Certified Benz & Beemer Compares 2010 Porsche CAYENNE VS 2010 Mercedes GLK-Class Near Phoenix, AZ

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2010 Porsche CAYENNE

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VS

2010 Mercedes GLK-Class

Safety Comparison

To provide maximum traction and stability on all roads, All Wheel Drive is standard on the Cayenne. But it costs extra on the GLK.

When descending a steep, off-road slope, the Cayenne’s standard Porsche Hill Control allows you to creep down safely. The GLK doesn’t offer Porsche Hill Control.

The Cayenne offers optional parking sensors to help warn the driver about vehicles, pedestrians or other obstacles behind or in front of their vehicle. The GLK doesn’t offer a front parking aid.

Both the Cayenne and the GLK have standard driver and passenger frontal airbags, front side-impact airbags, head airbags, front and rear seatbelt pretensioners, height adjustable front shoulder belts, plastic fuel tanks, four wheel antilock brakes, traction control and electronic stability systems to prevent skidding.

The Porsche Cayenne weighs 528 to 1379 pounds more than the Mercedes GLK. The NHTSA advises that heavier vehicles are much safer in collisions than their significantly lighter counterparts.

Warranty Comparison

The Cayenne’s corrosion warranty is 6 years and unlimited miles longer than the GLK’s (10/unlimited vs. 4/50,000).

Reliability Comparison

J.D. Power and Associates’ 2009 Initial Quality Study of new car owners surveyed provide the statistics that show that Porsche vehicles are better in initial quality than Mercedes vehicles. J.D. Power ranks Porsche second in initial quality. With 11 more problems per 100 vehicles, Mercedes is ranked 6th.

J.D. Power and Associates’ surveys of the owners of three-year-old cars provide the long-term dependability statistics that show that Porsche vehicles are more reliable than Mercedes vehicles. J.D. Power ranks Porsche 9th in reliability, above the industry average. With 34 more problems per 100 vehicles, Mercedes is ranked 17th.

Engine Comparison

The Cayenne’s standard 3.6 DOHC V6 produces 22 more horsepower (290 vs. 268) and 15 lbs.-ft. more torque (273 vs. 258) than the GLK’s 3.5 DOHC V6. The Cayenne S’ standard 4.8 DOHC V8 produces 117 more horsepower (385 vs. 268) and 111 lbs.-ft. more torque (369 vs. 258) than the GLK’s 3.5 DOHC V6. The Cayenne GTS/Transsyberia’s standard 4.8 DOHC V8 produces 137 more horsepower (405 vs. 268) and 111 lbs.-ft. more torque (369 vs. 258) than the GLK’s 3.5 DOHC V6. The Cayenne Turbo’s standard 4.8 turbo V8 produces 232 more horsepower (500 vs. 268) and 258 lbs.-ft. more torque (516 vs. 258) than the GLK’s 3.5 DOHC V6. The Cayenne Turbo S’ standard 4.8 turbo V8 produces 282 more horsepower (550 vs. 268) and 295 lbs.-ft. more torque (553 vs. 258) than the GLK’s 3.5 DOHC V6.

Fuel Economy and Range Comparison

The Cayenne has 9 gallons more fuel capacity than the GLK (26.4 vs. 17.4 gallons), for longer range between fill-ups.

Brakes and Stopping Comparison

For better stopping power the Cayenne Turbo’s front brake rotors are larger than those on the GLK:

Cayenne Turbo

GLK

Front Rotors

16.1 inches

13 inches

Rear Rotors

14.6 inches

14.2 inches

The Cayenne offers optional heat-treated ceramic brake rotors, which last ten to twenty times as long as conventional cast iron rotors, don’t rust, don’t fade during repeated high speed braking, and their lighter weight contribute to better braking, handling and acceleration. The GLK doesn’t offer ceramic brake rotors.

The Cayenne stops much shorter than the GLK:

Cayenne

GLK

70 to 0 MPH

158 feet

180 feet

Car and Driver

60 to 0 MPH

111 feet

132 feet

Motor Trend

Tires and Wheels Comparison

For better traction, the Cayenne’s optional tires are larger than the largest tires available on the GLK (295/35R21 vs. 235/50R19).

The Cayenne’s optional tires provide better handling because they have a lower 35 series profile (height to width ratio) that provides a stiffer sidewall than the GLK’s optional 45 series tires.

For better ride, handling and brake cooling the Cayenne offers optional 21 inch wheels. The GLK’s largest wheels are only 20 inches.

Suspension and Handling Comparison

The Cayenne has standard front and rear stabilizer bars, which help keep the Cayenne flat and controlled during cornering. The GLK’s suspension doesn’t offer stabilizer bars.

The Cayenne offers active sway bars, which help keep it flat and controlled during cornering, but disconnect at lower speeds to smooth the ride and offer greater off-road suspension articulation. This helps keep the tires glued to the road on-road and off. The GLK doesn’t offer an active sway bar system.

The Cayenne offers an optional driver-adjustable suspension system. It allows the driver to choose between an extra-supple ride, reducing fatigue on long trips, or a sport setting, which allows maximum control for tricky roads or off-road. The GLK’s suspension doesn’t offer adjustable shock absorbers.

The Cayenne offers an optional automatic front and rear load leveling suspension to keep ride height level with a heavy load or when towing. The Cayenne’s height leveling suspension allows the driver to raise ride height for better off-road clearance and then lower it again for easier entering and exiting and better on-road handling. The GLK doesn’t offer a load leveling suspension.

For a smoother ride and more stable handling, the Cayenne’s wheelbase is 3.9 inches longer than on the GLK (112.4 inches vs. 108.5 inches).

For better handling and stability, the average track (width between the wheels) on the Cayenne is 4.3 inches wider in the front and 4.8 inches wider in the rear than the track on the GLK.

The Cayenne Turbo S handles at .91 G’s, while the GLK350 4Matic pulls only .78 G’s of cornering force in a Car and Driver skidpad test.

The Cayenne executes Motor Trend’s “Figure Eight” maneuver quicker than the GLK350 4Matic (27.6 seconds @ .6 average G’s vs. 28.2 seconds @ .59 average G’s).

For greater off-road capability the Cayenne has a greater minimum ground clearance than the GLK (8.6 vs. 7.9 inches), allowing the Cayenne to travel over rougher terrain without being stopped or damaged. The Cayenne’s minimum ground clearance is 2.8 inches higher than on the GLK (10.7 vs. 7.9 inches).

Passenger Space Comparison

The Cayenne has 3.1 cubic feet more passenger volume than the GLK (106 vs. 102.9).

The Cayenne has 7.2 inches more front hip room, 3.3 inches more front shoulder room, .9 inches more rear legroom, 6 inches more rear hip room and 1.3 inches more rear shoulder room than the GLK.

The front step up height for the Cayenne is 2 inches lower than the GLK (17” vs. 19”). The Cayenne’s rear step up height is 2 inches lower than the GLK’s (17” vs. 19”).

Cargo Capacity Comparison

The Cayenne has a larger cargo area with its rear seat folded than the GLK with its rear seat folded (62.5 vs. 54.7 cubic feet).

The Cayenne’s cargo area is larger than the GLK’s in almost every dimension:

Cayenne

GLK

Length to seat (2nd/1st)

38.25”/65.5”

35”/65.9”

Max Width

45.75”

48”

Min Width

45.75”

37.4”

Height

36.5”

33”

The Cayenne’s rear cargo window opens separately from the rest of the liftgate door to allow quicker loading of small packages. The GLK’s rear cargo window doesn’t open.

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