My 1991 300ce with 35k miles has a clattering sound from the top of the engine. It sounds like the lifters are loose. The car runs good. I change the oil ever 3k miles. The noise is fairly loud when the car is first started and seems to stay until the car is driven for a few minutes. This happens when the engine is cold or when it is hot.

Any help would be very much appreciated.

Tks,
Wally