Hi I've just bought an Audi A3 2Lt tdi Quattro, firstly I bought this with the n/s/r wheel binding and ABS light on, I carried out a diagnostic check and as I thought I found the code 0122 wheel speed sensor rear left and 030a steering wheel angle sensor...after fixing the calliper and renewing the abs sensor I erased all the codes and it was driving great then the esp light has come on after a few days codes now giving 052C can message 4wheel drive no signal and 051D power steering control unit no signal. Can anyone help with this. Cheers