Re: What did you do to your Crossfire today?
Replaced the alarm/siren with Mercedes part# 219 820 32 26. Works well. Three beeps when locking with the key fob, one when unlocking. Interestingly, if you unlock the vehicle and do not open the door within 40 seconds, the doors lock again. If you unlock with the key fob and open the doors and then close them, there is no automatic door lock feature. The old alarm had gone off three times randomly in the last 2-3 weeks.
On to the sticky key fix...