If you had just bought an obscure, British sport sedan in New York and had to bring it back to Ann Arbor, you'd rely on something like our Mercedes-Benz GL450, as did copy editor Rusty Blackwell, now the proud owner of a 1979 Triumph Dolomite purchased from the vast scuderia of New York bureau chief Jamie Kitman.
Including errands and preparation for his drive, Blackwell completed 1453 miles in 26 hours and 40 minutes, eking out 15.5 mpg while averaging 54 mph. Although any and all "Lucas, Prince of Darkness" issues were limited to the Dolomite, hooking up a trailer did result in some electrical glitches.
"There's nothing in the owners' manual about how to do this," Blackwell observes. "It took Mercedes PR a couple of days to give us the information on the exact locations of the pertinent wiring harness." Our GL's towing package option includes pre-wiring for brakes. Blackwell was discouraged when he consulted etrailer.com for tips, where experts warned of hassles and dealer apathy. In the search to replace an incorrect wiring connector with the right one, a local Benz dealer he called late on a Thursday told him the pigtail wasn't in stock, but he could get one by Tuesday, two days after Blackwell had hoped to return with the Triumph.
Instead, Blackwell's co-driver for the excursion disassembled the trailer-brake controller's connector and plugged the four lead wires directly into the SUV's connector, insulating it all with electrical tape. On the drive east the next morning, they found that, as the owners' manual warned, the connected trailer had disabled the GL's blind-spot monitor, but the manual did not indicate that the yellow triangles in the sideview mirrors would be constantly illuminated. Even with the trailer, the Mercedes' lane-keeping assist vibrates the steering wheel when you cross a lane line without signaling.
After Blackwell picked up the Triumph, he could feel the extra weight of the car on the trailer, though the tow was "well within the GL450's abilities."
"I certainly wouldn't have wanted very much less horsepower in the mountains of Pennsylvania to maintain speeds of 70-75 mph on some of the steeper grades."
Blackwell says he's never used a paddleshifter so often, and he avoided the GL's seventh gear to protect its transmission. "Fifth and often fourth gears were manually selected to either keep the rig up to speed when ascending or, alternatively, to keep it from speeding up too quickly on downhill sections."
Overall, Blackwell felt that "the biggest Benz was very comfortable and not fatiguing or unwieldy to drive such a great distance with precious cargo in tow."
On the minus side, he yearned for a button to manually engage the camera while slowly moving the GL forward with the trailer and Dolomite attached. The driver's sideview-mirror camera stopped working briefly after he attached the trailer, and Blackwell didn't like the pickiness of the keyless entry system. It requires the key to be too close before it automatically unlocks the door, he says. The adaptive high-beams turn off too quickly on country roads, and the attention alert system, signified by a coffee cup symbol on the instrument panel, beeps too easily after long drives. All are observations one is likely to make only after such a long drive involving a trailer.
As for the rest of the Automobile Magazine staff, ride quality and handling are major areas of contention.
"There's a lot more body roll than I remember in a GL," senior web editor Phil Floraday says, "and it feels a whole lot smaller than a QX" while failing to match the Infiniti's 14 mpg city/20 mpg highway ratings.
"Like Phil, I observed more body roll and head toss than I remember from other GLs," associate editor David Zenlea agrees. "Some of that may be because the test cars I drove had active anti-roll bars. It probably helped that my initial drive was in New Mexico, where the roads are wider and far smoother than what we have in Ann Arbor."
The problem might be in Mercedes' attempt to make the GL feel more like a car. Associate web editor Donny Nordlicht, who laments the new GL's "anonymous" styling versus the old model, says "the soft suspension makes for a pillowy ride around town and on the highway, but throw in any curves and you'll induce car sickness in passengers."
Jennifer Misaros, managing editor for digital platforms, describes body motions as "shockingly bad; our Four Seasons Infiniti QX, despite feeling higher off the ground than the GL, was more controlled through corners."
The rest of the staff largely agree with Blackwell, though, and with associate web editor Jake Holmes, who says "everyday driving's a breeze" thanks to light steering, wide-eyed outward visibility, and 360-degree cameras. As deputy editor Joe DeMatio says, it "drives smaller than it looks."
At 10,527 miles, the next thing on the Mercedes GL450's agenda is its slightly overdue first service.
|Base price (with dest.)||$64,805|
|Price as tested||$78,290|
|Body Style||4-door crossover|
|Engine||32-valve DOHC twin-turbocharged V-8|
|Displacement||4.7 liters (285 cu in)|
|Power||362 hp @ 5000 rpm|
|Torque||406 lb-ft @ 1500 rpm|
|Fuel Economy||14/19/16 (city/hwy/combined)|
|Turns lock-to-lock||2.9 turns|
|Turning circle||40.7 ft|
|Suspension, Front||Control arms, coil springs|
|Suspension, Rear||Multilink, coil springs|
|Brakes F/R||Vented disc/disc|
|Wheels||19-inch aluminum alloy|
|Tires||Continental 4x4 Contact|
|Tire Size||275/45R-19 111H|
|Headroom F/M/R||41.2/40.0/38.9 in|
|Legroom F/M/R||40.3/38.5/35.0 in|
|Shoulder Room F/M/R||58.5/58.3/50.5 in|
|Track F/R||64.8/65.5 in|
|L x W x H||201.6 x 84.3 x 72.8 in|
|Passenger Capacity||143.6 cu ft|
|Cargo Capacity||16.0/49.4/93.8 cu ft|
|Weight dist. F/R||TBD|
|Fuel Capacity||26.4 gal|
|Est. Range||425 miles|
|Fuel Grade||91 octane (premium unleaded)|
|Standard Equipment||Height-adjustable air suspension 19-inch aluminum wheels Power sunroof Rain-sensing windshield wipers Rearview camera Bluetooth audio and phone connectivity CD/DVD player Power liftgate Heated front seats Automatic dual-zone climate control MB-Tex-trimmed interior Flat-folding second- and third-row seats 115V power outlet Roof rails Rear window wiper and washer Automatic headlights Collision prevention assist LED taillights and DRLs Mbrace2 w/trial subscription|
|Steel Grey paint||$720|
|Black leather interior||$1620|
|Heated steering wheel||$225|
|Blind spot monitoring system and lane-keeping assist||$850|
|Parking assist package||$1290||Front and rear parking assist Active parking assist Multi-view camera system|
|Lighting package||$1290||Active xenon headlights Adaptive high-beam assist Headlight washers|
|Premium 2 package||$5850||Auto-dimming, power-folding exterior mirrors Comand w/navigation MB Apps Voice control SiriusXM satellite radio w/6-month trial subscription Front seat memory Multi-color interior ambient lighting Front illuminated door sills Harman/Kardon surround sound audio system Keyless entry and ignition Soft-close doors Lockable rear storage compartment|