Rattling noise like a spark
Thread Starter
Newbie
Joined: Jul 2017
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C-450
Rattling noise like a spark
My car C 450 is making a noise is like a spark that comes from the back, it is intermittent and it does not happen all the time. Any advice/idea?
here's a video of the noise. Thanks.
https://youtu.be/ivU9xLi_HF0
here's a video of the noise. Thanks.
https://youtu.be/ivU9xLi_HF0
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From: Manchester, UK
BMW e89 Z4 sDrive 35i & MB S205 C200 AMG Premium Plus
Ticking in the cabin could be anything. Remove everything from the car, coins storage under floor items etc and if it's still there Have someone else drive the car while you're in the back so you can trace the noise.
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C-450
I removed everything. it is coming from the speaker area. It is worse in good roads when all the other cabin noises are minimal or non-existent I can hear the rattle. It is like two pieces of hard plastic colliding. Sometimes it last 3 or 5 minutes only. Usually during the first couple of miles.
Last edited by alexreq; Jul 12, 2017 at 02:08 PM.
Thread Starter
Newbie
Joined: Jul 2017
Posts: 8
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C-450
It is worse in good roads when all the other cabin noises are minimal or non-existent I can hear the rattle. It is like two pieces of hard plastic colliding. Sometimes it last 3 or 5 minutes only. Usually during the first couple of miles.
Thread Starter
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C-450
I removed everything and had my wife drive me. it is coming from the speaker area. might be from the belt too. Sometimes it last 3 or 5 minutes only. Usually during the first couple of miles. no matter what I press I cannot mute it. it mutes on its own after driving a few minutes. driving me crazy!
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C300 sedan
HAHAHA I can assist with this one
I just came back from this fix LOL
it's coming from the trunk area. Just need to get your service advisor to stuff a bunch of felt tape in the area. They need to take away the panels. that put felt behind and around that area. Best way to test it is to take it around and hide the little speed bumps located in lane dividers. Easy fix good luck
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C-450
thanks l3gendary! that is the first area they checked. I also put felt around the cable and removed the towing thing. I agree it is from that area, but still can't fix it. service department removed everything and they couldn't fix it either.
glad that work for you
glad that work for you
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Junior Member
Joined: Jun 2017
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C300 sedan
it took a few tries from my service department too. But I'm pretty confident we have the same thing. They showed me where it was after all the panels were removed sorry I didn't take a pic at that time. It's not the cable. It's within that device that has a few plastic components touching each other (like rivets etc)...they put felt tape all around those plastic components (not around the cable) and that was the only way to get it. They just stuffed a crap load of felt tape within that compartment and somehow that was the solution
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2017 Mercedes-Benz C300, 2017 Mercedes-Benz GLC300
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From: Massachusetts USA
2017 C43 sedan
Thank you guys. Noise cause discovered! it was the seat belt retractor!
https://youtu.be/W-Cjgq66th8
https://youtu.be/W-Cjgq66th8
