2012 S5 4.2 stalling when stopping Plz Help

[BkAlbo]

Hey guys so my 2012 S5 4.2 is stalling and shutting off while I stop at a res light or stop sign. This happens approx once a week. All screens on the dash start going on and off and then seconds later the car turns off with a gearbox malfunction message that also blinks on and off. My transmission is good and I haven’t had any problems at all while driving. Has anyone experienced anything like this? I appreciate any help thanks Tim

[ChachBoi]

Take your car up to AutoZone and have it load tested. This sounds like a bad battery or failing alternator to me. Check your grounds as well. My bet is on the battery though