I just finished doing a service on my wifes 02 A4 1.8t quattro last night, very very little buildup on the magnets but the fluid was gross and BLACK, like every other Audi trans pan I've dropped. The car has 193k kms (116k mi) searching here I see 100k mile intervals 60 k mile intervals which one should I go by? She probably puts 5-7k kms a year on the car. Should I bother changing the filter in any time under 160k kms and just do a dump and fill every 30k until? I used Ravenol 4/5hp fluid and a Meisteratz filter.