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Robert
Robert, UK Qualified Car Technician
Category: Car
Satisfied Customers: 4440
Experience:  Fully qualified / self employed garage technician in the UK
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,i have just had new pads and discs put on front and new

Resolved Question:

hi,i have just had new pads and discs put on front and new pads on rear , all with new sensors, but the brake wear light still on, the mechanic said it should go off in a few miles as it has to reset itself ! is this right ? my car is an s320 cdi 2007.
Submitted: 1 year ago.
Category: Car
Expert:  Robert replied 1 year ago.

Hi..there..

The brake lining wear warning should automatically reset itself once new sensors have been fitted front/back,it should actually reset pretty much straight away to be honest.done them before and alot of other models mercedes are of the same..as once the old ones make contact with the disc then they have to be replaced as they cause a short to ground/disc which brings the warning on,normal practice really is even if the sensor hasnt made contact with the disc and the pads are to be renewed the sensors can be done at the same time - have they ensured the sensors/plugged in properly / double check they are the correct sensors / make an inspection of the harness further up in which the sensor is connected to be sure the wiring isnt damaged,broken..if all seems ok they can try disconnecting the battery negative and reconnect and see if that works..but its worth at least ensuring all sensors as above are rechecked..if that warning doesnt reset....i do hope this helps

Robert, UK Qualified Car Technician
Category: Car
Satisfied Customers: 4440
Experience: Fully qualified / self employed garage technician in the UK
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