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2008 E350 4M, 1988 300TE
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5,432 Posts
Discussion Starter #1
so my 2008 E350 is grumbling and whining when turning the wheel when ambient temps are below 55F.

I changed the fluid at 110k have 147k now.

I’ve checked the PS fluid level and it’s full, no leaks, no bubbling or fluid movement with the cap off engine running.

when the engines warm it’s not as loud but still slightly audible.

is it time for a new PS pump or is it worth doing another fluid flush?
 

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2008 E350 110k, 2000 E320 143k, 1983 380SEC 240k
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920 Posts
What fluid did you use? My experience is that generic fluids have too high viscosity at low temperatures, leading to the symptoms you describe.
 

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2008 E350 4M, 1988 300TE
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Discussion Starter #4
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