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A 1989 Mercedes car alarm may go off unexpectedly due to several factors, including a weak or failing battery that causes fluctuations in power, faulty sensors that misinterpret vibrations or movement, or issues with the alarm system's wiring or components. Additionally, extreme weather conditions, such as temperature changes, can affect the sensitivity of the alarm. Lastly, if the key fob or remote is malfunctioning, it could inadvertently trigger the alarm. Regular maintenance and checks can help mitigate these issues.

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1w ago

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