MrD810

I have a 2018 C300 4matic with Sport Package. There is this rattling somewhere in the engine compartment whenever I pass over holes or bumps on the road. Two trips to the dealer have not resolved this issue. I have a third appointment with a different dealer this time in January/2019.

Has anyone had this issue and if so, what was the cause and also the rsolution to the problem? I am attaching a video captured from the dash cam which in which you can hear the rattling. The thumping is normal tires/road interaction but not the rattling.

Too bad the video couldn't be attached/uploaded (avi file, 284 Mb). Would appreciate your input.

janusgrimnitz

i have rattles... sounds like suspension mercedes has no idea what to do... annoys the crap out of me.

blizzard12

I have described a suspension rattle in this thread: https://mbworld.org/forums/c-class-w...y-options.html

Quote from the thread: "it's a faint rattle or vibration from the front passenger side. Curiously it doesn't happen on bumps, but on the rebound or when the wheel drops. It's best audible when driving over cracks in the road at low speeds. When the wheel drops into the crack I can hear a 'Trrr" sort of noise.
It is not the tire. It only comes from one side and their demos with the same packages don't make this noise."

In my case we eventually found the issue and fixed it.