Knocking between 25-30mph

[ianbrady04]

Hi, I'm messaging on behalf of my neighbour, he has a 67 plate Audi Q5 which he purchased 2 months ago and he has said there is some kind of noise and feeling in the accelerator when he first turns the engine on and gets to 25 - 30mph once it happens it is fine until the engine is stopped and turned back on again. He has taken it to Audi and there saying its fine and its a known issue on the 17/67 plate, does anyone know of this is true or have the same issue, thanks Ian 

[Steve Q]

If it's been to Audi then I would be taking it to another Audi garage for a second opinion. Definitely want this issue sorted whilst it's under warranty.