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

X614 GL 320 - Power Steering leak

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Old Feb 27, 2025 | 01:45 PM
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GL320 ML 350
X614 GL 320 - Power Steering leak

Got a leak on the power steering reservoir, can tell if its coming from the hose or underneath,
Anyone had this before and have any advice, what normally is the cause for the leak, metal clip, hose, seal underneath?

Hamazz

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Old Feb 27, 2025 | 02:47 PM
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NGL450 w/EORP, S550
Please search this forum for the $3.50 O-ring that hardens and causes this leak.

It’s been well covered, and repair methods described.

EdIt: OM642 is different.

Last edited by Max Blast; Feb 27, 2025 at 05:45 PM.
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Old Feb 27, 2025 | 02:58 PM
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Thanks,
I did have a look at some of them, i know other models have the O-ring and c clip that needs replacing and securing in place
There does not seem to be an O-ring for the reservoir, as both connectors as to hoses with clamps, see below image of the unit and the power steering schematic



Hamazz
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Old Feb 27, 2025 | 05:43 PM
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NGL450 w/EORP, S550
Aha, you’re a diesel.

Yeah, I have no idea man just have to trace the leak.

Last edited by Max Blast; Feb 27, 2025 at 05:44 PM.
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Old Mar 2, 2025 | 03:55 AM
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GL320 X164 OM642 722.902
Originally Posted by hamazz
Thanks,
I did have a look at some of them, i know other models have the O-ring and c clip that needs replacing and securing in place
There does not seem to be an O-ring for the reservoir, as both connectors as to hoses with clamps, see below image of the unit and the power steering schematic



Hamazz
could be plenty of things mate. I would start with taking out that crimp-style clamp and replacing with an adjustable hose clamp.

Quite unrelated, but I had a same issue with a crimp-style ear clamp on my coolant pipes. It was leaking since the coolant pipes became soft and changed shape. I toom it off and replaced with regular hose clamps. Solved the leak.
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Old Mar 5, 2025 | 01:40 PM
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Will give that a try, i wasnt sure if it was the hose or the clip, your comment makes alot of sense, the pipes have probably softened after all those years and the hose clamps will probably make a better seal.

Hamazz
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Old Mar 9, 2025 | 08:54 AM
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GL320 X164 OM642 722.902
Originally Posted by hamazz
Will give that a try, i wasnt sure if it was the hose or the clip, your comment makes alot of sense, the pipes have probably softened after all those years and the hose clamps will probably make a better seal.

Hamazz
A few examples on my GL where I took off the ear clamps and replaced with adjustable hose clamps. This includes the power steering reservoir.

Fuel filter clamps
Fuel filter clamps
Steering reservoir clamps
Steering reservoir clamps
Coolant pipe clamps
Coolant pipe clamps
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