still think your noise is motor mounts seeing as the compressor is mounted at the bottom on the left side.one good way to check is to get a floor jack under the oil pan[use pce of 2 by 4],turn on engine and a/c to where you feel vibration and then jack the engine up a little and see if noise changes.

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David S Poole
European Performance
Dallas, TX
4696880422

"Fortune favors the prepared mind"
1987 Mercedes Benz 420SEL
1988 Mercedes Benz 300TE (With new evaporator)
2000 Mercedes Benz C280
http://www.w108.org/gallery/albums/A...1159.thumb.jpg

Indy said motor mounts are in good condition.
He said they look almost new.

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2010 W212 E350 Sport
1996 W210 E320 (220K miles)

So he did replace the tensioner? What about the little shock absorber on the tensioner?

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2012 E350
2006 Callaway SC560

motor mounts can look new for a long time....he needs to either measure them

or pull the passenger side (10 minutes) and take a look

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1989 300ce 129k
( facelifted front,updated tail lights, lowered suspension,bilstein sports, lorinser front spoiler, MOMO steering wheel, remus exhaust,stainless steel brake lines). (Gone)

1997 s320 154k (what a ride). Sold with 179k miles. Replaced with Hyundai Equus

1994 e320 Cabriolet 108k



1972 280se 4.5 153k Owned for 12 yrs, sorry I sold it


[/SIGPIC]

Hi, it could be that the discharge hose from the compressor to the condenser is touching somethign and the vibration from the compressor is being amplified. This happens sometimes. be sure it's not touching the inner fender for example.