Automatic Shifter stuck in Park




Any help or guidance would be much appreciated.
Many thanks.
B.
To get car out of PARK the brake needs to be applied. If car is Keyless GO and it starts then brake signal works as the car would not start without it but if you use the key in the ignition the brake signal is not needed for starting the car but if the signal is missing it won’t shift from PARK.
Just a thought....
Guessing that AUX battery mentioned by poster above was low on juice.
Does anyone know where the AUX battery is located? I remember its position under the hood on my now sold W211 but never put eyes on it with the W212.












