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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  Great Car - 2006 Mercedes-Benz M-Class
  By robliski - March 9 - 7:43 am

  Ive had this car for 5.5 years now. Its been great to us and has never left us stranded. This is a car that needs an owner that timely addresses all preventive maintenance items before they become repair items, because then it gets expensive. The all wheel drive system is great and it is like a tank in rain and snow. Solid! Good power. Very comfy ride. Plenty of room.

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  Can Built a Better Car - 2000 Mercedes-Benz M-Class
  By NOMORE - March 9 - 3:26 am

  Never will buy another Mercedes Benz, now I have a Volvo (a much better car. Benz should built a better car for this kind of price I have it seating in my driveway because the latest is the the horn flat ribbon cable inside the steering wheel assembly it broke & came off (my horn doesnt work anymore), never heard this from any other car before shame on Mercedes-Benz-forget about the steering power pump Ive paid twice to have it fix beside the recall- interior clothe by the windshield id coming off (both sides). No more Mercedes-Benz for me.

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  bad service - 2000 Mercedes-Benz M-Class
  By wenshen - March 6 - 5:58 pm

  This car keeps giving me problem. Every time the dealer charge me several hundreds just to check it. Once the dealer charge me $1000 for just checking the warning lights and not finding anything. The car is powerful and fun to drive in long-distance travels, but the bad service keep me away from buying a new benz car.

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  Disappointed Buyer - 2006 Mercedes-Benz M-Class
  By Jez - March 4 - 12:40 am

  A few months after purchasing my vehicle the air bag light came on. The problem was fixed but another problem came up. The coolant level indicator appeared. Recently, the car has been brought in for steering bearing problems and the transmission jerks. The steering bearing, computer module, and transmission valve has been replaced. But the car still jerks. I have brought the car in for this problem 4 times. Now they are telling me that the jerking is normal. Ive never driven a car that jerks so I dont think its normal. Im so disappointed that I bought a Mercedes and it turned out to be a piece of crap. I thought Mercedes makes good quality cars thats why its so expensive.

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  What an improvement! - 2006 Mercedes-Benz M-Class
  By Doc - February 24 - 3:43 pm

  Beuatiful redesign inside and out. No longer rides like a truck. The new V6 puts out more horsepower than most V8s in its class and is super quiet. Much more roomy and comfortable than previous model with too many perks to mention. Pay the extra money for the appearance package which includes 19" wheels, a chrome grille, and Alcantara seating surfaces (looks and feels like suede) MB really got it right this time!

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  Ill stick to Lincolns - 2003 Mercedes-Benz M-Class
  By jskeens - February 14 - 10:00 am

  The car is fine but nothing sets it apart from other luxury SUVs. My exp w/ the sales process was the only piece that went smoothly. Due to Linc, I am accustomed to receiving the model of loaner veh that I am having serviced. Mercs loaner car program consists of using the co-resident Enterprise office. That blows. The warranty has a couple nice perks but nothing worth dealing w/ their Service dept. After purchase, I received a letter for a recall that went out six months prior. Shouldve been fixed prior to sell of vehicle. Mercs Customer Service and Service depts could learn a lesson from Linc.

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  Huge improvement! - 2010 Mercedes-Benz M-Class
  By mh - February 9 - 7:23 pm

  I had a 2006 ML 350 with multiple problems. I was interested in a 2010 GL, but just couldnt justify the 85k sticker price with options. I took a 2010 ML350 for a drive and was very surprised at the improvements. The seats are unbelievable, and while everything looks similar to the 2006 model, there are improvements at every level. The ride was always great, especially on the highway, but the 2010 is even more comfortable. The fit and finish is better than any car I have ever owned (previous MB, BMW, etc...)

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  Solid Car/Truck - 2004 Mercedes-Benz M-Class
  By Rev - February 8 - 2:00 am

  It offers a more rugged, spacious alternative to the recent crossover SUVs, in case you do like to venture offroad, or pull a decent size boat. The new cars arent well suited to that lifestyle. I like the fact that I can play anywhere, and still look good going out at night. Nicer to have in a big city for parking, traffic than the other tougher SUVs, too. I think the bugs have pretty much been worked out, and that the satisfied majority of owners dont post or even read the review sites.

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  1998 ML-320 may not be worth the money - 1998 Mercedes-Benz M-Class
  By B. C. Brown - February 6 - 10:00 am

  The most unreliable vehicle I have ever owned has been my 1998 ML-320. This truck has had numerous problems with the electrical system and the engine. The engine was replaced with a new one in January 2002. From December 1999 to January 2002, this truck was in the "shop" about 15 times for various problems. MB North America paid for the new engine, as the manufacturers warranty had just expired. Lucky for me, as I would have never had the means or desire to purchase a new engine for this truck. The best that I can say about this truck is that it hasnt returned for repairs since the new engine was installed.

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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.