Only had a3 sportback 2 weeks. Been back once to dealers garage for hose leak.
then had checked by my local garage who said engine noise sounds very deep, they suggested air filter may not have been put on when service? Have seen occasional grey/white smoke from exhaust when revving but not excessive - any ideas, they suggested I took it to audi to check which will cost and have 6 months warranty with dealer.

 

2006 model year vehicle - What mileage? Wouldn't this still be under factory warranty or CPO if bought from an Audi dealer? - Should never see grey/white smoke coming from the exhaust.

 

57,000 miles. Not an audi dealer but did get 6 months warranty, looks like I have made an expensive mistake