Tl*the contact owns 2008 audi a3. while driving approximately 30 mph on normal conditions the vehicle stalled without warning. the engine restarted and resumed operation. in addition, on a separate occasion the vehicle exhibited an unintended increase in acceleration. the failures occurred intermittently. the vehicle was taken to an authorized dealer for diagnostic testing on three occasions for the identical failures. the technician was unable to duplicate the failures. the vehicle has not been repaired for the malfunctions. the failure mileage was 7,000.