Hi Ok went to get a key reprogrammed ,the guy had all the equipment ,he ended up taking the barrel out,took it apart and examined the chip under a magnifying glass and said I have a new barrel in my 57 reg W221 S320,and so he could not do it,ok there was no charge,but I am left with a problem,I understand that you take your log book your passport and a letter from god to the local Mercedes dealer and they get a key from Germany for I understand £250,but how will they know from my vin that it has had a new barrel fitted sometime in the past,I would hate to pay the money and get a key that does not work.