It would be interesting to try as the gti 6spd profile shouldn't be in the 1.8 ecu, but it is. Unless the gti and Sportwagen share gear ratios because to get cruise control and gear indicator to work, had to select awd 6spd profile (credit to @Six Speed Tsi )The Transmission module has pre-loaded “profiles” if you will for the various transmissions offered on that particular box code. If the transmission you’re installing isn’t in the long coding then you won’t be able to set the car for the new ratios. It judges what gear you’re in by the RPM the engine is at for the speed you’re going based on that profile. If it can’t figure out what gear you’re in the ECU disables cruise control.
This info is based on a guy on Vortex’s research, he’s trying to put a Golf R 6MT in his S3.
I am trying to put a Golf R 6MT in my Alltrack, too.