1995 e34 540i with three button key/alarm transmitter i set the alarm and when i tried to disarm,i could not. the only way i could get up and running was to pull the fuse from the module (under rear seat, drvrs. side forward of all other modules at benchseat bulkhead) since then i have disconnected battery, shorted cables, etc. but when i install fuse alarm is activated again. FYI removing this fuse also prevents the OBC from operating.