S-Class (W221) 2007-2013: S 320 CDI, S 350, S 450, S 500, S 550, S 420 CDI, S 600

Where to find Texaco 9109 PSF

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Old Nov 17, 2020 | 11:10 PM
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S-65 AMG
Where to find Texaco 9109 PSF

Sometime between 2007 and 2010 the recommended power steering fluid for US cars changed from Pentosin CHF11S to Texaco Chevron 9109 PSF. I can't find that anywhere though. The dealer says they only carry the older Pentosin-spec fluid.

Does anyone else know where to find this stuff?

Last edited by auburn2; Nov 17, 2020 at 11:16 PM.
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Old Nov 18, 2020 | 12:42 AM
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2012 S350 Bluetec 4MATIC; 2011 ML350; 2005 C230k;
Check the WIS for specs you have to use on your car.
On most cars it is 345.0
https://bevo.mercedes-benz.com/bevolisten/345.0_en.html

Also check post #11 on this thread what MB USA said about power steering fluids:
https://mbworld.org/forums/c-class-w...ml#post5409661

Last edited by artim808; Nov 18, 2020 at 12:47 AM.
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Old Nov 18, 2020 | 12:05 PM
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Originally Posted by artim808
Check the WIS for specs you have to use on your car.
On most cars it is 345.0
https://bevo.mercedes-benz.com/bevolisten/345.0_en.html

Also check post #11 on this thread what MB USA said about power steering fluids:
https://mbworld.org/forums/c-class-w...ml#post5409661
I checked WIS and it is 345.0 which is Pentosin.

Doesn't make a lot of sense that there are two different fluids with different specs, but I will go with it.
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