Quoted 0 Post (s) Remove fuel tank Audi A4 Avant 2.0l estate 2007 B7 – 23-02-2014, 11:22 AM. Hi there, driving down the A3 Friday (cruising, 80 mph) and ran over a short length of scaffold pole, bang, thought. i must have got a puncture at least, looked in the rear view mirror, back window misted up, white smoke. pouring out the back. 8o6z.