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Originally Posted by Mike Murrell
So my original MB R-12 system only has a LOW pressure switch? That might make sense as all of my other R-12 cars only had a LOW pressure switch, but the description of the switch in the photo at the Fast Lane section here says 2bar low - 30 bar high.
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If you look at the wiring diagrams, you'll find that it is a hi/lo pressure switch originally. I don't know how far back they were used, but I see the switch in diagrams for 1988-91 300SE.
