Question about 2004 Mercedes-Benz CLK-Class

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2004 Mercedes-Benz CLK 320: Alarm issue

Since early yesterday afternoon the alarm on my CLK has been randomly going on and off. At times it just makes a quick sound. At first I thought their might be a bird in my garage but then I realized it was my alarm. It became so annoying that I had to remove the three fuses that were link to the Anti-theft alarm (fuse #s 8,9,41).
I have extended warranty but I don't think it covers any alarm related problems. Does anyone know what could be the problem and how I can solve it?
Thank you!

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  • jli126 Dec 09, 2008

    OMG I have the same exact problem.

    It's 2004 CLK too..

    At first i thought it was the battery but it isn't...

    My neighbors are so frustrated

  • Anonymous Feb 02, 2009

    I am also having the same problem in my 2004 CLK 320. The alarm goes off after I lock the door. Sometimes the lights flash and then when I try to open the car and reset the lock, the alarm goes off. Does anyone have an answer?

  • jordanliu77 Feb 11, 2009





    OMG i have the exact same problem too,,,, maybe any one know how to link all the people who has the same problem. and make benz pay for their mistake .... i dont know how much it will cost me ........ anyone know how to fix it.... my car is also 2004 clk ...................there must be some mistake they made on this car...... 

  • Anonymous Feb 17, 2009

    I have the same problem...Alarm goes off randomly 20004 CLK 320

  • photosbyag Feb 18, 2009

    I have the exact same problem. It started a few day ago, with only the lights blinking, but yesterday the alarm went on-and-off all by itself. I tried unlocking the car, locking the car, inserting the key in the ignition, starting the car, opening the trunk & hood, but nothing could make it stop. It just continued going on-and-off for about 5-10 minutes straight, then it just stopped as suddendly as it started.

  • mecelen Mar 31, 2009

    i have same problem too.help me please

  • paffran
    paffran Apr 18, 2012

    The first thing to do is to check the battery. The alarm goes on and off as do the lights in fairly random way as the battery charge level starts falling towards the critical level.

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I had the same problem in my 2004 CLK 500. I took it to the dealer and they said it was shorting out and it needed a new alarm siron. The repair cost was $450. What a rip off.

Posted on Jul 31, 2009

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I changed my key and the problem disappeared. I think there may have been an electrical short in the key electronics. I'm happy again :o)

Posted on May 29, 2009

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