Just traded in a Audi Q7 on 01/16/09 after a HORRIBLE experience and picked up the GLK, same day. Looking to downsize, we felt the GLK was a solid choice. Overall, like the look but downsizing, I will have to get used to a small interior. Cargo area is very small. Rear seats are tight for adults. The structure feels VERY solid. 4matic is good in snow but seems to bind up in tight turns on dry roads. So far 2216 miles and its returning 13.1MPG city and 18.7 highway. In other words very thirsty. COMMAND sys is NOT user friendly. Rear view camera is great, ditto for sound sys. Last week though, it was repaired due to a faulty brake system and front rotors were replaced along with hard drive.
Solid body. Good brakes (when working). Acceleration is very good. Smooth engine and trans. Sharp looking. 20 inch wheels.
Low rent interior. Why is vinyl standard on a $50k SUV and not leather? Gets very pricey for a small SUV. Reliability issues too soon, too often. Needs better quality components (ie braking system, hard drive, COMAND interface etc.) Its thirsty on gas so be prepared. 20 inch wheels make ride rough.