mjcecil

All, my '10 E550 4Matic suddenly started making a pulsing noise that sounds like it's coming from the front left. I'm thinking something in the brakes, or wheel bearing.

Noise is muted if I'm on the brakes, or of I'm accelerating. Noise gets worse if I very gently press the brakes.

I'm attaching a link to a couple of videos that I took, so you can listen.

What do you all think?

https://www.dropbox.com/sh/3ihkhks79gh0kdd/AACZKX4VmPFx70yQORJJUe9_a?dl=0

Plutoe

Your FUYAA has short comings. Put the car on a lift and then correctly start the diagnosis process.

arcnspark

Guessing sticky brake pistons not retracting properly.

Arrie

Have you checked your lug bolts are tight?

mjcecil

How utterly embarrassing. That was the trick. All good now.

Also, for fun, literally all of the lug bolts were loose. One was flat missing (unsurprisingly, in the noisy corner).

I just pulled the car off the shipping trailer Tuesday. It didn't even occur to me THAT would be an issue.

Arrie

It all starts with basics. MB factory wheel are centered by the hole in the middle of the wheel to the shoulder in the hub. This keeps wheel well in place and you can drive without bad vibrations but you will get noise when wheel turns against the bolts.

Good it is fixed now.