Peter Roycroft

My Q5 S Line has developed what I can only describe as a juddering from the front wheels when moving off. It is more pronounced when moving off from a junction and there is steering input. Has anyone else experienced this? It didn't used to do this and it is pronounced enough for passengers to notice. As a matter of interest my local Audi dealer thinks there is nothing wrong, but I do not believe that they actually drove it. They said it was "an expected feature of the Quatro system".