PeachParts Mercedes-Benz Forum - View Single Post - Please help me with the old security system of my 560SEL

zcc · #1 12-20-2007, 02:30 PM

I have 560SEL 1989. The security system was working fine but not any more. I will tell you briefly how it suppose to work. First of all, if I didn't put the security key in its place the car will never crank (live if the starter disconnected) but will make the ignition on normally. I used to put the little security key (as shown in pictures) in its place till I hear so ticks and the security LED will shut off, then I have about 30 seconds to start the car and it will crank. Later when I put it I still can hear the ticks but the LED will still blink but in a longer interval and I can still crank the car and start it.

Now when put the little security key in its place till I don't hear so ticks and the security LED will stay blinking like I never put the security key, thus, I can never crank the car.

I disconnected the battery for more than a day and got nothing, same problem.

Please tell me if there is a way to fix it or to disconnect it and start the car without it. I want to sell this car and it's in a very good condition/full options.