Or you can try doing some research on REVO http://www.bigboyztoys.co.uk/shop/in...php?pages_id=4 they say they tune Mercedes ECU's.

I think they sell a cool little gadget for the audis which plugs into your serial port, for switching between stock map ecu and tuned ecu. Kinda makes me want to buy an Audi S4 just for the number of upgrade mods out there for those cars.

manufactures site: http://www.revotechnik.com/