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BMW's iDrive

4 -- iDrive Even among the trio of similar dashboard interfaces from Audi and Mercedes-Benz, BMW's iDrive is utter knobsense. Directional inputs send you to various submenus, but in most models there are no shortcut or previous-screen buttons around the knob. If you get the hang of it, you'll be ready for "Survivor" tryouts. BMW
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