with the Mercedes-Benz CLA platform.
Dual-Clutch System
- Utilizes two independent clutches for seamless gear shifts
- One clutch manages odd-numbered gears (1, 3, 5, 7)
- The other clutch handles even-numbered gears (2, 4, 6)
- Electronically controlled for precision and efficiency
- Designed for high torque capacity up to 400 Nm
- Compact design for improved packaging in the CLA chassis
Gear Arrangement
- 7-speed configuration for optimal performance and fuel efficiency
- Wide gear ratio spread for versatile driving conditions
- Helical-cut gears for reduced noise and vibration
- Integrated differential for front-wheel-drive applications
- Lightweight materials used for enhanced efficiency
Performance Characteristics
This section explores the performance metrics of the 7G-DCT transmission, including shift times, torque handling, and fuel efficiency.
Performance Characteristics
This section explores the performance metrics of the 7G-DCT transmission, including shift times, torque handling, and fuel efficiency.
Shift Times
- Shift times as low as 100 milliseconds
- Adaptive shift logic for sporty or comfort-oriented driving
- Pre-emptive gear selection based on driving conditions
- Smooth transitions between gears for enhanced comfort
Torque Handling
- Rated for up to 400 Nm of torque
- Robust clutch materials for durability under high loads
- Efficient heat dissipation to prevent overheating
- Compatible with both petrol and diesel engines
Maintenance and Service
This section provides guidance on maintaining and servicing the 7G-DCT transmission, including fluid requirements, common issues, and diagnostic tips.
Maintenance and Service
This section provides guidance on maintaining and servicing the 7G-DCT transmission, including fluid requirements, common issues, and diagnostic tips.
Fluid Requirements
- Requires Mercedes-Benz-approved transmission fluid
- Fluid change interval of approximately 60,000 miles
- Specialized equipment needed for fluid replacement
- Regular fluid checks to ensure optimal performance
Common Issues
- Occasional software updates required for shift optimization
- Potential for clutch wear in high-mileage vehicles
- Diagnostic tools needed for error code reading
- Professional servicing recommended for major repairs
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Transmission Specifications
Overview
- Type
- 7-speed dual-clutch automatic
- Configuration
- Transverse-mounted
- Platform
- MFA (Modular Front Architecture)
- Material
- Aluminum casing
- Location
- Front-wheel drive
Dimensions
- Length
- 22.8 inches (579 mm)
- Width
- 17.5 inches (445 mm)
- Height
- 12.6 inches (320 mm)
- Weight
- 161 lbs (73 kg)
- input Shaft Diameter
- 1.2 inches (30 mm)
- Output Shaft Diameter
- 1.4 inches (36 mm)
- Fluid Capacity
- 6.3 quarts (6 liters)
Materials
- Casing
- Aluminum alloy
- Gears
- Hardened steel
- Clutch Packs
- Carbon composite
- Seals
- Synthetic rubber
Features
- Performance
-
- Quick shift times
- Sport mode
- Manual shift mode
- Efficiency
-
- Start-stop function
- Eco mode
- Low friction design
- Control
-
- Adaptive shift logic
- Hill-start assist
- Integrated torque converter
- Driver Assistance
-
- Dynamic gear selection
- Creep mode
- Parking assist
- Durability
-
- Reinforced clutch packs
- High-temperature resistance
- Corrosion-resistant materials
Safety Features
- Emergency
-
- Fail-safe mode
- Automatic neutral shift on failure
- Protection
-
- Overheat protection
- Overload protection
- Monitoring
-
- Real-time diagnostic system
- Fluid level sensor
Comfort Features
- Smoothness
-
- Adaptive shift smoothing
- Low vibration design
- Noise Reduction
-
- Acoustic damping
- Precision gear meshing
- Convenience
-
- Automatic park engagement
- Customizable shift patterns
- Climate
-
- Thermal management system
- Fluid cooling
Accessories
- Upgrades
-
- Performance software
- Enhanced cooling kit
- Tools
-
- Diagnostic scanner
- Fluid exchange kit
- Maintenance
-
- Transmission fluid
- Filter kit
- Gasket set
Maintenance
- Service interval
- Every 40,000 miles or 4 years
- Service Items
-
- Fluid replacement
- Filter replacement
- Clutch inspection
- Seal inspection
- Diagnostic check
- Maintenance Notes
- Use only approved transmission fluid and follow manufacturer's guidelines for service
Warranty
- Basic
- Miles: 50,000Years: 4Coverage: Parts and labor
- Powertrain
- Miles: 100,000Years: 7Coverage: Major components
- Corrosion
- Miles: UnlimitedYears: 12Coverage: Perforation only
