I have a 2012 s8- t6 platinum recently the car has been shutting down. Emergency brake light comes on brake failure light comes on and the transmition seem to go to neutral. Turn it off and let it set for 15-20 minute starts right up. This has happen 5-6 times recently. The dealership has had it twice to look at he codes and reset the check engine light. The dealership is at a loss as to what is causing this. The codes do not indicate anything. Last time in it had 3 pages of codes.

Any one had this type of issue?