what exactly is the light that comes on ,,on the dash board is it a spanner ??are there any other probs apart from the light on most new cars are checked for faults vis insertin a computer into the fuse bos which determins the fault in most cases as with ECU /'s they send signals to all electrical sensors on the vehicle advise if there are any other faults as i have had 3 or 4 206's and the spanner is usually the main dash light to get rid off which is no problem if thats it