Review: 2023 Mercedes-Benz Sprinter AWD finds better footing

The steep, unpaved driveway was so loose and mud-slicked from recent rains that I could feel the ground sliding ever so slightly beneath the tires, even after we’d stopped. I was instructed by my guide in the passenger seat of a big 2023 Mercedes-Benz Sprinter AWD passenger van, at the mucky off-road park near Stuttgart, to reverse and back…