Quote:
Originally Posted by bruno787
the whining noise could be caused by a defective belt pulley.
my 740 is due for a fix soon, and my previous benz also had this problem. seems common among the plastic pulleys being used nowadays on newer engines.
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Thank you for your input. Sounds very plausible, but the question is how to get it fixed under warranty when "nothing is wrong with it". I just hope that this - along with the vibration gets much worse or goes away completely very soon.