Audi is investigating claims by a customer that staff at a franchised dealership took 'joyrides' in his RS4.
Mark Reece alleges his RS4 estate was driven 27 times while it was left for servicing at his local Audi dealership in Bexley.
The car stayed with the dealership for 11 days while Reece was on a business trip.
He said logs from a Tracker Response monitoring system fitted to the car subsequently showed that the car was moved occasionally during the first few two days, but on the third day it was driven around the local area at up to 60mph.
It recorded further drives, and altogether logged 16 miles of use.
Audi UK said its initial inspection of the Tracker's data has been inconclusive, but it is looking into the issue and will not comment further until the data can be fully interrogated and checked.