Mercedes Ignition Switch EIS EZS – Repair Service – W204 W207 W212 W218 W264 W166


MotorTronics provides a prompt test and re-manufacturing service for your Electronic Ignition Switch, the EIS will be completely tested and re-manufactured making it plug and play.

Having your EIS re-manufactured rather than purchasing an expensive new unit means there is no need for further dealer security programming or coding to be done once the unit is returned to you, only after this, we pass it and it’s ready for dispatch.

All that is left for you to do is

1. Click Buy it Now / Add to Cart
2. Fill in the Order Form / Packaging Slip provided after the payment page.
3. Send your: EIS -(Electronic ignition switch) and Key with the Order Form
– For models W204 W207 W212 we would need the steering lock as well.
4. Await Repair while we have your part(s)
5. Once received simply Plug it in and turn the key.
6. In some cases you will require diagnostics to adapt / clear codes.


This service is suitable if you have any of the symptoms listed below.

The key is not recognised in the electronic ignition switch, the vehicle cannot be started and/or the automatic transmission
may go into Park at speeds below 6 km/h.

– No Ignition
– Unable to start the car
– Steering lock doesn’t unlock
– Key turning in the ignition but no response – but car wouldn’t start (engine not turning over)
– Intermittent Key faults

We are able to simulate all of these fault conditions on our specially made test rig to ensure the issues are tested before and after repair.