Mercedes-Benz M-Class Review

2009 Mercedes-Benz M-Class ML320 BlueTEC SUV Shown

Since the introduction of the Mercedes-Benz M-Class, many other premium automakers have entered the midsize luxury SUV market attempting to dethrone the king of the hill. And Mercedes-Benz has responded with constant improvements to its midsize SUV over the years, including increased feature content and performance, updated styling and attempts to address the various quality issues plaguing early models.

Despite Mercedes' efforts, however, the original truck-based M-Class was starting to show its age against better-dressed and better-handling car-based SUV competition. So, after eight years on the same aging platform, Mercedes finally reached for a much-needed clean sheet of paper for the second-generation M-Class, which debuted for the 2006 model year. The resulting second-generation M-Class models are more powerful, better-handling and loaded with upscale features. They're also roomier inside for legs and shoulders: 6 inches longer and 2 inches wider, and riding on a 4-inch-longer wheelbase than the old ML. There are presently four distinct Mercedes-Benz M-Class models: ML320 CDI, ML350, ML550 and ML63 AMG.

Though it has less ground clearance than the original, the current M-Class' unibody chassis is also stiffer, lighter and better able to deliver the ride quality expected of a Mercedes-Benz intended primarily for use on pavement. Additionally, the second-gen ML offers a more aggressive stance and a more stable platform for powering its permanent 4WD system.

The design of the cabin isn't radically different, but thanks to its extra dimensions, the current M-Class has an airy feel that the old ML lacked. The quality of materials is much improved, and there are large expanses of wood and aluminum trim, as you'd expect in a vehicle with a base price in the $40Ks. One of the most noticeable changes inside is the lack of a console-mounted shifter, replaced by a small control stalk on the steering column to make room for American-size cupholders.

The original ML caught a wave of SUV popularity and rode it out longer than even Mercedes could have hoped. But even though there are now many worthy competitors in the premium SUV segment, we think the M-Class' combination of cutting-edge safety features, satisfyingly sure-footed on-road performance and bountiful creature comforts will keep it high on shoppers' lists.

Current Mercedes-Benz M-Class

The Mercedes-Benz M-Class is a tasteful and modern five-passenger sport-utility. Trim levels include the ML350 with a 268-horsepower 3.5-liter V6 and the ML550 with its 5.5-liter V8 churning out 382 hp. If you're looking to spice things up with a bit more distinction, you can now also choose a fuel-slurping 503-hp ML63 AMG high-performance version or a fuel-sipping 215-hp ML320 CDI diesel. The diesel ML doesn't cost much more than the ML350 and promises mileage in the 20s, while offering useful low-end power and none of that diesel stink you remember from the 1980s. However, it is not presently offered in California or California-emissions states due to strict emissions regulations.

The standard ML350 and ML320 CDI are well-equipped with full-time four-wheel-drive, automatic climate control, power-adjustable front seats and an eight-speaker CD stereo with an auxiliary audio jack. Other available features across the class include adaptive bi-xenon headlamps, larger wheels, a surround-sound audio system, DVD-based navigation, rear-seat entertainment system, keyless ignition/entry and a sunroof. The ML63 AMG adds unique styling elements and performance-oriented mechanical bits along with its larger engine.

In reviews, our editors have found that the current Mercedes-Benz M-Class feels lighter on its feet than the original, yet remains just as sure-footed. And with the optional air-spring suspension, the ride quality is as plush and responsive as one could hope for in a vehicle of this type. Behind the wheel one will find plenty of room and excellent support from the premium multicontour seats. If your goal is the head of the class and cost is no object, the new M-Class should be on top of your shopping list.

Past Mercedes-Benz M-Class Models

The present-generation M-Class was introduced for 2006 in ML350 and ML500 guises. The ML320 CDI and ML63 AMG arrived the next year, while the ML550 became the standard V8 model for 2008.

However, shoppers of used luxury SUVs will likely encounter first-generation ML320s and ML430s. Mercedes-Benz entered the SUV race in 1998 with the ML320, offering the best of both the car and truck worlds from a fresh new design. More standard equipment was added in 1999, as well as the addition of a more powerful and luxurious V8-equipped ML430 model. Detail improvements in 2000 include an interior freshening and optional third-row seating on all M-Class models, and in 2001 the TeleAid emergency calling system became standard across the lineup.

Earlier models did not escape Mercedes' quality control problems or fussy COMAND operating system of the late '90s era, however. For these vehicles, we strongly suggest you shop carefully and also consider an extended warranty to go with your vehicle purchase.

The Mercedes-Benz M-Class was vastly reworked and improved in 2002 with the modification of more than 1,100 parts and the substitution of the ML500 for the previous ML430, now featuring a 5.0-liter V8 packing 288 hp. Telltale signs include new bumpers, clear-lens headlights and restyled mirrors. In late 2003, the ML350 eclipsed the ML320, with a larger 232-hp V6 engine replacing the original 215-hp unit.

Mercedes was also first to market with a high-performance luxury SUV, offering the ML55 AMG from 2000-'03. Sold in limited numbers, this pricey ML had a 5.4-liter V8 good for 342 hp and 376 lb-ft of torque, along with a sport-tuned suspension.

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* Edmunds.com maintains vehicle data as far back as 1990.