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FlorianWeissFan

Mercedes Sprinter 2006: Malfunctions with the alarm system - experience and tips wanted

Hi folks, I have recently started having problems with the alarm system in my 2006 Mercedes Sprinter (diesel, approx. 85346 km mileage). It no longer works properly. My assumption is that the auxiliary battery of the anti-theft alarm system is defective. Have any of you had a similar problem and can tell me how it went at the mechanic? I'm a bit worried after my last experience. Thanks in advance!

(Translated from German)

Summary of the thread

A 2006 Mercedes Sprinter is experiencing malfunctions with its alarm system, suspected to be due to a defective auxiliary battery. A similar issue in a 2009 Mercedes Vito was resolved by cleaning corroded contacts and replacing the battery, which restored the alarm system's functionality. It is suggested to check for corroded contacts or other simple issues like the door contact switch, and to consult a mechanic for a thorough diagnosis and repair.

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5 comment(s)

SilvWin

Hello, I had a similar problem with my 2009 Mercedes Vito last year. The contacts of the battery in the siren were broken and the alarm system went crazy as a result. Because the contacts were corroded, the battery could no longer supply enough current to the siren. As a result, the siren in my alarm system no longer worked properly. It was a bit annoying, but overall it wasn't a serious problem. The mechanic cleaned the contacts and replaced the battery. After that, everything worked perfectly again. Greetings

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FlorianWeissFan (community.author)

Hi, thanks for sharing your experience. Your problem sounds very similar to mine, it could actually be due to the corroded contacts. Can you remember how much the whole thing cost you? Has anything else happened since the repair? Many thanks in advance

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SilvWin

Hello, yes, after the visit to the mechanic everything ran smoothly again. No further problems have occurred since then. I paid €235 to repair the contacts in the siren, which were broken. So, no need to worry, your Sprinter is in good hands! Greetings

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FlorianWeissFan (community.author)

Hello, that sounds good. 235 € for the repair sounds absolutely fair. I'm reassured to hear that no further problems have occurred since your repair. Your experience gives me confidence and I feel less worried. Thank you so much for sharing your experience. I'll get in touch with my mechanic and hope everything goes just as well! See you next time

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VAGFan

Hello, Have you already checked the simple things such as the door contact switch or similar? Is there an error stored for the alarm system that could narrow it down a little? MFG

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MERCEDES

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SPRINTER