Put me c class 320 in for remap. 2 1/2 wks ago for a 2 hour job, he rang later that day , to say the chip won't take the remap, and he'd try putting the old map on , rang me an hour later, couldn't put the original map on, and he'd have to send the ecu to the company who wrote the remap , rang me 3 days later to say the ecu had been corrupted , and it now needs a new ecu, a week later he rings and says ecu is fitted, but now car must go to mercedes for keys to be matched to ecu , so 2 1/2 weeks later here I am , still without car, thought remap was good idea, thinking back , maybe no such a good idea !!!!