Alarm sound from battery area--what is that?


Asked by Jun 18, 2014 at 06:37 AM about the 2004 Mercedes-Benz C-Class C 240 4MATIC AWD Sedan

Question type: General

Awful sound from battery area intermittent.

1 Answer


The sound comes from the alarm system that is installed below and under the battery area. The device has it's own battery that when weakening will make the sound intermittently. It is separate from the battery system because if thieves cut the battery cable it will continue to alarm. To replace, it costs $177, plus labor. For a 10 year old car, it's not worth it so it can be removed (for $100.00 labor).

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