from what Ive read there appear to be 2 levels of ESP off :
1. short press of button
2. >10sec press of button
is this correct ? and if so Kenny are you doing initiating mode 2?
I guess speaking to a company who race mk5's would ultimately be of the most help e.g. VWR
....Their race prepared cars have everything stripped right out of them - It's down to rebuilding from the shell. But I don't know about the ECU's.