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

Replacement of the Car Airbag Control Unit

Model: Mercedes Classe M W163 - Years 1997-2005
Part: Airbag

The following guide shows how to address the airbag warning light issue. You may need to replace the control unit and fuses. In such cases, it may be helpful to take your car to a service centre where they will connect your vehicle to sophisticated software that can identify the reasons for the malfunction. This problem can occur frequently, likely due to the constant movement back and forth when someone is seated in the rear, causing one of the sensors located in the passenger seat to become loose. The wire may not be connected properly or may be oxidised.

Updated on 18 February 2026 by ScegliAuto

Video tutorial

Related tutorials

Driver Airbag Kit Replacement
Driver Airbag Kit Replacement
Mercedes Classe M (1997-2005 / W163) If the driver airbag (check the condition of the seatbelt pretensioner as well) has deployed after a collision, specifically the one located at the c…
How to deactivate the airbag light on the Mercedes M-Class
How to deactivate the airbag light on the Mercedes M-Class
Mercedes Classe M (2011-2018 / W166) This brief guide will explain the procedure for resetting the malfunction indicator light of the airbag in the Mercedes M-Class; before performing th…
Instructions to Reset Airbag Warning Light
Instructions to Reset Airbag Warning Light
Mercedes Classe M (1997-2005 / W163) If the airbag system warning light (SRS) remains illuminated on the instrument cluster display after the self-check, you need to use a diagnostic too…

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