Mercedes 7G-Tronic (722.9) Transmission Control Module Repair
Professional testing and repair for all VGS versions (VGS1–4) — lifetime warranty, fast turnaround, and free collection service.
Get Your 722.9 TCM Collected Free of Charge — Complete Our Test Form Today!
The Mercedes 7G-Tronic (722.9) gearbox relies on the VGS Transmission Control Module (TCM) to deliver smooth, precise gear changes.
Over time, internal sensor faults and electronic failures can cause loss of gear selection, limp mode, or complete loss of drive.
At VCUS, we specialise in the professional repair of all 7G-Tronic TCM versions — saving you hundreds over main dealer replacements. Our cost-effective repair service requires no programming when reinstalling, including the VGS4-NAG2 variant, making it a true plug-and-play solution.
722.9 Common Symptoms & Fault Codes
Common Symptoms:
No gear selection / stuck in park
Vehicle goes into limp mode
Jerky or delayed gear changes
Gearbox warning light
Reverse not engaging
No Communication with the TCM
Common Fault Codes:
P0720 – Output Speed Sensor Circuit Malfunction
P0722 – Output Speed Sensor No Signal
0717 / 0718 – Turbine speed sensor faults (signal missing or sensor defective)
2201 – Internal speed sensor defective
0721 / 0722 – Output speed sensor faults (implausible or no signal)
VGS1, VGS2, VGS3, and VGS4 – Mercedes 7G-Tronic TCM Comparison
Each version of the Mercedes 7G-Tronic (722.9) gearbox uses a different type of VGS Transmission Control Module (TCM).
Below is a quick comparison of the main versions, their production years, and repair pricing.
VGS1 / VGS2 / VGS3
Typical Years: 2004 – 2016
Description: Early to mid-generation 7G-Tronic TCMs, commonly fitted up to 2016. Internal speed sensor faults are the most common failure type.
VGS4
Typical Years: 2013 – onward
Description: Latest 7G-Tronic Plus module with updated internal sensor design. Improved reliability but still repairable when faults occur.
*VCUS is the only known company in the UK to offer a genuine VGS 4 repair service - No coding required, unlike replacement modules
VCUS - The Process
Testing and Rebuild Process
At VCUS, every Mercedes 7G-Tronic (722.9) Transmission Control Module (TCM) is rigorously bench-tested to confirm the fault before any repair work begins. Once the issue is replicated on our test bench, the module is carefully dismantled by our skilled technicians for detailed root cause analysis.
Any failed or degraded internal components are replaced with high-quality, uprated parts designed to improve long-term reliability. After reassembly, the TCM undergoes a full retest to ensure the fault has been permanently resolved. The repaired unit is then ready to be refitted to the vehicle — no programming or coding required, unlike many competitor solutions.
Every repair performed by VCUS comes with an unlimited mileage lifetime warranty, and this includes the 722.9 VGS 1, VGS 2, VGS 3, and VGS 4 Transmission Control Modules.
Simple Steps to Repair Your Mercedes 7G-Tronic (722.9) TCM
1. Remove Your TCM
Carefully remove the Transmission Control Module from your gearbox (also known as the VGS unit).
2. Fill Out Our Test Form
Complete our online test form to arrange a free-of-charge collection, or you can post it directly to us at the following address:
VCUS
Vehicle Control Unit Solutions
27 St Michaels Square
Bramcote, Nottingham
NG9 3HG
Please ensure the module is securely packed in a suitably sized box with protective packaging to prevent damage during transit.
3. Testing and Repair
Once received, your TCM undergoes comprehensive bench testing to confirm the fault. After repair, you’ll receive a detailed test report, lifetime warranty, and invoice via email. (Payment is only required once the repair is complete.)
4. Return Delivery
Your repaired TCM will be shipped back via Next Day Delivery, fully insured and tracked.
5. Reinstall the Repaired TCM
Simply reinstall the module back into your vehicle — no programming or coding required. Your original configuration is retained, so the unit is ready to operate immediately.
Choose VCUS for Reliable 7G-Tronic (722.9) TCM Repairs
VCUS provides a professional, hassle-free repair service designed to save you time and money while ensuring long-term reliability. Let us restore your Mercedes 7G-Tronic TCM to peak condition and get you back on the road without the high cost of dealer replacement.
Quick Links
Automotive Solutions
Vehicle Control Unit Solutions Limited.
Limited Company Number: 15019362
VAT Number: 496 4113 72