I've been having a problem with my car lately. Every cold morning that I go to start my car, it starts making a loud sweeking noise. I think its the belts but i'm not sure. My neighbor gave me some sort of spray to put on it, but that didn't solve the problem. Unless i sprayed the wrong belt. Can anyone help me? I have also looked up this issue on the internet and it seems that it might be my belt tensioner, but I don't know where that is. Does anyone know any good site that might show the insides of a C280? Thanks

 

Does this picture show it? Belt Tensioner

https://mercedesforum.com/upfiles/22...C790D0A823.jpg

 

I was going to say the same as your neighbor. Use the spray. You might have spraied the wrong belt. Try other ones or a local shop and have them look at it.

 

what belt should I be spraying?