Question about 1999 Mercedes-Benz M-Class
Checked fuse and swapped relay with rear defrost relay. Nope.. Do you need key on to check power to horn? And is there any way to check the switch on the steering wheel?
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Posted on Jan 02, 2017
About four things to do, first check voltage at horn with key on and button pressed. If voltage there try moving the small gap screw back and fourth a few times. If that doen't work replace horn. If no voltage check fuse and horn relay, you should be able to hear the relay click when you push the horn button, If not and fuse is ok. Switch relay out with another on on the car. If that doesn't fix it check the horn button for continuity.
Posted on Dec 27, 2008
There is a stepping motor in the dash, deep inside, that controls the vents for the a/c system. When it breaks, as it will, it goes on and on and makes a clicking sound. You may observe that your vents don't work like they used to. I broke down and had the dealer fix it, as I don't want to tear into the dash. It was pretty expensive, but they fixed it. I would try an independent MB service shop.
Posted on Aug 27, 2009
remote controls trasmit frequencies. I believe you hold your home remote control device within 2" to 5" of the car's remote control buttons. You select one button in the car which you wish to use as the garage access remote, and press it simultaniously with the home remote control button long enough for the blinking light to go on and blinks for 5 seconds. Then you are programmed. Test it to make sure it worked. If failed, try again. If it doesn't work, any Mercedes Dealership should do it for you FREE. Some of them now push for some money, but you tell them that you called Mercedes and based on your zip code they said you should go to this dealership and it will be done for FREE! They will take care of it immediately.
Posted on Oct 17, 2009
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