Mercedes Anti-Theft systems are very temperamental.

Do you have interior motion sensors? If you do, those are the first culprits in alarm malfuntions.

I would recommend reading your computer codes. Every time the alarm is triggered a code is registered why it was triggered.

Check what is triggering the system and see if physically if there is a real reason for it.

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A. Rosich
CL 500, 1998
S 500 L, 1998
E 320 T, 1995 [Sadly sold ]