SL/R230: Interior Motion Sensor
http://www4.mercedes-benz.com/e/cars...soleunten.html
"If you lock your vehicle and people or animals remain in the vehicle, or
the side windows remain open, then you can deactivate the interior motion sensor. This will prevent false alarms".
I also think that same applies when car is parked top-down in order to prevent false alarms..
George
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