RESCOTT, ARIZONA, WAS A GOLD RUSH town. It’s here in the modern-day Old West, outside the oldest bar in Arizona, the Palace Saloon on Whiskey Row, that we climb into the first plug-in hybrid M-car for the first time. It’s far from a saloon itself: today the gold is in them there SUVs (and liberally applied to the XM’s exterior if buyers spec the optional gold-coloured trim). This is especially true in the USA, which is expected to be one of the XM’s most important markets, along with China, the Middle East and South
