Hi, S4 Avant. 2000 model, ABT mods. 67,000 miles. Has anybody else experienced the problem I seem to be getting with my ESP for the last 6-7,000 miles. Basically, under hard (not extreme) acceleration in 2nd or 3rd gear, good road conditions, very good tyres, I am intermittently getting power loss with corresponding ESP light on dash flickering. i.e. just as if I really was losing traction and the ESP kicking in. However, this is on dry roads, straight line acceleration and is intermittent. e.g. I mostly don't see this in wet conditions! Audi gave it full diagnostics check. Pronounced no faults found and they could not even reproduce the problem. I am at a loss as what to do next .... you never know if it is going to happen when you attempt to overtake ... can have a pretty heartstopping moment if you lose power at that point! Regards .. John.