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Merc E230 false alarm - petrovitch
Several times my alarm has gone off for no apparent reason. The dealer says he had reprogrammed it but if it happened again I need a new ECU ! Of course it happened again yesterday. Anybody know how to disconnect the siren?
Merc E230 false alarm - Dynamic Dave
I assume the dealer checked the pin switches on each door? Also the most common thing to falsely trigger an alarm is the bonnet pin switch - especially in hot weather as the heat makes the metal expand. Before you start disconnecting things, check the basic stuff. It's something the garage *may* have overlooked.
Merc E230 false alarm - Collos25
Switch the internal alarm off at night and see if it still goes of,Something as simple as the air vent open or a fly can trigger Merc alarms