I have recently run into an issue where I cannot select drive or reverse after starting my ML350 BT, and yes, I do have my foot on the brake. I can shut the engine off and then restart and the system will allow me to put the car in drive or reverse. I am starting to wonder if I change something when I reset the service B notification. It took me several attempts before I got to the correct screen to reset the service. Puzzled?

 

Can you check if you need to change secondary battery within the trunk?