I've found the horn & it shows P/N # A211 545 10 83 but don't see where to disconnect. location in fuse box drivers side under hood. The siren won't go off;its Sunday no mechanics open.Thanks for any help.

 

youll need to disconnect the alarm siren. not totally sure on this 211 but usually in one of the front wheel well liners behind the front tires. they have tamper proof torx screws on them but you might be able to unplug it without removing it