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  1. E39 M5 and E52 Z8 Discussion
    I bought a 2000 BMW M5 (E39) about 2 months ago with 105,XXX on it. I love the car but have not been able to figure out what this knob on the right side of the steering column just below the Ignition does. It is a round red knob with a metal pin sticking 1/4 inch out of it. You can turn the knob...