Sorry, I'd covered this elsewhere but forgot to do so here. 2004 Crossfire auto. Stuck in Park but that can be remedied with the ballpoint pen trick. Car can then be driven but lurches into gears and sticks in limp mode. RCM has been re-soldered and one relay replaced (prior to that, it wouldn't start). Generic OBDII reader produced 0705 code. iCarsoft scanner, set to Merc SLK (170) 320 ,produces the 2313 code stated above. I haven't checked the condition of the cable and connector to the TCM yet, as I'm unab;le to access it currently due to where the car is parked. I'd hoped that the 2313 code would have helped identify where exactly within the transmission comms was responsible for the bad behaviour.