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Belt Replacment 97 E300D

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Old 05-07-2010, 11:46 AM   #1
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Belt Replacment 97 E300D

I replaced my S-belt when I was at all my fuel lines about 6 months ago.
Today I took it off and ran the engine because I have a Rough idle that is bad enough that it shakes my review mirror. It ran much quieter but not totally vibration free.
I put the belt back on and now the noise seems even louder. When it was off I checked all pulleys and they ran free without any binding. I put a screw driver between the Spring tensioner and the shock. The nailing noise was gone. I called MB and I asked about the shock and how my times the part changed. He said it's been up reved 3 x's.
A guy on this link says to align the belt. How do you do this? I just looped mine around the path according to the drawing.
He also talks about a change in the Alternator pulley, that requires a different shock.
Have any of you changed out your alternator pulley? Do any of the other pulleys wear out?

I am buying a K-40 relay and S-Belt Shock. Do the parts shops sell the same items as the Stealer? These two parts are about 70 dollars than Autohaus.

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Old 05-07-2010, 09:31 PM   #2
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Belt Shock

Well I just installed my new OEM belt Shock. The loud nailing is gone so I am happy with that.
Kind of bummed it did not cure all my vibration issues.
On a scale of 1 - 10 and 10 being the worst

Driving down the road: 3
In Park 700 RPM: 7
In drive with foot on Brake: 5
In N. : 7
In Reverse: 9
In Park 1500 RPM : 4

The car has 108K miles and is a E300D.
Can everybody tell me at what mileage do the motor mounts go out?

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97, alternator, belt, change, e300, e300d, idle, issue, k40, parts, relay, replace, rough, shock, tensioner, vibtation

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