The Mercedes 7G-Tronic automatic transmission with gearbox code 722.9 is susceptible to a common fault that causes drivability issues. When the transmission control module/conductor plate experiences an internal breakdown, it leads to prolonged gear holding and forceful gear changes, resulting in rough and jerky gear shifts.
The fault starts intermittently but becomes permanent if left unresolved, making it crucial to address the issue promptly. The TCM conductor plate’s failure prevents proper monitoring of the input shaft’s rotational speed, leading to ineffective torque clutch lock-up, hindering smooth gear changes, and, in severe cases, preventing gear selection altogether.
But worry not, we have the perfect solution for you!
Our expert team offers a complete rebuild service for your Mercedes 7G-Tronic control unit within 2-3 working days.
Common Failure Symptoms:
- Intermittent gear changes
- Transmission goes into limp mode
- Stuck in gear
- Inability to select gears
Common Fault Codes:
- 0717 – The Signal From Component Y3/8N1 (Turbine Speed Sensor, VGS) Is Not Available.
- 0718 – The Component Y3/8N1 (Turbine Speed Sensor, VGS) Is Defective.
- 2201 – The Component Y3/8N2 (Internal Speed Sensor) Is Defective.
- 0722 – Output Speed Sensor Y3/8N3 Output Speed Sensor VGS Not Available
- 0721 – The Transmission Output Speed Signal Is Implausible When Compared To The Wheel RPM Signal
Affected Vehicles:
Various Mercedes models fitted with the 7G-Tronic automatic transmission, including C-Class, CL-Class, CLK-Class, CLS-Class, E-Class, GL-Class, GLK-Class, ML-Class, R-Class, S-Class, SL-Class, SLK-Class.
Removal Instructions:
- Drain gearbox oil
- Remove oil pan & internal oil filter
- Unscrew the 10 screws holding the valve body to the gearbox
- Unplug the control module multi-plug connector and then remove the valve body from the gearbox (use caution to avoid damaging the connector)
- Remove the 10 screws holding the control module to the valve body
- Remove the 8 solenoids that connect through the control module to the valve body (note their positions for correct re-installation)
Test and Rebuild: Our complete rebuild service ensures thorough testing and identification of internal faults. We use higher-rated components than standard during the rebuild process to guarantee long-lasting performance, backed by our lifetime warranty.
Programming: The control modules are programmed to the vehicle’s immobilizer and chassis number. Fitting a second-hand unit is not an option due to programming restrictions. However, with our rebuild service, you retain all the original programming for a simple plug-and-play installation.
Choose ImmoTools Cyprus for your Mercedes 7G-Tronic gearbox ECU needs, and experience a smoother and reliable driving experience. For further information or inquiries, please don’t hesitate to contact us.
