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

Air compressor leaks

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Old 02-22-2018, 05:45 PM
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R350
Air compressor leaks

I can hear air leaking from the back drivers side and sometimes it stays level and doesn't loose air. Also my compressor will kick on and off frequently while the car is running. it stays level while the car is on and only leans after car is off. TIA
Old 02-22-2018, 07:14 PM
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1999 E300TD
Great diagnostics,now fix the leak!!
Old 02-26-2018, 08:17 AM
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R320, Astro, JSW, ST4
^ X2... Unless OP wants to replace the compressor as well.
Old 07-11-2021, 11:50 PM
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2008 GL450
Originally Posted by B34chBum
^ X2... Unless OP wants to replace the compressor as well.
Personally, I prefer to only replace components that are confirmed broken, but that’s because sooner or later, everything will break, even new parts. Suspension is one area where sometimes it makes sense to replace in pairs.

my 08 GL had a fully collapsed suspension caused by a bad compressor. I replaced the distribution block with the compressor because they’re part of the same assembly.

in this case, I’d likely replace airbags in pairs or all corners without doing the compressor and disti block. As long as the compressor hasn’t been overworked by pumping that leaking corner, it should be okay. Too often, though, some people will let it progress until it burns the pump too.

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