Fixed
after hours off testing
finally traced fault to rcm module
had previously taken out and totally resolder board
fault with car
wont crank
wont come out of park
no brake lights

no VOLTS coming out of plug c pin 5
on rcm even though relay pulls in

I bypassed rcm with external relay
starts every time .brake light work and can get out of gear
so check VOLTAGE at plug c pin 5 red green
this feeds gear shift
I had no symbol on dash to tell me what gear selected

hope this helps someone in the future

and no I don't own a crossfire
just got talked into looking at it
as Mercedes didn't want to look at it