Recently my Audi A4 2008 s-line started stalling while pulling out of a parking spot in reverse. Engine would start fine and as soon a I would start reversing it would stall . I would push the gas pedal down but nothing would happen no power. If I wait a while and try 4 or 5 times it starts back up !! It's done this 4 times in the past month. Anyone had this issues and what's the solution ??