Yeah, it's a bit odd that there's a spot for an oil temp unit, but Audi (in their infinite wisdom) opted to leave it empty /ubbthreads/images/graemlins/crazy.gif The part that the oil filter screws into has a spot for the temp sensor, you just have to remove a plug to fit it /ubbthreads/images/graemlins/smirk.gif
Haven't done it myself, but doesn't look TOO hard /ubbthreads/images/graemlins/angel.gif
/ubbthreads/images/graemlins/grin.gif /ubbthreads/images/graemlins/beerchug.gif