Does it produce the alerts when the car is not running? Idling but not moving? Key in accy position? How about pulling up next to the C230 in another car, plugging the detector into that car and pointing it at the C230 while it's running and not running.

There's a bunch of scenarios you can test to help hone in on the exact problem.

My hunch is "dirty" power - a loose connection that's arcing. I used to have a car that registered false alarms all the time. Turned out it needed a capacitor in the power supply to the cig lighter...

__________________
-Evan


Benz Fleet:
1968 UNIMOG 404.114
1998 E300
2008 E63


Non-Benz Fleet:
1992 Aerostar
1993 MR2
2000 F250