SilverBlownW211

My E55 makes two squealing/whining noises, but I'm more concerned about only one.

The first noise is a somewhat loud squeal that only happens about 3-5 seconds after I start the car on a cold morning after the car has been sitting for at least 8 hours. It lasts between 3-10 seconds, depending on how cold/wet it is. The belt looks great, and it has the correct tension (according to my local Independent Mercedes shop). Now the car had a bunch of greasy engine shine on it when I bought it, so could it just be that stuff on the pulleys? It is getting better the more I drive it.

The second noise is a faint, high-pitched whine when I'm just leaning on the gas at around 1500-2000 rpm, but it goes away as soon as I give it more gas and the blower engages. Could this indicate a problem with wither blower pulley bearing or the blower clutch?

RoldGold

Mine does the same, curious as well.

03'55AMG

I think the squeal is def. pulley related, and the whine, sounds like a pump? That is my best guess.

shardul

iTrader: (1)

Seems like the idlers pulleys are going bad

SilverBlownW211

Thanks guys. I was thinking about pulling the belt and playing with all the idlers to see if any made noise or felt odd. I also considered getting the Belt Wrap kit, since that includes new idlers and will prepare me for possible more boost in the future.

The whine is weird because it's only under light acceleration, but goes away as soon as I lean on it a little more and the supercharger engages. Could this be the blower pulley bearing going bad?

Carterhkrs

Does it sound like his car when u start up?

If so, its all good

numismatic

That video is more or less how my 2006 E55 sounds.