Okay so I have got a 140bhp a3 tdi it's done 50,000 I had it remapped last Christmas the last few days I've noticed a greyish blue smoke Comeing from the exhaust it doesn't do it if you sit still and rev it but does when you accelerate gently it lets a cloud out randomly it doesn't mater if it's hot or cold you can be driveing for 5 mins until it randomly does it or just taking off it just doesn't make sense can anyone help before I take it to Audi tomorrow thanks dan