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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  Solid Delivery - 1999 Mercedes-Benz M-Class
  By Indianwood - February 6 - 10:00 am

  I drive the ML for both city and highway use in the metro -Detroit area. Great in all weather. Havent had any problems with the car compared to various issues that Ive read about in magazine and web-sites. Great value for the money in terms of features and re-sale.

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  Very Pleased with ML 320 - 1999 Mercedes-Benz M-Class
  By femmesophisticate - February 2 - 2:00 am

  I traded my BRAND NEW JGCL with 16K miles on it due to numerous problems. Got the 99 ML320 for an excellent price with under 42K miles, and I am not looking back. The car handles well, and is excellent in wintery weather/ice. Acceleration is good (especially in highway traffic), and my choc lab LOVES this car - no more lurching off the back seat when I drive off due to excellent stability! Just to be safe, bought an extended warranty for an additional 36k miles - have not had to use it yet, so maybe I wasted my money on that. Overall, an excellent buy. Now, I just have to convince my family to bury me in it when the time comes!

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  Finally the real M arrives - 2003 Mercedes-Benz M-Class
  By emster320 - January 26 - 10:00 am

  For me, people who buy the M-Class are well-informed, practical and have an appreciation of the delicate balance between luxury and utility.I was truly impressed with the X5 but it didnt have the Ms cargo room/utility.Drove the MDX-wide track, excellent engine- but it lost points in the luxury department (plus 3rd row seating is actually smaller compared to the M). Sequoia? Quite impractical for my needs. Consider a vehicle that will inflict the least damage to the other vehicle-lower bumper and crumple zones. Dont be persuaded by emotional reviews. Do your own research and come to a conclusion. Have a safe trip and tread lightly!

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  Saved my ass - 1999 Mercedes-Benz M-Class
  By pueblo - January 9 - 10:00 am

  No better vehicle than one that gets you through a 16 inch snow storm, 8 inch ice storm, 24 hour sleet storm through 4 states in 16 hours on old tires and yet is 4 years old without a mishap. All the while watching drivers get in all manner of accidents in states that have no clue how to deal with inclement weather. WV actually had pick-up trucks with plows on I-79!

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  A "Champ" - 2004 Mercedes-Benz M-Class
  By Jeff - December 28 - 4:06 pm

  My 04 ML350 is my 4th ML; I was hit a 55 head on in my 99 and was uninjured. These are incredible vehicles, best safety available, great on/off road. Lacks come luxury features and mpg is horrible even w/v-6. Tight turning ratio, good seats; very heavy and capable. If you want a SUV that is very safe, handles well, comfortable, holds and tows lots of cargo, this is a great buy. The newer models are even better driving, but lack the turning ration and low range gear for extreme conditions. Drivers need to be aware of how heavy it is when braking and anticipating turns. The amount of steel and safety features are simply unavailable elsewhere. Eats tires and brakes, but stops very well.

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  Not what I expected! - 2006 Mercedes-Benz M-Class
  By L Wian - December 26 - 12:23 am

  Picked up my ML 350 Nov 2005. After driving 25 miles the "Check coolant level" message came up. I took it to the dealer who checked the hoses. 75 miles later the same message reappeared. The dealer said to bring it in. They found a leak in the head gasket, and the car had only 650 miles on the odometer. But the most frustrating thing is I took it in on Jan 19th. It is now March 2 and the car is still in the shop!According to the dealer all parts have to come from Germany. I am at my wits end. For a $50,000 car this is totally unacceptable! This is Mercedes reliabilty for you!

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  My 02 ML500 - 2002 Mercedes-Benz M-Class
  By SW - December 22 - 7:20 am

  My ML500 has been a great car. Overall quality is very good. I currently have just over 90000 miles. Only problems have been radio vol going up and down w/o cause. Fixed by MB of Albq. NM after about 5 visits. I have always been treated with exceptional care by MB of Albq. Also tranny went out at about 70K miles. Fully covered by MB starmark warranty. I do tow a fair amount about 2K pounds (motorcyles). Vehicle always tows well and is always fun to drive. I have taken on pretty rough 4x4 trips with no problems and not new rattles. I always appreciate my ML after driving other vehicles that are not MB. Fuel economy is not good but I get about 13 in town and 16- 17 hwy w/o trailer. Lots of pwr

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  Safe and Solid - 2004 Mercedes-Benz M-Class
  By William Brenner - December 17 - 10:00 am

  My 3rd ML since 1998. This one is the best. 8 air bags, super brakes and handling on all surfaces. 13-15 mpg city, 20 intercity at steady 70 mph. Ive driven MLs in snow, ice, slush, 15 below zero, wet and Ive never been disappointed. Although dated after 6 years the stylingis still better than most newer suvs.

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  Great SUV but - 2000 Mercedes-Benz M-Class
  By tarrid - November 8 - 7:19 am

  Real fun to drive, lots of power with the 4.3l. Nicely designed vehicle. but could have been made better. I have driven this ML for about 1 year now and if you dont stay on top of things it would fall apart. Just the up keep will put you in the red. Parts cost alot (dont buy from the dealler) unless they are small parts. $100 for a oil change ( oil and filter ) and i do it my self. synthetic oil only. $100 for the 16 spark plugs. super gas only $$$$$$$$ Tires $$$$$$, Power window switch. Check engine light on and off all the time. I knew it would cost abit more to keep (Mercedes Benz ) but i have a family and a life. This is a very time and money consumming vehicle to own.

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  Love It or Sell It - 1998 Mercedes-Benz M-Class
  By Perplexed Owner - November 7 - 10:00 am

  A few minor annoying problems for first 3 yrs (23000 miles)-- glove box, front seat adjustment handle, etc. Fuel pump failed in 3rd year. Faulty work on fuel pump resulted in a second replacement in the 4th year (28000 miles). The 4 year warranty is definitely valuable.