My vw went to have engine rebuild as it was covered under warranty which i paid extra for as the timing belt hAd slipped a tooth after 3months got car back and a dent was on top of the wing got that sorted took car back as it was noisy and had new hydraulic lifters got car back two months down the line got a dpf notice on dashboard took it to independent mechanic and the dpf sensor was not in place just hanging there thATS what caused blockage cost £150 had to take car back as engine management would not go off after investigation there was another sensors not fitted correctly and the pipe to turbo incorrectly put back cost £340 to fix also wire broke on oil sensor went to arnold Clarke to tell them about all faults but manager would not have it agreed to pay for dpf cleaned bill took invoice to him he said not good enough the invoice so my mechanic rang him was not available said he would ring my mechanic he also insinuated that i was lying about dpf sensor as i was there when dpf was cleaned and saw with my own eyes the sensor had not been put back in after engine rebuild never go to arnold clark wigan again or any arnold clark my advice is to keep away from there service department problems after problems once they had there hands on it and heard lots of stories since