2010 Mercedes Benz GL-Class Performance
This performance review was created when the car was new. Some links may no longer point to an active page.
The 2010 Mercedes Benz GL gets positive performance reviewers. Reviewers like the way the large SUV drivers like a much smaller vehicle, while still maintaining good off-road abilities. This is in large part thanks to its unibody construction, instead of the body-on-frame construction that is typically used in most large SUVs and trucks. Ride comfort, that befits a luxury SUV, also puts the Mercedes-Benz GL-Class ahead of some competitors, thanks to standard all-wheel drive, an independent rear suspension, and features such as electronic stability control.
- The GL "never feels like a full-size brute that can swallow seven; rather, it drives small, coming across more as an S-Class sedan than an Escalade competitor." -- Motor Trend
- "The Mercedes-Benz GL 450 is large and capable off road yet feels surprisingly car-like on the road." -- New Car Test Drive
- The GL "manages to present itself with a touch of class. Its mechanical sophistication, unit-body construction and superior craftsmanship also set it apart from other seven-passenger full-sizers" -- Edmunds
- "An impressive combination of power, smoothness, surefooted handling and luxury." -- AutoWeek
Acceleration and Power
The 2010 Mercedes-Benz GL-Class has three available engines. The base GL450 is powered by a 4.6-liter, 335-horsepower V8. The GL320 CDI is powered by a 3.0-liter turbodiesel V6 engine that makes 215 horsepower. The GL550 gets a powerful 5.5-liter V8 that makes 382 horsepower and 391 pound-feet of torque. A seven-speed automatic transmission provides very smooth acceleration in all models, according to most reviewers.
According to the Environmental Protection Agency, the GL550 is expected to net 13 miles per gallon in the city and 17 mpg on the highway. The GL450 trim provides 13/18 city/highway. But buyers hoping to lessen any guilt over buying such a vehicle might consider opting for the diesel-powered GL320 CDI, which provides much better mileage -- 18/24 mpg city/highway.
- "[Though] the diesel GL320 CDI isn't going to break any acceleration records, passing and merging maneuvers come easily" -- AutoWeek
- "Bigger V-8 adds hustle; diesel adds great gas mileage." -- Car and Driver
- "The BlueTEC diesel can feel slightly lethargic off the line, and some testers want quicker highway passing response, but its turbodiesel V-6 never feels underpowered. All engines benefit from a smooth, alert automatic transmission." -- Consumer Guide
- "The seven-speed automatic transmission shifts sublimely under all circumstances, kicking down into the thick of the power with just a moment's hesitation." -- Autobytel
Handling and Braking
Most reviews say that the Mercedes GL Class offers above-average handling, but lacks road feel. The GL450 uses an independent rear suspension system for both the front and rear wheels as well as a four-wheel air suspension system which automatically adjusts for road conditions, and which can also manually raise or lower the car's chassis for those venturing off-road. Reviews say this suspension system does a very good job at providing a comfortable ride. Braking is provided by vented disc brakes, which are supplemented by a four-wheel traction system, which monitors the speed of all wheels for slip, and applies brakes individually as needed.
- "Steering is accurate and direct. The GL550, however, tends to tramline along channels in the road and can skitter sideways in bumpy corners, compromising the sure-footed security of the other GLs. In fast turns on smooth surfaces, the GL550 has tenacious grip and relatively little body lean, but all GLs stay flatter in corners than most large SUVs. One test GL450 had a mushy brake-pedal feel." -- Consumer Guide
- All GL models "drive smaller than they are; agile handlers, they hustle quickly through curves." -- AutoWeek
- "In terms of handling, Mercedes' GL is made for luxury, not for sport, and it shows. For example, the GL's steering is nicely weighted, but it's a tad slow, and the soft suspension might feel too floaty for some drivers. Relative to other full-size SUVs, though, the . . . GL is reasonably agile and maneuverable." -- Edmunds
- "Ride quality is way above average," -- Motor Week
- "Feels smaller than it is, with controlled body motions and smooth ride." -- Car and Driver