560SL Anti Theft Alarm System

I have a ghost in my 1989 560SL. What seems to be the factory alarm (there is such an item listed on the original sticker I have in my possession)is going crazy. The headlights blink and will not stop. I have tried to deactivate the alarm at both doors and at the trunk using the "master" (red dot) key to no avail. I have removed fuse #11, which also disables my central locking. As a side note, may be related, the door switch on the driver's door does not seem to work (ie, dome lights do not come on when driver's door opened, headlight "on" warning buzzer does not work, etc). Any input would be greatly appreciated.