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Expansion tank for power steering oil.

CHRISCHANCE

Active Member
Joined
Jun 12, 2013
Messages
121
Location
Great Oakley, Northamptonshire, England.
Car
ML55 AMG
I was losing fluid from the join at the bottom of the expansion tank on my ML55. I bought a replacement tank but it was only when I removed the old tank I saw a rubber O ring seal, which wasn't on the new one.

I called Kms who supplied it but they said the tank doesn't come with the O ring.

I had to use the old O ring, which I am not happy with and called Mercedes Northampton and the man there informed me that the ring is part of the actual pump - not the tank, though it does fit in the housing inside the tank.

He had one in stock and for just a couple of quid he's posting it tonight for me.

I've done a few miles since fitting the old seal and there's no leaking... yet. So the question still niggles me: Did I need a new tank or a new rubber seal?

For peace of mind, I will fit the new seal when it arrives.

While I was talking to him, I asked about a gasket and filter for a gearbox ATF change. The price he quoted was cheaper than I could find anywhere.

Just thought I'd tell you about that.
 

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