Question about 2000 Mercedes-Benz C-Class

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Reset alarm on 2000 Mercedes C230

I have a rather unusual problem. i do not have the manual key to my c230, only the remote key. for some reason my car would not unlock and i had to call a locksmith to pop it open. now when i turn the engine on, it starts, however the alarm goes off and none of the electric feature inside work. i can't even open my trunk to take the battery out. how can i reset the alarm? We have a 2000 mercedes c230 kompressor and when we get out of the car and lock it the alarm will start to go off after about a minute and we have to crank the car to reset it. It just started to do this, any suggestions?

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Disconnect the battery lead at the starter motor.Leave off for a few hours then reconnect it.It should reset it for you.

Posted on May 18, 2009

  • sscorpion34
    sscorpion34 Dec 26, 2013

    First you must try to disarm the security system by using the manual key that is in your remote by pulling the clip in the back of it and then pull the metal key that holds your key chain..Use that key to unlock your door and disarm it, If that does not disarm it, go to your trunk and use the key in there by turning it clockwise till it's in a vertical position, that should disarm it, then disconnect the battery for a few minutes and reconnect, that should reset the alarm system,. If you continue to have problems with it I recomend that you visit it your local MB dealer or specialist for a computer system diagnostic and update.

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Posted on Jan 02, 2017

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