I forgot to mention.. this car, like most mercs, has a chain not a beltWell I'm asking for a friend had a battery battery problem, went to garage and now had all sorts of issues. Been told the car is scrap (cam belt gone) and offered £300 for it!
My gut feeling is they've damaged a wire somewhere and/or are just thick or they've done something stupid.
Engine still runs so cam belt is fine. I'm trying to think of options before he goes any further