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Should BMW Make a Lightweight XM CS?

VIDEO: Is the BMW XM Quick On the German Autobahn?

VIDEO: Is the BMW XM Quick On the German Autobahn?

When the BMW XM first debuted, it was the most powerful production BMW in history. It’s since been beaten, only by another XM variant—the Label Red—but it’s still an immensely powerful machine. With a 4.4-liter…