"This is actually my mother's car (I drive a brand that begins with a P), but I've driven it frequently enough to form an impression. Reliability seems to have been a non-issue over 2 years, although a front suspension/shock groan has surfaced recently.
The Mercedes-Benz hallmarks are all here. Cabin is impressively stiff and isolated for the price. Doors shut with a sound that whispers money. 80 mph feels like 50. And so on. Car has the Premium Package w/ Nav, getting typical toys like power tailgate and rear camera. Synthetic seats are a tad rubbery, but TOUGH as nails and do not appear to wear at all. Wood trim and silver accents are old-world-elegant, and the interior is generally angular and conservative. These are what keep my mother going back to the brand. Very Benzo.
Unfortunately, that's where the positives end. It doesn't seem to be any more frugal than the ML350 that it replaced, struggling to reach 23 mpg highway despite weighing 800 lbs less than the ML. Throttle response of a fishing boat. The rudder...it's a rudder. Suspension is very soft and not even well-damped. The car begs for straight lines. Don't think about off-roading with those delicate 19" wheels, which are pretty but a nightmare to clean. Overall, best experienced from the [front] passenger seat. Back seat is tight."
"Worth the wait for the 2013 model changes. Interior is far superior to prior year models. Luxurious, quite and smooth ride even with the 20" wheels. Acceleration in economy mode will start in 2nd gear for fuel savings. Under normal driving conditions, it performs superbly. If I need additional acceleration, I switch to sport mode and the GLK starts in 1st gear adding more torque and quicker acceleration. In ECO mode, the engine will shut off during stops and restart when the brake is released with no interference in acceleration and is almost unrecognizable. If AC is adjusting temperature in Auto mode, providing AC comfort takes priority over engine shut down at stops. All electrical functions are normal. Keyless is great. The only way you can lock keys in car is by using the lock function on the automatic tail gate...dealer said you could never lock keys in car until he did with the tailgate. MBrace unlocked the car. Drove an Audi for 6 years and loved it until I got to 100,000 miles then the car began to break down. Drove the Q5. Sporty, but noisy 2.0 and 3.2 had nothing to offer. Don't believe the man behind the curtain in Consumer Reports. Compare the cars yourself. MB GLK is fabulous. New Pebble Gray with cream and brown interior with pleny of dash wood. Seating in the rear is just as adequate as Audi. Dual sunroofs are filtered for less heat. Less expensive Becker Nav is great. Knob manipulation less complicated than Audi or Lexus. Used USAA Car Buying program and got a great deal. You will enjoy the new GLK!"