randy993

Hello all,
My ps reservoir is leaking and it looks like I need to replace the o ring on my 2007 ML 350. I'm running into different pn for the o rings. Any help would be appreciated.
TIA,
Randy

Maj. Dundee

Is it a 350 gas?

randy993

yes it,s gas

Maj. Dundee

Here are the instructions for R&I of the Reservoir. If there is presently groaning while turning the wheel, the reservoir must also be replaced.

Regardless of what you replace, this bleeding procedure must be followed.

randy993

Thanks. I found several diagrams, but none showed the o ring. Thanks again.

anavabi

On putting the E clip (160 on the diagram) back, I did it on my ML500 long ago, I forget how I did it, but I'm finding it hard to do the same on my ML350. It's hard to push with my fingers. I used a pry bar and pushed against the ABS protector steel plate for leverage, but the clip wouldn't budge.
Just wondering if someone has a better trick to push this nasty clip back home.
Thanks

Maj. Dundee

Lubricate the inside and outside of the O-ring with P/S fluid or Vaseline and guide the reservoir into the pump as far as you can. Then leverage the the remainder until you are able to insert the E clip.

anavabi

The clip is the problem. It needs a lot of force in a confined space. Not sure how MB techs do this.

Maj. Dundee

The manufacturer assembles the reservoir and pump together. Then the M/B assembly plant installs it as one piece.

anavabi

I meant in the repair shop

Maj. Dundee

Just follow the instructions.

TBev

there’s a video on YouTube where the man uses a deep socket to rest on top of the clip, then uses a Prybar for leverage to seat the clip

https://youtu.be/EUJ9V0zIvqI?si=qpflSrHpHwr4XgmD