Excellent description.

You seem to have the older (or at least different setup). My front vacuum switch doesn't have the fitting on top, just the two on the bottom.

So I am going to assume that I don't have the circuit from the front switch to the dashpot.

Does your car have the idle solenoid switches? Maybe they bagged the dashpot circuit, which would seem to support fuel shutoff, when they added solenoids?

Questions:

Are both the lines coming off the bottom of the front switch red?

What color are the lines coming off the rear switch?

Thanks again,

Chuck

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Chuck Taylor
Falls Church VA
'66 200, '66 230SL, '96 SL500. Sold: '81 380SL, '86 300E, '72 250C, '95 C220, 3 '84 280SL's '90 420SEL, '72 280SE, '73 280C, '78 280SE, '70 280SL, '77 450SL, '85 380SL, '87 560SL, '85 380SL, '72 350SL, '96 S500 Coupe