05 MB Komp

Hey guys,

My 2008 C300 sat for a couple weeks while I was on vacation and now it is making a strange sound that is coming from the motor. It kind of sounds like a chirp, it happens when I am driving and while it is idling.

Here is the weird part though, it only does it after about 5 minutes of running and it will go away after 10 minutes or so.

It is driving me nuts and I need to figure out what is doing it.

Any ideas?

Thanks

j21importer

the belt is common for this type of noise after sitting for a while. i have corrected it many times by using some needle nose pliers and very lightly touching some sand paper to the belt while its running. ( Be careful, dont need to go overboard just gently against the belt for 2-3 seconds should do it, if thats what your problem is. Otherwise it could be the idler pulley next to the water pump.

05 MB Komp

The inside part of the belt or the outside part?

I will give it a try tonight.

Thanks

j21importer

inside part with the ribs usually does it, good luck.

2012c350

As was mentioned, it definitely sounds like a belt/pulley issue. But before I'd apply any lubricant or 'sand' a belt, I'd just let it go for a few hundred miles and see if it goes away naturally...I'm thinking it most likely will.

vanbong84

Lucky u my belt was half shredded so I had the chirping sound nonstop. Thank god for warrenty

olive1

For me, I hear a metallic sound at the back of my car... It's a new w204 2012... I become really nervous with this!