I just picked up a 2008 1.4T sport from Audi, approved used. Everything is perfect about the car, but, I was on the motorway & all of a sudden I lost all power in 6th gear, dropped it to 5th & nothing. Pulled over on the hard shoulder, switched it off & on again. All back to normal now and hasn't happened since. It's only on 23,000 miles but I've had it for less than a day. Obviously they'll want to take it back into the garage but the fault might not even be logged. Should I just reject this vehicle as there might be more problems ahead? Advice needed please