EWM
Selector lever not responding? We test your EWM.
The electronic selector lever module (EWM) detects which gear you select – P, R, N or D – and passes it on to the gearbox as a signal. We repair your original EWM.
Typical symptoms
- Gear can’t be selected, or only with a delay
- Gear indicator is missing or jumps
- Selector lever won’t move out of P
- Selector lever lighting fails
- Fault codes for the selector lever module
What causes it?
The EWM is used many times on every drive. Wear on contacts and sensors, ageing electronics or moisture mean the selected gear is no longer reliably detected.
The DSM (formerly ISM) on the gearbox can cause similar symptoms. Diagnostics show whether the EWM, the DSM or the transmission control is the cause.
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
What is the difference between EWM and DSM?
The EWM detects what you select at the lever. The DSM on the gearbox then engages that gear. Both work together – we repair both.
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.