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The only way to test the switch is to take it out, I thought?
After some very light research, it appears that BMW uses a magnetic switch on these cars. They're detecting initial clutch pedal movement (to disengage cruise control) and full clutch depression (to enable the start circuit) all with the same switch.
It has 4 wires/4 prongs however, I have not been able to find any info on which colored wire/numbered prong does what..
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