Handling
With their similar turning circles, the GLK-Class and the Buick Enclave likely handle about the same into and out of tight spots.
Drivetrain
The GLK-Class's engine is somewhat smaller than the Enclave's, but not terribly so.
The Mercedes-Benz GLK-Class has no lessons to learn as far as torque from the Buick Enclave.
Torque is roughly equivalent to acceleration, and in this respect, the Buick Enclave isn't much more powerful than the GLK-Class.
Utility
Drivers with frequent kid-duty might favor the Buick Enclave over the Mercedes-Benz.
The GLK-Class outpulls the Buick Enclave by a big margin.
Convenience
You'll quite certainly have to take the Mercedes-Benz GLK-Class for a fill-up more often than the Enclave because of its tank size and gas mileage.
Comfort
While the front cabin in the Enclave offers a bit more head room than the Mercedes-Benz GLK-Class, there frankly isn't much of a difference.
While the rear of the Buick Enclave offers a bit more head- and leg-room than the Mercedes-Benz GLK-Class, there really isn't much of a difference.
Dimensions
Your wallet will hurt more every time you fill up the Buick than the GLK-Class because of its larger tank.
The Mercedes-Benz and the Buick Enclave compete for the same parking spaces.
The Mercedes-Benz GLK-Class's shorter wheelbase will likely give a sprier feel in daily traffic. On the flip side, the Enclave is likely to have a smoother, more stable ride.
Cost
The destination charge is a standard charge for transporting the vehicle from its point of origin to the dealer. It costs approximately the same to get the Buick Enclave to the dealership as the Mercedes-Benz GLK-Class.
The Buick Enclave won't save you much money at the pump compared to the Mercedes-Benz GLK-Class.
As far as MSRP, the Mercedes-Benz GLK-Class doesn't cost much less than the Enclave.
Warranty
The Mercedes-Benz GLK-Class and the Enclave have the same basic warranty.