I have recently taken delivery of the new A6 Allroad. and have noticed a significant lag when I accelerate from a standing start, (around 2 secs). I have complained to the dealer about this and they tell me their is going to be a fix to this problem around week 14 2020. In the meantime I believe the effect of this fault to be dangerous particularly when turning right off a main road, joining a roundabout and joining a traffic queue. I have raised the issue with Audi UK and then have escalated it.