R-Class (W251) Produced 2006-2013: R320CDI, R350, R420CDI, R500

Leak between air compressor and valve block

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Old 11-15-2020, 06:46 PM
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Mercedes GL 450 4.7
Leak between air compressor and valve block

Hi
After performing the airmatic tests with star diagnostic i got info of leaking between compressor and valve block.
it cause often activation of compressor.
The short line of air house doesn't shows any leak .I inserted a new conectors on both side and leak is still there.
Is anyone has a similar experience because my conclusion is to replace the valve block.
Struts and everything else hold the pressure just fine.
Can valve block leak itself?
Old 12-06-2020, 01:11 AM
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GLS63 AMG
Originally Posted by SKGL450
Hi
After performing the airmatic tests with star diagnostic i got info of leaking between compressor and valve block.
it cause often activation of compressor.
The short line of air house doesn't shows any leak .I inserted a new conectors on both side and leak is still there.
Is anyone has a similar experience because my conclusion is to replace the valve block.
Struts and everything else hold the pressure just fine.
Can valve block leak itself?
Hit it with some soapy solution in a spray bottle and check for bubbling
Old 12-06-2020, 10:06 AM
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Mercedes GL 450 4.7
Thank you
Yes I was able to locate the problem .
it was a small leak in the compressor conector. Thank you

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