One problem related to engine burning oil has been reported for the 1999 Audi A6. The most recently reported issues are listed below.
Engine oil leaks. Wife (main driver of vehicle) reported strong smell of burning oil. Dealer mentioned that this is a common problem and that manufacturer has covered repair for other owners. Manufacturer declined assistance for our model year (1999 with 37,000 miles) even though they would approve a 2000 model year with up to 62,000 miles.