Mercedes-Benz M-Class Performance
Reviewers are generally pleased with the performance of the 2007 Mercedes M-Class based on successful improvements first made in the 2006 model, including the world's first-ever seven-speed automatic transmission in an SUV. "Its ride is smoother and its handling is more poised than the best of Detroit's truck-based sport utilities," says the.
The Mercedes M-Class is "unusually pleasant to drive," according to USA Today, and the majority of reviewers agree. "Both engines provide good acceleration and the vehicle hugs curves and absorbs bumps admirably," says the of the V6 and V8. Similarly, Kelley Blue Book praises the Benz's highway ride, noting it's "as smooth as you'd expect from any of the automaker's stately sedans, with the added benefit of being able to negotiate large rocks (or parking blocks) with exceptional composure. It's this silkiness that makes the SUV's confidence-inspiring cornering ability just that much more impressive."
Acceleration and Power
The base M-Class, the ML350, is powered by Mercedes' latest-generation 3.5-liter gasoline V6 engine, which generates 268 horsepower and 258 pound-feet of torque. According to Mercedes, the ML350 surges from 0 to 60 mph in 8.2 seconds. The ML320 CDI, new for 2007, is equipped with the 215-horsepower 3.0-liter V6 engine -- a diesel, which is unique to its class. The ML500 boasts a three-valve, twin-spark 302-horsepower V8. Finally, the ultraluxury ML63 AMG, also new for 2007, features a 6.2-liter V8 that generates a whopping 503 horsepower.
Most reviewers agree that the ML350, though the least powerful of the M-Series models, is more than adequate. Kelley Blue Book says, "Opting for the lower-priced, higher-mileage ML350 won't leave you feeling short-changed in the power department." Edmunds agrees but also points out a deficit, noting, "In terms of acceleration, the ML350 possesses plenty of passing power, but feels a bit shy on torque from a stop." For more punch, reviewers recommend shelling out for the V8-powered ML500, which is capable of accelerating from 0 to 60 in about 7 seconds. Autoweb.com says, "After a daylong drive, the difference between the two powertrains in terms of torque and horsepower--and the lack of a difference when it comes to fuel consumption--may justify the $10,000 premium you'll pay."
Both the 2006 ML350 and 500 improved 11 percent in fuel economy over the 2005 models. According to the EPA, the ML350 is rated at 15 mpg in the city and 20 on the highway, whereas the ML500 gets 13 in the city and 17 on the highway. But Autoweb.com feels that these ratings "are still atrocious ... A reasonable real-world average is probably three miles less for each, not much efficiency during a time when fuel economy is a growing priority among shoppers." All M-Class models takes premium gasoline, with the exception of the ML320 CDI, which takes diesel gasoline and is rated at 19 mpg in the city and 24 on the highway.
All four models feature the world's first seven-speed automatic transmission, which Auto Mall USA calls "the best automatic Mercedes has built." USA Today says, "Five speeds are common, six exemplary, so Mercedes' seven-speed gearbox is a bragging point. To manually use those seven gears, you tap buttons on the back side of the steering wheel (the side toward the front of the vehicle). That works dandy." But MSN notes, "The stalk can be tricky to use if a driver is in a hurry. For instance, it requires more than lazy concentration to select a gear, and the 'park' gear position is gotten by pushing in the stalk."
Automobile Magazine also finds fault, noting, "Unfortunately, this electronic manu-matic erroneously believes it's smarter than the driver. Upshifts, want them or not, are automatic at the 6400-rpm redline ... The theory is that no driver should be left hanging during a passing maneuver, needing an upshift to muster more speed. Our contention is that any driver resourceful enough to choose the manual mode should be able to punch the button on cue."
Handling and Braking
The 2007 Mercedes ML350 features power rack-and-pinion steering that receives mixed reviews. "Test drives on twisting mountain roads showed the M-Class to have quick steering with Mercedes' slightly heavy, but reassuring, feel," says MSN. Autoweb also speaks highly of the handling, noting, "Tight maneuvers and U-turns are easy, thanks to a decent turning radius" -- one that, at 37.9 feet, is smaller than the X5, Escalade and SRX, according to the .
