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  1. M135i/M140i/M235i/M240i
    In Comfort and in Drive and with Off/On disabled, my M240 usually idles fine at red lights, but occasionally I get rhythmic surging. The tach bounces from 700 to 1200 and back, and I have to keep my foot firmly on the brake because the car wants to go play. Any insights? MoneyPenny
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