Originally Posted by mslc791

This morning when starting my '01 C240 I noticed a noise coming from the belt system. It sounded like bearing noise, but I was not sure which pulley was the one to blame. Heard about idle pulley being the cause, but what about others? Like water pump etc. The car has 77,000 miles, so anything is possible. Anybody experienced something similar? Where should I start?

Thanks.