Mercedes GLK

Small turbocharged engines are gaining popularity in other Mercedes-Benz cars and SUVs for their increased fuel economy, and it’s possible you’ll see a turbocharged offering in the GLK’s successor. If that’s the case, I’ll miss the current GLK’s standard powertrain: a naturally aspirated 302-horsepower, 3.5-liter V-6. Sure, fuel economy could be improved from the all-wheel-drive’s 18/25/21 mpg city/highway/combined figures, but it’s hard to replicate in a turbocharged one the punchiness of a good naturally aspirated engine. The GLK’s V-6 offers a potent punch of acceleration, with instantaneous accelerator response and a healthy V-6 growl under the hood. A BlueTEC diesel-powered GLK250 is rated 24/33/28 mpg with standard all-wheel drive and is one of a few diesel-powered SUVs in the segment.