1987 300D "shhhhhh, shhhhhh, shhhhhh" Sound
I thought it could have been exhaust when I first heard it bouncing off buildings and bridges but now that I have opened the hood I can tell it's coming from the engine.
After running a few minutes it quieted down a bit but was still there just audible over the engine.
It almost sounds like a steel-bristled brush running back and forth over concrete.
Just by locating it by hear it almost sounds like it's coming from an injector.
I don't believe you can adjust the valves on this engine. Is that correct?
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