Hey On Truck Actros error message MR 0412..Workshop Master (not truck) connects OBD and says camshaftsenosr does not receive a signal..No problem can he make 1 customer drive truck to the workshop and should be backwards at hall.Master instructs him.He slowly returns…master says everything OK..All of a sudden KRACH ..Top for advertising sign Must customer pay this now?? 2. Workshop replaces sensor from .Miss power lines and so on..Nu does not jump any more.. cedes now reprogram control unit.For this purpose truck can not rent today and the examination of colleagues (driving school) is probably also out Who comes up for costs?Further repairs and loss of earnings Before truck ran normally except for the error message