alarm going off minutes after I leave car. SL500

[spinedoc]

Hi guys, did a search for alarm and did not come up with too much. Recently after I turn the alarm on my 96 SL500, probably 10 minutes or so, the alarm goes off. If I shut it off, another 10 min later it goes off. I have to lock the car with the key to bypass the alarm.

Anyone have any idea? Is it the control module or some sensor? If it is the control module how much do these run, and can they be purchased aftermarket?

Thanks.