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M272 06 Mercedes e350 serpentine belt question

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Old Mar 9, 2018 | 11:03 PM
  #1  
shawn011274's Avatar
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2003 CLK 320
M272 06 Mercedes e350 serpentine belt question

HI guys,

I am new to this site and have a question regarding the serpetine belt and tensioner pulley positioning on w211 M272. I have installed a new belt but the belt hang of the tensioner pulley by 1/8 inch (see pics). Is this normal? I keep realligning the belt but it ends up slightly hanging off the pulley.

Here is where I removed some tension on the pulley and slid the sepertine belt over on tensioner pulley
https://imgur.com/a/cdaHg

Here is what happens after I run the engine for a few minutes
https://imgur.com/a/e9pbV

Is this the normal position, or should the entire belt sit on the pulley and not be off by 2/16 of a inch


After running, it slides over
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Old Mar 12, 2018 | 01:24 PM
  #2  
shawn011274's Avatar
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2003 CLK 320
My apologies

I replaced the entire tensioner pulley assembly, not just the pulley.

Last edited by shawn011274; Mar 12, 2018 at 03:21 PM. Reason: Incorrect info
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Old Mar 12, 2018 | 02:19 PM
  #3  
Racin_fool's Avatar
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Joined: Feb 2007
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From: Dallas, TX
2008 E63 wagon (1 of 62)
Replace the engine belt tensioner assembly, not just the pulley.. the pulley alone will solve nothing unless the bearings are failing.. There was a "fix" years ago to shim the tensioners at the front engine cover, but that was just a band-aid in my opinion..
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Old Mar 14, 2018 | 04:48 PM
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shawn011274's Avatar
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2003 CLK 320
I am done with MB, apparently now I have three additional issues:

1. Oil in the coolant - replaced oiler cooler seals (supposedly need new oil filter housing, cooler and seals)...thats just the start
2. P2006, Intake manifold runner stuck (Have to replace entire manifold - Just lever is a bandaid)
3. Balance shaft showing possible wear - known 4k repair for a car worth 3-5k

* my girlfriends crappy Nissan versa has more miles on it and does require this much expensive maintenance or have these many issues. As a matter of fact i have owned many cars that don't have these type of issues, let a lone luxury cars.

I think I am going to sell the car and stick with my Lexus. Thanks for the help...good luck :-)
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