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Hi, my name is***** the warning light actually display the word PARK or PARKING BRAKE?
Okay, the fault will be with the electronic parking brake controller. Let me check to see if there is anything he may have done in the rear that could cause this. I'll reply back shortly.
Looking at the rear calipers and parking brake I think the only thing that may have happened is he disconnected or damaged one of the parking brake cables. He should inspect the cables and make sure that they are attached and correctly fitted into their brackets. If the cables have come loose the brake will not function properly and the warning light will come on. If the cables are fitted properly you will need to get the car connected to the Mercedes tester to check for fault codes and reset the parking brake system.
The cables are not too bad but the controller is pricey. If the cables are not the problem they may be able to perform a reset on the parking brake control unit.
The cables are $60 and $85 but the controller is $950. Replacing the cable is probably not something that you should attempt.
Sorry I hit send prematurely. Replacing the cable is probably not something that you should attempt. The Mercedes Star Diagnosis tester is required for moving the brake controller into the assembly position.
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