The kickdown on my 1972 350sL is not working. (I imagine other model early benzes would have a similar design)

Checked wiring diagram and there is not much to it - just a foot switch that operates a solenoid valve on transmission.

Power comes from a fuse that I think is OK (but will recheck). Cable is connected at transmission end.

If fuse is good, either solenoid or switch must be bad or a wire must be disconnected.

Anyone know where I can check continuity? (Diagram shows a terminal strip but I don't know where it is.)

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Graham
85 300D,72 350SL, 98 E320, Outback 2.5