I have just purchased a 2003 A4 SE model, 150k, i'm very happy with it as it runs like a dream and I only paid £600 with a long MOT. However during this cold spell it takes a few turns to start followed by smoke when it eventually starts. Also when it's a cold start there is no boost only when the car warms up do I feel the boost. The EM light is on and I have ran diagnostics and it's come back with intermittent ground problem on MAF sensor. Just wondering if anyone has had a similar issue. I've not replaced the MAF sensor yet purely because that error might well be a red herring. Thanks in advance for any help.