also worth remembering that the same engines were in golfs, octavias, boras, leons, ibizas and TT. not sure if the longitudial engines had the same TB if they do you could have A4 A6 and passats to the list
Cleaning the throttle body is a good service, the 1.8T. I used to make me clean up each service, because not so much a stop / start city driving. It 'was picking up and idle smooth.