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Under the back seat on my 86 300E... there's a white round canister on the drivers side with a 3 wire plug on the top. The plug is corroded and not connected anymore. What is this canister for?

Right now the car has so many electrical problems I'm sorting through that I can't tell what it might be for.
 

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About a dozen 1988, 1989, 1990, and 1991 sedans, wagons, 4Matics and 1 coupe
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That's the tilt switch for the alarm system. If someone hooks up a tow truck to the car and lifts one end of it the switch contacts close and set off the alarm.
It may have been problematic because it was deleted from the system by 1988 model year.
 
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