Overview & Reviews

While Mercedes-Benz will always be a quintessentially German automaker, its M-Class SUV has always been an American at heart. To begin with, it's built in Alabama and has been since it first burst onto the scene as one of the first luxury SUVs. The U.S. of A is also the M's primary market, as its sizable dimensions and mostly thirsty engines play much better in Frankfort, Kentucky, than they do back in Frankfurt, Germany.

Regardless of its origins, however, each generation of the Mercedes-Benz M-Class has been better than the last. This is especially true of the second generation, which replaced the original model that soldiered on through eight years of subpar reliability and build quality. As such, used shoppers are urged to consider the M-Class from 2006 and later. If you're interested in a newer model, however, the latest, third-generation M-Class is a subtle evolution of the previous one, upping the ante with even more power and features.

Although it's undeniably a solid choice for a midsize luxury SUV, there are many worthwhile and less expensive competitors in the premium SUV segment. As such, it's certainly worth a look around before you settle on this Germanic American.

Current Mercedes-Benz M-Class
The Mercedes-Benz M-Class midsize luxury SUV's exterior styling strikes a balance between traditional M-Class cues and the latest ones from the Mercedes-Benz line. As always with a Mercedes, however, it's the quality of construction and all-around feeling of solidity that make it stand out. Other key strengths include its diverse engine lineup, comfortable seating and excellent brakes. With only five seats, however, it's less family-friendly than some rivals that offer third-row seating, and its price can be considered quite expensive.

The current M-Class is available in four different trim levels defined by their engine: ML250 Bluetec, ML350, ML400 and ML63 AMG. All come with a seven-speed automatic and all-wheel drive ("4Matic") except for the ML350, which can be had with either rear- or all-wheel drive.

Under the hood, the ML250 Bluetec has a turbocharged 2.1-liter four-cylinder diesel with 200 horsepower and a healthy 369 pound-feet of torque. The ML350 comes with a 3.5-liter V6 that produces 302 hp and 273 lb-ft. The ML400 features a turbocharged 3.0-liter V6 that produces 329 hp and 354 lb-ft.

A beast apart from the rest of the lineup is the powerhouse ML63 AMG that boasts a turbocharged 5.5-liter V8 with 518 hp and 516 lb-ft. Output is even greater -- at 550 hp and 560 lb-ft – if you opt for the AMG Performance package. The ML63 AMG also includes active roll stabilization, sportier suspension and steering tuning, 20-inch wheels, stronger brakes and special interior trim.

All M-Class models come similarly equipped with standard items like a sunroof, a power liftgate, heated power front seats, the latest COMAND electronics interface, Bluetooth and an emergency communications system. Optional highlights include a panoramic sunroof, keyless ignition and entry and "multicontour" front seats with massage functions. The On/Off Road package is notable for its adaptive air suspension (that improves both ride and handling qualities) as well as its two-speed transfer case, six-mode terrain selector and underbody skid plates.

In reviews, we've been impressed by the Mercedes-Benz M-Class' brisk performance and strong brakes. Handling is confident enough around corners, but the electrically assisted steering is a little too light in effort and lacks the subtle feedback we've come to expect from Mercedes-Benz. Interior quality is excellent, as expected, though the more rounded dash design reminds us more of the distantly related Jeep Grand Cherokee in its appearance than its squared-off Mercedes siblings. Overall, the M-Class is solid choice for a luxury SUV, but as there's so much to choose from in this segment, taking a look at a few different competitors as well is a good idea.

Used Mercedes-Benz M-Class Models
The current third-generation Mercedes-Benz M-Class debuted for 2012. The following year brought the optional On/Off Road package (replacing the Dynamic Handling package) as well as the massage functions for the front seats.

Note that these M-Class models differed from today's lineup in terms of a few engine offerings. Specifically, compared to the current ML250 Bluetec, the 2012-'14 ML350 Bluetec had a more powerful but less fuel-efficient turbodiesel V6 with 240 hp and 455 lb-ft. Also available those first three years was the ML550 with its 4.7-liter turbocharged V8 good for 402 hp and 443 lb-ft.

The previous, second-generation M-Class was produced from 2006-'11. Though similar in appearance to the current model, this M-Class differs in its engine choices, hydraulic versus electric steering, slightly lower-quality interior, and electronics controls that were less user-friendly than those of its contemporary competitors.

This generation was introduced with only two trims. The ML350 came with a 3.5-liter 268-hp V6, while the ML500 was powered by a 5.0-liter 302-hp V8. Both came similarly equipped.

The next year saw two additional models join the line. The ML320 CDI featured a relatively fuel-efficient diesel engine (215 hp, 398 lb-ft of torque) that didn't have California emissions approval, while the performance-oriented ML63 AMG came with a 6.2-liter V8 good for 503 hp. It also included a number of other performance and handling upgrades.

The ML550 replaced the ML500 for '08, boasting a 5.5-liter V8 good for a much healthier 382 hp. The following year saw the advent of the 50-state-compliant and renamed ML320 Bluetec, along with a base rear-wheel-drive ML350. Every ML also received a face-lift front and rear and an available updated COMAND system with Bluetooth phone connectivity.

For '10, the diesel model became the ML350 Bluetec and received a smidge more torque, but the bigger news was the addition of the ML450 Hybrid. Featuring a gasoline-electric hybrid system co-developed with BMW and General Motors, this ML featured a 3.5-liter V6, a pair of electric motors and an advanced transmission for a total of 335 hp. It achieved 22 mpg combined, which is good, but the cheaper Bluetec managed 21.

