Do it yourself
Frequently asked questions about cars and motorcycles
Car tutorial (Do it yourself) Motorcycle tutorial (Do it yourself) Frequently Asked Questions

Replacing the Transmission Control Module on the Mercedes C-Class W203

Model: Mercedes Classe C W203 - Years 2000-2007
Part: Control unit

In today's tutorial video, you will learn how to remove and replace the transmission control module on the Mercedes C-Class W203, as well as on other models from the manufacturer (such as the A-Class W163). First, disconnect the battery terminals. Next, locate the module under the floor on the passenger side, as shown in the video. Now, unscrew the side mounting screws to remove the panel and access the module. Disconnect the electrical connectors to remove and replace it!

Updated on 22 April 2026 by ScegliAuto

Video tutorial

Related tutorials

Resetting the Automatic Transmission of the Mercedes C-Class W203
Resetting the Automatic Transmission of the Mercedes C-Class W203
Mercedes Classe C (2000-2007 / W203) .. The automatic transmission of the Mercedes C-Class W203 is adaptive, meaning it adjusts to the driver's style by shifting gears based on the accelerator.. …
How to temporarily solve the problem of a faulty control unit on a Mercedes C-Class W203
How to temporarily solve the problem of a faulty control unit on a Mercedes C-Class W203
Mercedes Classe C (2000-2007 / W203) .. We are on board our Mercedes C-Class W203 version: we can't get it started in any way, the temperature doesn't rise and we can't move.. …
How to reset the engine control unit of the Mercedes C-Class
How to reset the engine control unit of the Mercedes C-Class
Mercedes Classe C (2000-2007 / W203) Below we will see the steps that will allow us to reset the ECU of the Mercedes C-Class. Before resetting via computer, let's try disconnecting the p…

Other guides you may be interested in

How to Open a Stuck Boot on the Peugeot 407?

On the Peugeot 407, the boot may become stuck, possibly due to a problem with the control button or the lock actuator. In such cases, you can perform an emergency opening by following the simple procedure shown in this tutorial. First, open the rear doors, then lower the seat back by operating the release lever. Next, go inside the boot, locate the lock, and manually operate it using a flathead screwdriver. The boot will then be free to open.

Watch the video!


by ScegliAuto

More videos