Strange grinding/rattle goes away when wet...
Thread Starter
Newbie
Joined: May 2019
Posts: 3
Likes: 0
e350
Strange grinding/rattle goes away when wet...
Hello, I recently purchased a 12 E350 base with 174k miles. The car has a strange rattle/grind when on the accelerator. My local Mercedes shop will be looking at it sometime next week. This morning I drove over a big puddle of water and the symptoms went away, it was very smooth. So this points to something that needs lube.. any suggestions? wheel bearings were repacked in the last month. I can do most of the work myself, but some direction would be helpful.
Thank you.
Thank you.
Banned
Joined: Oct 2005
Posts: 4,957
Likes: 1,640
I can't imagine a Flex Disc causing a rattle noise or definitely not a grinding. That is easy to inspect, and unless it's cracked or badly worn I don't think that would be it. The mounts are hydraulic and if collapsed you can experience a lot of noise that comes right into the cabin.
Senior Member
Joined: Jun 2012
Posts: 431
Likes: 44
From: Portsmouth, VA
2010 E350, Sold 1998 C230
I can't imagine a Flex Disc causing a rattle noise or definitely not a grinding. That is easy to inspect, and unless it's cracked or badly worn I don't think that would be it. The mounts are hydraulic and if collapsed you can experience a lot of noise that comes right into the cabin.
MBWorld Fanatic!
Joined: Oct 2010
Posts: 5,141
Likes: 1,293
From: Southern US
2010 E550, 273 Engine: 2012 S550, 278 Engine
Banned
Joined: Oct 2005
Posts: 4,957
Likes: 1,640
It’s mounted on the front of the driveshaft and basically isolates vibration from the connection at the transmission. It also softens the acceleration torque when you apply the gas to move out quickly. They do wear out from use since it is not a hunk of metal.
