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Greg, Technician
Category: Mercedes
Satisfied Customers: 7285
Experience:  Automotive diagnostic tech
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Car alarm keeps going off on its own

Customer Question

car alarm keeps going off on its own
Submitted: 2 years ago.
Category: Mercedes
Expert:  Greg replied 2 years ago.
Hi . Most common issue for this is for the bonnet switch to go bad and is always open ,causing the immobilizer system tothink someone is trying to open the bonnet.. But to be sure to can hook up a scan tool from Jeep and check for malfunction codes in the management system, and in live mode check which door .liftgate or bonnet switch is not closing this is the surest and best way or you can test each switch on one of the 6 switches . If the inner dome light is not on when all doors are closed and the ajar warning light is off then the bonnet switch is most likely your problem , if all switches are good then you may just have a bad movement sensor switch , which will also show up with the diagnostic scan tool data.. Need any follow up help then please get back to me with the reply button, and not the poor or bad service.This way i can get back to you or suggest another expert if needed.If i do not get back to you then i may be off line, and when i get back online i will get back to you..Your deposit does not pay me until the answer is rated in a positive way,Not rating or a bad rating does not constitute a refund.If you are not happy or you have sorted out your problem before the answer then please let me know with the reply button .Kind regards Greg.