S-Class (W220) 1999-2006: S 320 CDI, S 320, S430, S 500, S 600

Pentosin CHF11S (ABC Fluid) in the Braking System?!

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Old 04-20-2017, 06:09 PM
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2005 S500 Designo
Pentosin CHF11S (ABC Fluid) in the Braking System?!

Just replaced the harmonic balancer on the car,
and just randomly I checked the brake fluid. IT WAS GREEN!

I think someone flushed the brakes with CHF11S

It must have been like that for over 2 years!
Needless to say I replaced it with the proper DOT 4 fluid, but WTF.
The fluid itself looked fine, really clear except green.

My only other guess is that regular brake fluid turned green?
Anyone ever heard of anything like this?!
Old 04-20-2017, 07:04 PM
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There is a factory brake fluid that's blue, that's probably what you have in there. The CHF11S has a VERY distinct smell, you shouldn't be able to confuse it with brake fluid.

If you mix regular fluid with the blue it turns green.
Old 04-20-2017, 09:39 PM
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Joe is right. Apart from that, I got nothing to add except that I love fried chicken also.
Old 04-21-2017, 09:36 AM
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For whatever weird reason the feds had, the US federal vehicle standards now prohibit colored brake fluid. That means that the green fluid is not legal US brake fluid.

It used to be common for racers to use ATE blue and ATE yellow fluid in alternating changes. This let you know when the change is completed. Can't do that any more, unless you smuggle in the ATE blue fluid, because you can't legally buy colored brake fluid here.
Old 04-23-2017, 09:43 PM
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Originally Posted by ItalianJoe1
There is a factory brake fluid that's blue, that's probably what you have in there. The CHF11S has a VERY distinct smell, you shouldn't be able to confuse it with brake fluid.

If you mix regular fluid with the blue it turns green.
I think this is it.

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