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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

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