A200 w177 car has a warning on screen something along the lines of warning parking apply parking break car may role... but you can not select p r n d pressing the stalk does nothing. I have had it plugged in and it says no communication to the tcm.
does anyone know where this is located are there any common problems for these auto boxs that result in no comms with tcm
Also
secondary battery voltage warning is on this wouldn't stop it from selecting gears?

All help appreciated cheers