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Old 12-09-2010, 01:11 PM
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Join Date: Dec 2010
Location: Portland, OR
Posts: 1
W202 94 C220 speed dependent whine

I have a 1994 C220 with 155k on it, automatic transmission.

I began to notice a whine that sounds like a power steering pump thats low on fluid when I am driving between 25-45MPH. After 45, I cannot tell of the sound goes away or if its getting masked. It is not a loud sound, but is noticeable.

The sound is dependent on speed, NOT RPM. The pitch gets higher as I go faster, not as the gears change.

Transmission fluid was replaced 2 years ago by a Mercedes mechanic while it was owned by the previous owner.

Any thoughts? I heard that it still could be something in the transmission since the sound goes away when its in its final gear.

Thanks, I look forward to getting involved in the forum!

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