Question about Mercedes-Benz SL-Class
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Posted on Jan 02, 2017
SOURCE: car alarm goes off for no reason
I had this same problem just today.Hhowever, I had the remote in my hand and it would not stop the honking!. Since I could get into the car, I released the hood, opened the master fuse box on the left side, and pulled the fuse labeled "Horn Relay".(On the upper left, there are three large, black, square fuses, it is the third and is labeled in the lid). I waited ten seconds and put the fuse back in, no more alarm, no more infernal honking.
Posted on Jul 20, 2009
Try locking with key in drivers door lock the urn to unlock position and hold 15 seconds should turn off alarm
Posted on Jul 20, 2009
Testimonial: "Done it myself.But still big thank you"
SOURCE: Alarm goes off for no reason
If you can turn off the internal ultrasonic sensors (many cars allow this so that pets can be left in a car) it may solve the problem. If you can't winding a window down a little sometimes will help
Posted on Oct 03, 2009
I have the same problem with my Z3 alarm going off, a local BMW specialist has traced it to the pitch sensor which has been damaged due to a water leak, the wires are also corroded. They have quoted £200 to fix it, but advise that the water leak is sealed first because it'll just get damaged again. I've had a look round and it appears the water is getting in by the off side light cluster via the boot gutter.
Posted on Oct 26, 2009
Not a solution, but details about the same problem with my car: I have a 99 Lincoln Continental and have noticed correlations between certain conditions and the frequency of the car alarm going off.
When it is hotter outside, the alarm goes off more frequently than when it is colder.
The more of a slant the car is parked on, the more often the alarm goes off. My boyfriend's driveway is on an incline and any time I park my car there, the alarm will go off every 30 seconds. If I move the car to the level street, it doesn't go off at all. This has been noticed on other slanted places I've attempted to park as well.
Posted on Nov 12, 2009
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