In reviews, our editors found the second-generation M-Class imparted that feeling of impenetrable solidity one expects from Mercedes-Benz. With the optional air suspension, the ride quality was impressively supple. Behind the wheel, one will find plenty of room and excellent support from the premium multicontour seats, as well as superb cabin materials. Major downsides included fussy electronic controls, pokey acceleration with the V6 engine, and higher ownership costs than some other luxury SUVs.

The first-generation Mercedes M-Class debuted in 1998 with the ML320, which was motivated by a 3.2-liter V6 with 215 hp. More standard equipment was added in 1999, as well as a more powerful and luxurious V8-equipped ML430 model. Detail improvements in 2000 included 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. These early ML models suffered from extensive quality-control issues that often resulted in expensive repair bills, so we wouldn't recommend them as used-car purchases.

The Mercedes-Benz M-Class was 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 included new bumpers, clear-lens headlights and restyled mirrors. In late 2003, the ML350 replaced the ML320, featuring a larger 3.5-liter 232-hp V6.

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.

User Reviews:

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  Many improvements - 2002 Mercedes-Benz M-Class
  By rueym - February 20 - 11:26 pm

  If you get the 500 its worth the money compared to any other in its class. Its durable, so far no problems. Although many are complaining its because they have a lower model, the 500 is solid and performs well!

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  Like the new 03 ML500 - 2003 Mercedes-Benz M-Class
  By fj - February 16 - 2:00 am

  especially the standardized NAV/GPS system... fancy control panel..

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  First ML - 2010 Mercedes-Benz M-Class
  By Dwight Mcfarlane - February 14 - 11:16 am

  I purchased this vehicle on Sept.4th 2009. I will admit that I did an extensive study on this vehicle including test driving an 08 and three 06s of this same model and make. I also test drove eight other comparable SUVs of the same size. However, I always went back to the ML because it was just a cut above. The older MLs that I test drove had held up quite well telling me that a new one should be just fine.(including the improvements).

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  great car and keeps runnning - 2002 Mercedes-Benz M-Class
  By maizeandblue23 - February 10 - 4:48 pm

  I have 120,000 miles on the ML. Its a safe, big interior with huge trunk and handles very well.

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  Comfort and Performance - 2005 Mercedes-Benz M-Class
  By Luxury and Practical - February 8 - 5:56 pm

  This vehicle has taken its hit on fuel economy but I didnt buy this Mercedes Benz ML 350 (special edition) for this purpose. Its the best all around SUV that I test drove including the BMW SUV 5.0 which I liked but which was overpriced. The special edition includes 17 inch wheels which add to the comfort of the ride. Ive owned a Cadillac Escalade and had test drven all the comparable SUVs prior to buying and concluded that this luxury SUV had it all. The ride is comfortable when you drive this SUV unlike other SUVs which drive like a truck.

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  Most Pratical Luxury SUV - 2000 Mercedes-Benz M-Class
  By nes - February 5 - 10:00 am

  Living on the top of a mountain dirt road, down a 1200 foot driveway - we got 28 feet of snow in 2002-03 - we really need an SUV. This car has performed in all weather getting us safely home, is a pleasure to drive on the highway - quiet and nimble - and has never caused any maintenance issues other than annoying lights out on the dash. A winner in my book - roomy, comfortable, safe, reliable.

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  OK, needs improvement in next generation - 2000 Mercedes-Benz M-Class
  By drewjk - February 5 - 10:00 am

  Lots of electrical problems. Engine is loud, doesnt sound good either, slow acceleration. Throbbing wind noise with rear windows rolled down. Fuel tank too small (230mi range) Fuel filler not compatible with certain pumps Needs cutting edge safety features Small cargo area. Wind noise from rearviews low road noise however Good ride and handling, however stability is questionable Comfortable, very easy to drive, great turning radius. great brakes for SUV dealer service is great bad cupholders

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  Avoid this like the plague - 1999 Mercedes-Benz M-Class
  By C-Mun - February 1 - 6:56 pm

  Ive had my ML430 for about 1 year and have spent close to $5000 in repairs. I wish I researched more on this problematic SUV. Ive soon realized I am not the only ML owner that feels that way. After 2 days of owning it, the transmission had issues. It wouldnt shift out of 2nd gear (common prob), Gas guage not working properly (common prob), then Catalytic converter started making noise($1500 to replace), Window/Door lock switch panel didnt work (common prob NOTE: theres a relatively easy DIY fix for the window. Now the it wont start because the factory immobilizer has died. Let alone the normal maintenance.

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  an expensive meds - 2014 Mercedes-Benz M-Class
  By jonathan - January 20 - 5:02 am

  Terrible ride quality- rides like a stone! Terrible seats- firm and not comfortable! Terrible off-road- large wheel and thin tires make for a scary off road situation! Good acceleration and breaking. Mercedes has lost their way with their ML suv. The suspension clatters and bangs over every crack on the road! The transmission shifts abrubtly all of the time and with the large wheels and thin tires it is terrible off road! The seats are very uncomfortable. The only pros I can speak of as an owner are the reliability

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  Excellent! - 2004 Mercedes-Benz M-Class
  By zoidamoid - January 18 - 2:00 am

  This car is a great car to have. Handles well in bad weather and is SO comfortable. I wouldnt recommend any other car. Its a 10 in my book!