Description
Mercedes-Benz 9G-Tronic (725.0) Transmission Control Module Repair Service
Fast, Accurate, Trade-Focused Repairs
We specialise in diagnosing and repairing the 9G-Tronic Transmission Control Module (TCM), also known as the 725.0 TCM, fitted to a wide range of late-model Mercedes-Benz vehicles. These units are prone to a number of sensor and internal electronics failures which can leave a vehicle in limp mode, unable to shift correctly, or completely inoperative.
Our in-house test bench allows us to fully simulate vehicle conditions — checking every sensor, solenoid driver, and communication line without the need to reinstall the unit in a transmission. This ensures your repair is fast, accurate, and proven before it leaves our workshop.
Common Problems We Repair
No gear engagement – stuck in Park or Limp mode.
Harsh or erratic shifting – rough gear changes, hesitation, or slipping.
Loss of communication – scanner unable to connect to the TCM.
Park position sensor failure – incorrect gear position display or “P” not detected.
17090, P0706 – Transmission Range Sensor (F125) ( See other Listing )
17101, P0717 – Transmission Input Speed Sensor (G182): No Signal ( See other Listing )
17105, P0721 – Transmission Output Speed Sensor (G195): Implausible Signal ( See other Listing )
17106, P0722 – Transmission Output Speed Sensor G195 no signal ( See other Listing )
17137, P0753 – Shift Solenoid 1 (N88): Circuit Failure
18201, P1793 – Transmission Output Speed Sensor 2 (G196) ( See other Listing )
18226, P1818 – Pressure Control Valve 2 N216
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