Hi all - still here - thanks for all the info, thread has exploded! I got onto Vanmatic (ZF centre) yesterday and booked it in for week after next as I'm away next week. Though I then spoke in more detail to my mechanic today and he said they followed the full procedure to a T - level car, monitoring temp, checking level etc. Used the genuine oil and correct filter. His explanation as to why it is worse now than before is that the filter was so clogged that it was holding oil pressure in the box. The fault code is apparently 'speed sensor' or something. I may still go to Vanmatic just to see what they have to say (and because my mother in law is visiting at the time so I'll not mind getting out for a few hours....) though I'm a bit reluctant to throw more money at it if it's not going to help - my mechanic gave me a bill for £300 as it is... I fear this may be the end of the road for me and the A8.... Anyone fancy a lovely 4.2 D2 in great shape apart from the gearbox?