DSG & Automatic Transmissions — Clutches, Mechatronics & Control Units
Mercedes 7G-Tronic (722.9 VGS) Control Unit Repair
Is your 7G-Tronic stuck in limp mode or shifting incorrectly? We check the VGS control electronics and assess repair options.
Thematic AI illustration
How the service works
Describe the issue
Tell us the model, year, symptoms and any fault codes.
We inspect the problem
We assess the cause and whether work is supported for your vehicle or module.
Agree on the work
We explain the proposed service and how the price is determined before starting.
Check the result
We perform available tests appropriate to the module and completed work.
Mercedes 7G-Tronic (722.9) can enter limp mode, remain in one gear or display a transmission warning. One possible cause is the VGS electronic control unit with integrated speed sensors. Similar symptoms can have other causes.
When to contact us
- The gearbox stays in limp mode or does not shift.
- A transmission warning appears on the dashboard.
- Diagnostic codes concern speed sensors or VGS communication.
What we check and repair
We identify the part number, VGS generation and fault codes. We check power supply, communication, electronic circuits and available sensor signals. If an electronics fault is confirmed, we discuss board repair or preparing a compatible replacement.
What to provide
For a removed unit, please send its label photo, part number, vehicle model and diagnostic report. Programming or adaptation on the vehicle may be required after installation.
When the vehicle comes to our workshop
For VGS repairs on the vehicle, we carry out the work needed to remove and reinstall the unit inside the automatic transmission. After disassembly and repair, we replace the transmission fluid in the relevant part of the gearbox according to the 7G-Tronic design. If the customer brings or sends a unit that has already been removed, we repair the unit only; no vehicle fluid change is included.
Important
This service covers VGS control electronics, not the valve body, torque converter or mechanical gearbox.
Features
- VGS electronic module inspection
- Speed-sensor fault analysis
- Repair or compatible replacement assessment
- Removed modules accepted by arrangement
Other AUTOLAB services
Ready to start the job?
Describe the problem in the contact form — we reply within a day.