My 300E's alarm goes off(lights flash and horn honks) instead of simply arming itself whenever I try to lock the doors or trunk(happens with both the key and the door lock knobs). Has anyone seen this behavior before?

It seems to have started happening when the battery went low because of a worn regulator a few weeks back.

Thanks,
Chuck

I've had it. Still have it. It's related, in my case, to a worn key issue. I didn't want to mess with it so I finally disconnected the horn lead and I keep an eye out for the flashing lights.

__________________
62 220sb
67 250S
72 280SE 4.5
74 280C
77 300D
82 240D
85 190E 2.3
86 300E RIP 12/28/09
85 300SD
92 300D 2.5
00 E320 Current
Over 1,000,000 miles in Benzes, Since66

....and a whole passel of BMW 2002 and Tii

Moved to Tech Help.

__________________
Chris
2007 E550 4Matic - 61,000 Km - Iridium Silver, black leather, Sport package, Premium 2 package
2007 GL450 4Matic - 62,000 Km - Obsidian Black Metallic, black leather, all options
1998 E430 - sold
1989 300E - 333,000 Km - sold
1977 280E - sold
1971 250 - retired

"And a frign hat. They gave me a hat at the annual benefits meeting. I said. how does this benefit me. I dont have anything from the company.. So they gave me a hat." - TheDon

Factory Alarm System Issues
http://www.peachparts.com/shopforum/diesel-discussion/150748-factory-alarm-system-issues.html#post1143583