There's no question who builds this vehicle. The X5 is immediately recognizable as a BMW. It looks like a 5 Series wagon on steroids, and is remarkably close in overall size. From the kidney-shaped grille to the tailgates, the curvy X5 is all BMW. The slope of the tailgate looks almost identical to that of the 5 Series wagon. The major difference is that the X5 is 10 inches taller than the 5 Series wagon. This increased ride height is the key element of making this vehicle more like a sport-utility. Big-diameter wheels with low-profile tires that lend an aggressive appearance.BMW's X5 is called a light-duty truck by the government. Most truck-based SUVs, including the Mercedes-Benz M-Class, are built with the body bolted onto a frame. The X5, however, uses a monocoque body shell like that of a regular sedan. This unit-body construction provides a much stiffer body shell, which improves handling, reduces noise and allows better fit and finish. The X5 is not the first monocoque SUV; the Lexus RX 300 and the Jeep Grand Cherokee follow the same design concept. And the 2003 Range Rover, which BMW helped develop, uses this same type of monocoque construction. Because of the unit-body construction they share, the Lexus RX 300 is the X5's closest competitor in terms of ride comfort and handling.
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