Have had nasty rattling sound since the heavy snow which has been diagnosed as CAT - have been quoted Ł350 (Kwik Fit) to Ł600 (4 Rings - official audi part). Any other places recommended
Is there much difference between official /non audi parts? I been told that with non audi part I am likely to get engine management light coming up - is this true? Also should I get rest of exhaust changed at same time?