Mercedes-Benz GL63 AMG

Mercedes-Benz GL63 AMG

Why doesn't Mercedes-Benz make an AMG  It's a question many enthusiasts with growing families have undoubtedly asked. The outgoing first-gen GL had plenty in common with its ML platform-mate, but the SUVs didn't share the ML63's AMG badge and all the go-fast goodies that came with it. That changes with the second-generation GL-Class SUV, which adds the 2013 Mercedes-Benz GL63 AMG to the lineup.

As expected, the 2013 GL63 is propelled by the same hand-built, direct-injection, twin-turbo, 5.5-liter V-8 powering the ML63 AMG. For the GL63, AMG tuned the M157 engine to produce 550 hp and 560 lb-ft of torque, the same output as an ML63 equipped with the optional performance package (the ML63 puts out 518 hp and 516 lb-ft sans the package).

AMG's decision to make the higher power rating standard is a smart move, considering the GL63 is expected to tip the scales at more than 5500 pounds. Still, Mercedes claims it will run from 0-60 mph in just 4.9 seconds. (Top speed is electronically limited to 155 mph.) Not only will it be the fastest seven-seat SUV on the market, but it should also hold its own during the occasional stoplight drag race against sports cars such as Benz's own SLK350 and C350 coupe, which need 5.1 and 5.5 seconds to reach 60 mph, respectively.

Controlling all that power is AMG's seven-speed automatic and Benz's 4Matic all-wheel-drive system with 60 percent of the power driving the rear axle. The transmission includes a Controlled Efficiency mode (C) that activates ECO start/stop and pulls away from a stop in second gear. A sport (S) and manual (M) setting round off the gearbox's three modes.

The GL63 likely won't break any track records, but AMG has thrown in an advanced arsenal of suspension tech to make this three-ton SUV as athletic as possible. First up is the AMG Ride Control system, which combines Benz's Airmatic air suspension with special struts, an automatic self-leveling function, and Adaptive Damping System (ADS). Next is the Active Curve System, comprised of active front and rear anti-roll bars. The suspension setup includes Comfort and Sport modes, though drivers will likely favor the former in most driving situations to help smooth out the ride from the massive 21-inch AMG wheels. The suspension modes also adjust the characteristics of the speed-sensitive, electromechanical steering system. Rounding off the mechanical bits are big, ventilated and perforated disc brakes that are 15.4 inches up front and 13.6 inches in back.

Like most AMG models, the GL63 sports a number of visual upgrades. Massive air dams dominate the front fascia, while the bottom of the lower bumper is accented by a thick chrome bar. Horizontal bars of LED daytime running lamps sit atop the side air vents and the grille sports a simple, two-bar design. The side view includes the aforementioned 21-inch, five-spoke rims, flared fender flares, metallic side steps, and "V8 Biturbo" badges. Out back, the GL63 showcases AMG's signature quad tailpipes, blacked-out diffuser-like panels, and chrome accents.

Inside, the GL63 provides all the luxury you'd expect with a few sporty touches. The front seats are wrapped in perforated leather with contrast stitching, and offer added support for the side bolsters. AMG also made generous use of MB-Tex materials for the dashboard and door panels, while the roofliner is covered in suede-like material. The flat-bottomed AMG steering wheel with paddle shifters is wrapped in Dinamica microfiber. Metallic accents cover the air vents, center stack, gas and brake pedals, gauges, and door handles.

The GL63 will come with a long list of creature comforts including three-zone automatic climate control, Keyless-Go, memory front seats, and a power tailgate. A panoramic roof and a premium Bang & Olufsen BeoSound audio system are available.

Equally as important as the GL63's speed is its safety tech. Standard features include crosswind stabilization; Active Parking Assist; Attention Assist; and Collision Prevention Assist, a radar-based system that alerts drivers to avoid impending rear-end collisions. Optional features include a 360-degree camera to aid in parking situations, Active Lane Keeping Assist, Active Blind Spot Assist, BAS Plus brake assist, and Distronic Plus.

It's been a long time coming, but the GL63 AMG is set to arrive in the first quarter of 2013. The 2013 GL350 diesel, GL450, and GL550 variants roll into showrooms by September of this year. Though it's definitely not for everyone, AMG fanatics should find the GL63 AMG a suitable alternative for family outings while the C63 AMG Black Series or SLS AMG gullwing waits in the garage for track days.