Originally Posted by Zulfiqar

Ill try to find the service bulletin explaining what oil to use in steering systems, i also was confused a while back as the steering oil in my w210 was amber.

The bulletin explained that all w210 are serviced with atf type oil and not chf type.

The febi oil sold in napa for a w210 is undyed atf dex ii oil.

I also have bought some aviation oil from recommendation of a member here and filled that in another vehicle (older w202). Works perfect.

If wanting to keep the same color and smell of the ps oil, lubegard synthetic psf is great too. Personally i used synthetic atf in my w210 power steering and it worked perfect till i owned it.

The bulletin number is TSB: P-B-46.00/44 46