BODY / BCM
Lights or comfort functions acting up? Often it’s the SAM module.
Several failures at once with no obvious connection – that often points to a comfort electronics module.
Typical symptoms
- Lights, indicators or wipers fail or switch on by themselves
- Central locking, windows or interior lights misbehave
- Battery goes flat overnight (high quiescent current)
- Several faults at once with no obvious connection
- Failures after water got into the vehicle
What causes it?
SAM modules (signal acquisition and actuation modules) and other comfort control units switch many consumers in Mercedes-Benz vehicles. Where they sit in the footwell, engine bay or boot, water ingress alone is often enough to cause corrosion on the board.
Burnt tracks, relays or fuses are also typical. We find out which module is affected through diagnostics.
Focus on Mercedes-Benz. AEZ is an independent master workshop; brand names are used for description only. We tell you whether a repair is possible after testing.
How the repair works.
- 1
Get in touch
Vehicle, VIN and what happened – via WhatsApp, phone or form.
- 2
Drop off or send in
Hand it in at Bottrop or, after a quick chat, send it by DHL. How shipping works
- 3
Test, price, repair
You get the findings and price before we repair. Then the unit goes back to you.
Frequently asked questions
How do I know which module is faulty?
You don’t need to know. Describe what fails and when – we find out through diagnostics which component is affected.
How much does the repair cost?
That depends on the unit and the fault. After testing we tell you the price – we only repair with your approval.
Can I send the control unit in?
Yes. After a quick chat, by DHL to AEZ, Werkstraße 4, 46240 Bottrop, Germany. Packing tips and the shipping note to fill in are on the “Sending in a control unit” page.
Do you only work on Mercedes-Benz?
Our focus is Mercedes-Benz. For other makes, just ask with the vehicle and part number – we’ll tell you honestly whether we can help.