The GLA compact luxury crossover is Mercedes' entry-level SUV. It's based on the same components as the CLA sedan. The basic GLA 250 comes with all-wheel drive and a turbocharged, 2.0-litre four-cylinder engine that develops 208 horsepower. If you're looking for a little more sportiness, there's also the 375-horsepower GLA 45 AMG. The only available gearbox is a twin-clutch automatic.