Alarming Problem! '89 560SL
 

Recently disassembled dash/glove box etc. with battery disconnected. At reassembly, horn sounded & lights flashed! Good job I had removed the hard top or I'd have busted my scalp as I headed to orbit - man, talk about a surprise!
I disconnected battery, found the offending horn, pulled connector off and tried again. Lights still flashing. I locked and unlocked the doors per the manual but I can not get the system to reset. There is a relay in the alarm controller click-clacking. Anyone know how to fix my girl?