Mercedes Tech question
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Super Member
Joined: Aug 2007
Posts: 950
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From: Maui, Hawaii
CLS63, GLK350
Mercedes Tech question
I think I know what is causing my alarm to go off. Please let me know if my conclusion is possible. I have a 2003 SL500, the dealer determined that the body motion sensor was causing the alarm to go off and replaced it. Well the alarm still goes off. I think that the Active body control system is causing the alarm to go off. I think that after I turn off the car and set the alarm the suspension settles sometimes within minutes and sometimes a little longer depending on the surface I park on. This pressure loss is moving the car and causing the alarm to go off. Mine must have a pressure loss that is higher then it should be. The car often levels itself when I start it. Is it likely that the ABC has a out of range pressure loss when it is shut down and that would cause the car alarm to go off because the motion sensor reads the movement as the car being jacked??? Now if this is the case can the dealer measure this and then fix the ABC so it doesn't cause the alarm to go off? Another reason I think this is happening is that I've set the alarm in the garage and a few minutes later it goes off. I unlock it and then wait a couple of hours to make sure the suspension has settled all it will and then I go back out and set the alarm. Guess what it now does not go off. Any help in figuring this out would be great. The dealer has done everything to make sure the alarm is working but I now think they are looking at the wrong cause for the alarm going off. Its not a bad sensor or switch its a problem with the ABC??
Last edited by SL2003driver; Oct 25, 2007 at 10:01 PM.
Senior Member
Joined: Aug 2004
Posts: 263
Likes: 11
BMW E30. I've turned to the dark side.
have them check version coding. you can usually bounce on a car, within reason, and it will not set the alarm off. I doubt any normal ABC settling will be enough to cause and alarm.
I am not aware of any sensitivity adjustment other than version coding it out alltogether.
I am not aware of any sensitivity adjustment other than version coding it out alltogether.
