Just disable the bloody thing. It does basically no good anyway. (Think about it- when was the last time you heard a car alarm - ANY car alarm - and rushed out to go see what was the matter?) Find the black box labaled "Becker" and unplug all connectors. On a W124, it's located under the passenger's feet against the firwall, next to the red SRS connector. I'm not sure where it is on a W126 but I bet Kleb or someone else can edify us.
If you really want to diagnose & fix it, I'd start by replacing the switch contacts on the driver's lock cylinder. (yes, the switch is available separately, no you don't need a whole new lock, like I had been told many moons ago...) =) -Dave M. > ------------------------------ > Date: Mon, 06 Mar 2006 08:23:53 -0600 > From: "Roger Conlon" <[EMAIL PROTECTED]> > Subject: [MBZ] 300SDL Alarm System > > > Last night I changed a broken accelerator pedal on my 87 300SDL. > All I did was remove the two floor mats, then replaced the pedal. > > Now this morning went out to warm up the car for the wife, open the > drivers side car door and the alarm starts going off, nothing I did with the > master key with red dot would help. > > Locked unlocked the car, started and shut it off, lock an unlocked the alarm > was still sounding or would start again. > Not much help reading the owners manual. > > Is there a wire or switch I could have knocked off putting the floor mats > in? I started the car after replacing the pedal an move the car and it was > fine. Any suggestions? > > Roger