GL Class (X164) 2007-2012: GL320CDI, GL420CDI, GL450, GL550

Air line that goes to the compressor for the suspension

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Old 04-15-2024, 06:33 PM
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Air line that goes to the compressor for the suspension

Hello,

I need the part # to the air line that goes to the air compressor for the air matic. The line cracked and it can’t be repaired or shortened as the previous owner did that already.
Old 04-15-2024, 06:36 PM
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Dude it's a rubber hose.

Get fiber reinforced (heater hose or fuel line) if you're extra paranoid.
Old 04-15-2024, 09:06 PM
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not the rubber hose.. the plastic one that goes into the threaded nut



Originally Posted by eric_in_sd
Dude it's a rubber hose.

Get fiber reinforced (heater hose or fuel line) if you're extra paranoid.

Last edited by clb0099; 04-15-2024 at 09:21 PM.
Old 04-16-2024, 12:23 AM
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Originally Posted by clb0099
not the rubber hose.. the plastic one that goes into the threaded nut
Oh funny, people have to trim the rubber hose sometimes. You're talking about the plastic hose that goes out of the air compressor, from the compressor to the valve block. Can't imagine why anyone would have ever trimmed it in the first place. They should just leave them alone.

All I can suggest is it's a poly (polyethylene) plastic tube, but unfortunately it's probably a metric size, so your hardware store won't help you. No idea about the part number, sorry. If you can find metric poly tubing, any old maker would do. Most are rated to a few hundred psi, especially in the smaller diameters.
Old 04-16-2024, 09:54 AM
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2010 ML550 VIN WDC1641722A564750, 2010 B180
Originally Posted by clb0099

not the rubber hose.. the plastic one that goes into the threaded nut
One solution is to take the hose you have to a industrial hydraulic repair/supplies outlet that fix industrial machinery. This is what I did as when I broke an air line replacing the front airbags, MB told me I'd have to wait 3 weeks for the part to come from Singapore. They hydraulic repair shop matched the hose for pressure and diameter (internal as well as external diameter) and also gave me connectors to transplant in whatever I needed. They keep a lot of stock on hand. Its been 4 years and never had a problem.

It was as cheap as chips so I bought enough tubing to replace the whole car's air lines. I think it cost like $20 for the tube, plus the fittings. These places are stocked with everything because they cater to so much industrial equioment so matching the hose was child's play. Not sure what you call them in the US, but in Australia if you go to https://www.pirtek.com.au/ you'll see the outfit I'm talking about and am sure you can match it up with someone there. Best of luck
Old 04-16-2024, 10:19 AM
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Originally Posted by BlackML550
One solution is to take the hose you have to a industrial hydraulic repair/supplies outlet that fix industrial machinery. This is what I did as when I broke an air line replacing the front airbags, MB told me I'd have to wait 3 weeks for the part to come from Singapore. They hydraulic repair shop matched the hose for pressure and diameter (internal as well as external diameter) and also gave me connectors to transplant in whatever I needed. They keep a lot of stock on hand. Its been 4 years and never had a problem.

It was as cheap as chips so I bought enough tubing to replace the whole car's air lines. I think it cost like $20 for the tube, plus the fittings. These places are stocked with everything because they cater to so much industrial equioment so matching the hose was child's play. Not sure what you call them in the US, but in Australia if you go to https://www.pirtek.com.au/ you'll see the outfit I'm talking about and am sure you can match it up with someone there. Best of luck
Fantasttic.

From the picture OP posted, it looks like there is a special fitting on the end. I haven't seen that before; where does it go?

At the risk of stating the obvious, for anyone else reading, note that the tube from the compressor to the valve block is larger diameter than the rest of the tubes.
Old 04-16-2024, 12:16 PM
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Originally Posted by eric_in_sd
Fantasttic.

From the picture OP posted, it looks like there is a special fitting on the end. I haven't seen that before; where does it go?

At the risk of stating the obvious, for anyone else reading, note that the tube from the compressor to the valve block is larger diameter than the rest of the tubes.
I remember this short piece of tube. It's S shaped. I bought one from ebay and ended up not needing it (re-used the old one when replacing the pump and manifold). Its part number is:
A164 327 0145
Old 04-16-2024, 08:49 PM
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Old 04-17-2024, 11:09 AM
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Originally Posted by eric_in_sd
Fantasttic.

From the picture OP posted, it looks like there is a special fitting on the end. I haven't seen that before; where does it go?

At the risk of stating the obvious, for anyone else reading, note that the tube from the compressor to the valve block is larger diameter than the rest of the tubes.
yes the tube from the compressor to the valve block has a larger diameter as shown in attached valve block photo (lower right receptor)


Old 04-17-2024, 01:14 PM
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It's actually C shaped, as shown attached. The two ends are protected with sleeves that need to be removed when installing into the push-in connector.

Old 04-17-2024, 03:40 PM
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Oh, awesome, thanks for the clarification.

Really, it's just fairly ordinary poly tubing, except it maybe has thicker walls and is metric sized. But given that one can get the factory part delivered for $50, I question the merits of jerry-rigging a replacement.

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