This past Saturday my wife's GLB went into Limp mode as she was accelerating into the main road which could have been very dangerous. Luckly I was right behind her. Drove the car back to the house and hooked the scanner to it but no alarms were active. Thou, a p019185 was stored in the ECM. I disconnected the battery for about 5- 10 minutes, and the limp mode cleared. I figured it was just a glitch, but it is definitely very concerning. Not sure if any of you GLB drives have experienced a similar issue with your vehicle.

 

I haven't had that issue but I am getting a notification on the dash about a 12v battery. Not sure that's the aux battery or main battery.