M.B.DOC, I saw this thread, in which you said that some '85 models had problems with the air recirc. component of the turbocharger system that would cause whistling at certain RPM's:

http://www.peachparts.com/shopforum/showthread.php?threadid=4486

I'm experiencing the whistling problem, and was hoping you or others might be able to shed some light on this. Thanks!

Chris Straut
'85 300D, 92k