I own a 1992 300CE with 81,000 miles on it. The problem i am experiencing is a annoying and embarrasing chirping sound from under the hood. I have a new water pump and serpentine belt and new shock for the belt tensioner. At times the noise is loud and the belt is free of fluids etc. Any suggestions are highly appreciated.Other times the noise goes away for a day only to return. I had a good reputable mercedes shop look at it and they replaced the shock for the belt tensioner but the noise still comes back a lot of times.
Thanks for any advice that anyone can give.
Phillip