86 560sl.

Sun. AM Car in driveway, unlocked. All of a sudden the alarm goes off for no apparent reason. Before I could get to it to turn it off, the alarm quits not to be heard again all day.

Mon. AM Walked around the car to get in and the alarm goes off again. I had not done anything, not even sure I had opened the car door. I put the key in the ignition, didn't kill the alarm. Started the car, alarm still sounding. I put the key in every lock on every door and rear deck and the alarm wouldn't go off. It seems to be on a 30 sec cycle where it would stop itself but within a few seconds would start up again.

I disconnected the battery and went to the bank in my truck. About an hour later I reconnected the batter and the alarm immediately went off. After it stopped, it hasn't gone off again.

Sheesh, I just now convincing my wife to take this car occassionally but this will pretty much kill that.

Any ideas on what broke or better yet how to take the alarm out of the loop altogether?

Thanks.

JB