Question about 1988 Mercedes-Benz S-Class

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Adjust fuel mixture for 420 sel 126 Mercedes 1988

Hi there I am trying to find out which way to turn the adjustment srew inside the airfilter hole which regulates the mix. is it rich turn right so that would be clockwise or the other way. I have installed a hydrogen supplement system so I like to fine tune the runnnig now, I feel it is still a bit rich as I see on the exhaustpipe colour. Many thanks if someone could help. Peter klose@xtra.co.nz
Ps I hope this car has no sensors for it infection system which could make the use of my supplement system less or not workable. Any clues on this one as well

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Clockwise is leaner.

Posted on Oct 20, 2009

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