M275 V12 Bi-Turbo Platform Technical discussion relating to models sharing the M275 V12 Bi-Turbo (V12 TT). Including SL600, SL65 AMG, CL600, CL65 AMG, S600, S65 AMG.
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mystery vacuum hose

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Old Oct 7, 2010 | 09:05 AM
  #1  
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2004 s600
mystery vacuum hose

2004 s600. I just changed the spark plugs and when reassembling, there's this 4" vacuum hose attached to the left front of the left charge cooler and I can't for the life of me figure out where it goes. The left cooler doesn't have one.

In the Star library DVD, it mentions a "pneumatic" tube there, doesn't say where it goes, but does say it's "bonded" to the cooler and should not be separated --- whatever that means.

Some help would be appreciated.
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Old Oct 7, 2010 | 09:05 AM
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2004 s600
I mispoke. It's attached to the left front of the right (not left) cooler.
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Old Oct 7, 2010 | 02:53 PM
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From: ca
2003 s600
That measures pressure in intercooler, boost to vacuum.
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Old Oct 8, 2010 | 11:54 AM
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07 E63, 04 discovery
it might be the vacuum line for the boost pressure sensor which is located on the air box cover. check to see that the sensor didn't get broken off in the vacuum line in the process. have seen this before
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Old Oct 8, 2010 | 07:13 PM
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2004 s600
Thanks that's exacting what it is. Someone broke it off in the past and just glued it to the back on the sensor.
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Old Oct 9, 2010 | 12:11 PM
  #6  
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07 E63, 04 discovery
No prob. Make sure that you replace it. otherwise the engine will seem low on power because it won't produce proper boost.
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Old Oct 18, 2010 | 01:02 PM
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W220 S65 AMG
Just happened to me... the nipple on the sensor is so fragile and snaps easily with the still tubing that MB uses. Just had to order a new one. Super glued for the time being.
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Old May 20, 2011 | 12:10 AM
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03 S600 11.7 @120, CL600
I have broken the map sensor nipple on both of my cars. You can find a new one on ebay for $55.
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Old May 21, 2011 | 08:15 PM
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From: Little silver, nj
CL65 AMG, RS6
Hi, got car back from dealer yesterday, had ICM replaced. Took engine cover off, saw a 4" rubber hose off passenger side IC hanging, where on air box does it get attached?
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Old May 22, 2011 | 02:48 PM
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From: Little silver, nj
CL65 AMG, RS6
Nevermind, attaches to sensor attached to an arm that is crewed into one side of ICM
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