Need Immediate Help for Antitheft!!! - PeachParts Mercedes-Benz Forum

bio350 · #1 08-22-2010, 05:26 PM

I drove my sons 87 300SDL to work (24 hrs). I locked the car with out problems. When I unlocked it the doors unlocked, but then the headlights and taillights began flashing like the antitheft alarm....no horn thankfully.
I have tried everything and it seems that I may have the wrong key to shut off the antitheft. I can still start the vehicle but the lights keep flashing.
I unhooked the battery, let sit for an hour and tried it again, but as soon as I open a door the lights begin flashing.

Can someone please tell me where the antitheft disconnect is so I don't have to drive my 2 hour commute with my lights flashing?
I already attract enough attention, I don't need this too!!!!

Biodiesel300TD · #2 08-22-2010, 05:47 PM

I'm sure someone can give you better advise. But I'd look at the fuses, and see if you can find one for the alarm system and pull it. Or if need be you could pull the fuse for the lights, though you may not have turn signals or brake lights that way depending on how it's wired.

NJ300sdl · #3 08-22-2010, 06:17 PM

Believe that the controler is in the front passenger footwell. Remove carpet than remove forward floor panel for access. Unplug.

bio350 · #4 08-22-2010, 06:49 PM

You were right!!! I knew I had seen that thing before!!! Just couldn't remember where. That will at least get me home without any unwanted attention.
Thanks again.

John Schroader · #5 08-22-2010, 07:23 PM

Really a long shot here, but still a pretty good story. A few years back my wife and I were on a road trip, driving a Nissan Quest. Had driven the car for years and didn't even know it had an anti-theft circuit. Stopped in a handi-mart at about midnight and, to our complete surprise and dismay, the alarm went off when I opened the door. Lights flashing and horn tooting. Key would not stop this, nor would key start engine. I was about to smash something to make it stop when a fellow came running up and said "Quick, give me your key". At that point I would have been happy t try anything. He took the key, inserted it in the door lock, twisted it back and forth some magical number of times, and the alarm quit. Said that the exact same thing had happened to him once (in a Nissan Quest) and his wife came up with the solution. I never had it happen again, but if it does, my first attempt will be locking and unlocking the door again and again until the alarm quits or I set the car on fire and walk away. I think the world would be a better place without car alarms.

bio350 · #6 08-22-2010, 08:00 PM

John,
I had seen a similar story like that on here and tried that numerous times.

I guess my son actually has numerous "types" of keys. Ones with red dots on them and others without. Some just start the vehicle but can not lock or unlock the vehicle (valet keys). But this one actually can lock, unlock and start the vehicle but for some reason will not trigger the alarm to shut off.