P0705 is not a Chrysler code; It is Mercedes: Transmisiion Range Recognition Switch implausible or invald code.

Coupe or roadster ?? Has anything spilled on to the shifter ?? You definetly need to open up the footwell and check the condition of tthe TCM! Bad TCM or bad coding in the TCM will set that code, but usually from what I know it is caused by the SLA Shift Lever Assembly.

Start the car, let it warm up a little bit and them move the shift lever through all it's positions, PNRD and while in drive, foot on brake idling go + and - with the shift lever while in D. Maybe just maybe you can unstick the switch.

This problem may be bad electrical wiring or corrided connectors.

Hopefully it will correct when you clear the code, but I'm doubtful. Good Luck.