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Loud beeping noise coming from engine compartment.

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Old 05-10-2023, 06:05 PM
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2007 C230 Sport
Loud beeping noise coming from engine compartment.

Hello everyone, I have a 2007 C230 Sport that I recently replaced the timing chain in. After getting everything put back together I cranked the motor over and now I hear a loud beeping sound coming from the engine compartment. The sound is definitely not coming from interior speakers. The car cranks but hasn't fired yet, I've only turned it over a couple times due to the unsettling beeping sound. It stops making the sound once the key is turned back to the "on" position. Anyone have any ideas what it's from?
Old 05-10-2023, 06:54 PM
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Alarm siren in the fender well?
Old 05-10-2023, 07:32 PM
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Originally Posted by E55Greasemonkey
Alarm siren in the fender well?
It sounds like it's coming from the ECU. What would cause the alarm to go off in the fender well?
I'm going to take a video with sound and post it on YouTube, I'll post a link to the video

Last edited by Camspar76; 05-10-2023 at 07:35 PM.
Old 05-10-2023, 07:40 PM
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YouTube link

Old 05-10-2023, 07:41 PM
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The sound repeats the entire time I crank the motor over.

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