The alarm system of my 1986 300e seems to go off randomly. Happened twice in the past year but now it has happened twice in a week. I live in a rather tame neighborhood with a lot of nicer cars in the neighborhood to rumage through so I don't think anyone is trying to break in. It has always happened at night so maybe it's due to the cold (40's). There is some night moisture around here (fog & dew) but has yet to happen while it rains. Any suggestions of where to start trouble shooting. Many thanks!

John H

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E55, 300E, 65 Hipo Mustang, 66 Shelby GT-350, 69 Mach I, 66 Fairlane GT Conv., etc