Audi a6 is garbage. I use to own an allroad which is basically a sport wagon version of the a6 with a different suspension and even though it was fun to drive and a good looking car in and out it always had problems with the electronics and the air suspension. Get a BMW 5 or Mercedes e class instead. Same class of car, far less headache. I recommend the Mercedes e class especially I've owned and will likely buy it again for my next purchase.