Others, like Automobile Magazine, disagree: "The steering is slow and slightly numb to the touch, discouraging maneuvers that might upset a copasetic cruise." Edmunds calls the steering precise but says it "doesn't offer much feedback and feels a little dead in the center." To improve steering feel, reviewers recommend adding the optional AirMatic suspension package, which includes speed-sensitive power steering and comes as part of the P3: Premium III Package.
The M-Class features a body-on-frame structure with twist resistance, giving it a solid feel. A majority of reviewers are pleased with the fully independent front and rear suspension, which the Kelley Blue Book also praises that the stiffer chassis "helps eliminate rattles and vibration." Automobile Magazine, however, doesn't like the "floaty feeling, which should be a hit with customers moving up from Buicks, but everyone else should exercise this escape clause: add the optional AirMatic suspension package that includes speed-sensitive power steering, air springs, and three-way adjustable dampers." The special suspension increases ground clearance up to 11.5 inches and offers several settings --sport, normal and comfort--to change the driving experience based on the terrain.calls "firm by American standards, but not harsh or floaty ... Yet at no reasonable speed was the handling anything but superbly balanced."
The ML350 includes an electronically modulated Sensotronic brake system, which most reviewers agree "supplies a sure-footed pedal and stops this SUV quickly," according to Edmunds. Though reviewers say the new electronic system takes practice to use, MSN's reviewer says, "I soon got used to it and appreciated the strong brakes. Road manners were very sporty for a heavy SUV." But Auto Mall USA has a criticism, commenting that the brakes "still don't have the smooth, linear feel of the best mechanically actuated brake systems. Nice smooth stops can be tricky without practice."
The Mercedes-Benz M-Class has permanent four-wheel drive using a system that diverts power to the wheels that can grip in necessary situations. The system works automatically, requiring no action from the driver. The U.S. News reviewer Rick Newman calls the M-Class "a fully qualified off-roader too, with full-tilt-boogie four-wheel drive instead of less rugged all-wheel drive. Options, like specially modified off-road anti-lock brakes and an air suspension system that raises ground clearance, will convince die-hard trail buffs."calls it a "clever four-wheel-drive system that will pull you through even if three of the wheels have no traction."
A standard one-button off-road driving program allows the driver to simultaneously engage programming recalibrations of the traction system, anti-lock brakes, engine management, and automatic transmission. In addition, all M-Class models come with downhill speed regulation, which automatically modulates the throttle and brakes and maintains a preset crawl speed when descending hills. A hill-start assist function helps prevent unwanted vehicle rollback when taking off from a stop on an incline by automatically maintaining brake pressure for approximately one second after the driver releases the brake pedal.
All M-Class models are rated at 5,000-pound towing capacity with the optional Class III trailer hitch. Auto Mall USA says, "We have little doubt that three of the four, including the new M320 diesel, would be up for the job (the diesel generates as much torque as a large displacement V8). We'd have some doubts about the gasoline V6 in the ML350, however. If towing a substantial load were a regular part of our routine, we'd look at the ML320 CDI or the ML500." Kelley Blue Book also notes that the ML320 CDI diesel is the way to go for those who expect to tow frequently because it has "the towing capability of a V8 with the fuel mileage of a frugal four-cylinder."
ML350 V6 base model
The base model comes standard with a 3,498-cc double overhead cam 24-valve V6 engine. It puts out 268 horsepower and 258 pound-feet of torque. The engine is paired with a seven-speed electronically controlled automatic transmission with Direct Select shifter.
ML320 V6 CDI Diesel
The diesel model comes with a 2,987-cc 3.0-liter DOHC 24-valve V6 engine. It puts out 215 hp and 398 pound-feet of torque. Like all M-Class models, the engine is paired with a seven-speed electronically controlled automatic transmission.
The ML500 comes with a 4,966-cc DOHC 24-valve V8 engine. It puts out 302 hp and 339 pound-feet of torque. Like all M-Class models, the engine is paired with a seven-speed electronically controlled automatic transmission.
ML63 AMG V8
The ultraperformance ML63 AMG comes with a 6,208-cc DOHC 32-valve V8 engine. It puts out 503 hp and 465 pound-feet of torque and includes an AMG-modified engine management system. The engine is paired with a special AMG Speedshift seven-speed automatic transmission.