- Extended
- Miles: 120,000Years: 10Coverage: Optional purchase
- Warranty Terms
- Warranty coverage varies by region and may require regular maintenance
Production Details
- Manufacturer
- Mercedes-Benz AG
- Manufacturing Process
-
- Precision CNC machining
- Automated assembly
- Laser alignment
- Quality Control
- Testing: Dynamic load testinginspection: 100% component inspectionStandards: ISO 9001 certified
- Sustainability
-
- Recycled materials
- Energy-efficient production
- Low-emission processes
- Production Metrics
- Units Per Year: 500,000Yield Rate: 98.5%Defect Rate: 0.5%
Service Information for 7g dct transmission Service
Maintenance and service requirements specific to this component
- Transmission fluid replacement
- Filter replacement
- Seal inspection
- Clutch pack inspection
- Diagnostic system check
Use only manufacturer-approved transmission fluid
- Complete fluid flush
- Filter and gasket replacement
- Clutch pack performance test
- Shift mechanism inspection
- Control module update
Requires specialized diagnostic equipment
- Complete transmission overhaul
- Clutch pack replacement
- Seal and gasket replacement
- Fluid cooling system check
- Performance calibration
Recommended to perform at authorized service center
Common Questions
Find answers to common questions about torque specifications
Q1 Is the 7G-DCT transmission compatible with all 2013-2019 Mercedes CLA models?
Is the 7G-DCT transmission compatible with all 2013-2019 Mercedes CLA models?
The 7G-DCT (7-speed Dual Clutch Transmission) is compatible with most 2013-2019 Mercedes CLA models, including the CLA 250 and CLA 45 AMG. However, compatibility may vary based on engine type and regional specifications. Always verify your vehicle’s exact model and production year before purchasing or installing. Consult the Mercedes-Benz technical database or a certified dealer 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 40,000-60,000 miles, filter replacement, and inspections for leaks or wear. Mercedes-Benz recommends using only specified transmission fluids and parts. Adhering to the maintenance schedule outlined in the owner’s manual is crucial to prevent premature wear and ensure longevity.
Q3 How do I install or replace the 7G-DCT transmission in a Mercedes CLA?
How do I install or replace the 7G-DCT transmission in a Mercedes CLA?
Replacing the 7G-DCT transmission is a complex task requiring specialized tools and expertise. Steps include disconnecting the battery, removing the driveshaft, unbolting the transmission, and carefully aligning the new unit. Torque specifications and precise alignment are critical. It’s highly recommended to consult the official service manual or seek assistance from a certified Mercedes-Benz technician to ensure proper installation.
Q4 What are common troubleshooting steps for 7G-DCT transmission issues?
What are common troubleshooting steps for 7G-DCT transmission issues?
Common issues include rough shifting, delayed engagement, or transmission warning lights. Start by checking the transmission fluid level and condition. Inspect for error codes using a diagnostic tool. If no visible issues are found, reset the transmission control module (TCM) or update its software. Persistent problems may require professional diagnosis and potential component replacement.
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 performance, ensure regular maintenance, use recommended fluids, and avoid aggressive driving. Updating the transmission control module (TCM) software to the latest version can improve shift quality and responsiveness. Additionally, installing a performance transmission mount or upgrading to a higher-quality fluid may enhance durability and performance under demanding 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.
Mercedes-Benz CLA 7G-DCT Service Manual
Coming SoonDetailed service manual covering installation, maintenance, and troubleshooting for the 7G-DCT transmission in 2013-2019 Mercedes CLA models.
Technical Service Bulletin for 7G-DCT Software Update
Coming SoonTSB addressing software updates to resolve shifting issues and improve performance in 7G-DCT transmissions.
7G-DCT Transmission Parts Catalog
Coming SoonComprehensive catalog listing genuine parts and accessories for the 7G-DCT transmission in Mercedes CLA models.
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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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