Used 2008 Mercedes-Benz M-Class Diesel Consumer Reviews
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Old Reliable
richard haehl, 03/31/2017
updated 04/09/2018
2008 Mercedes-Benz M-Class ML320 CDI 4dr SUV AWD (3.0L 6cyl Turbodiesel 7A)
43 of 44 people found this review helpful
I have owned this car over 10 years and it has been a pleasure to own. Pretty simple compared to new cars but a very reliable vehicle with many good years left. I would not hesitate to buy one this age with high miles. My wife says it is time to sell. She just wants something new with a little more horsepower! The suspension seemed a little soft after 10 years so I put new Bilstein shocks and springs under it to improve the handling. I had new bearings put in the all wheel drive unit that Mercedes always denied having an issue with. Mercedes fix is a new $4500 unit. You can buy the bearings for about $300 and a mechanic can do the repair in less than a half day. I like the 2008 because it is the 48 state engine without the urea addition that resulted in the run flat tires in 2009.
- Safety
- Technology
- Performance
- Interior
- Comfort
- Reliability
- Value
Best SUV ever!
RBL, 09/09/2010
2008 Mercedes-Benz M-Class ML320 CDI 4dr SUV AWD (3.0L 6cyl Turbodiesel 7A)
46 of 49 people found this review helpful
I ordered this car with all available options. Towing my horses on highways and hills is effortless and I have NEVER gotten less than 20mpg. I find the nav system very accurate but data entry is a pain. The Airmatic suspension makes a HUGE difference in the ride and handling quality over lesser-equipped M Class cars. There have been zero defects, so my only expense has been to replace the tires and 3 maintenance stops. An outstanding vehicle made in the USA!
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Good SUV
eric, 11/19/2008
2008 Mercedes-Benz M-Class ML320 CDI 4dr SUV AWD (3.0L 6cyl Turbodiesel 7A)
27 of 29 people found this review helpful
Bought this vehicle new and have been impressed with the handling and the fuel mileage. No one even guesses that this is a diesel when they are riding in it. One of the best features is the locomotive like pull while merging onto the interstate. Absolutely no problems finding diesel and with the large tank you cover a lot of distance. 27mpg in mixed driving.
Best SUV I have ever driven!
Purple-Ginger, 04/20/2008
2008 Mercedes-Benz M-Class ML320 CDI 4dr SUV AWD (3.0L 6cyl Turbodiesel 7A)
10 of 10 people found this review helpful
Have had the car for couple of months now. Great power under the hood - the turbo really makes a difference. The fuel economy is excellent. Once you get the hang of it you can get about 32MPG highway and about 20 city - I get about 25-26MPG for 50-50 city/highway. Not bad for an SUV with this size an power. Can't mention enough about the torque! All in all the best SUV I have driven (compared to Lexus, BMW models). Have taken it to the mountains - starts with ease and pure pleasure to drive up hill - gasoline engines are no match to the power!!!
Nice car but many little problems.
Fred, 03/19/2010
2008 Mercedes-Benz M-Class ML320 CDI 4dr SUV AWD (3.0L 6cyl Turbodiesel 7A)
15 of 16 people found this review helpful
The dealership is excellent and does its best, but my car had a battery drain problem that left me stranded in airport parking lots several times after long trips from Europe and Asia. After many interventions and, as long as a week at the dealership at a time, to check it out, they changed the battery. I suspect once the battery gets old it will discharge again but I only have a few months left on the lease. The car also has had small problems that should not appear on a 55K plus car.
An excellent SUV combines the goodness
WWW, 01/12/2008
2008 Mercedes-Benz M-Class ML320 CDI 4dr SUV AWD (3.0L 6cyl Turbodiesel 7A)
9 of 9 people found this review helpful
I own a Toyota minivan. I have tried Lexus Rx and GX 470, BMW X5, Toyota 4-RUnnner and Highlander hybrids before I settle down to this ML 320 CDI. All the Toyotas and Lexuss have the similar driving trait and characteristic, includ quiet, comfort but boring. BMW is impressive for its road handling and driving capability but it is louder and coarse. Its electronics is too complicated with a lots of trouble. The Mercedes combined all those goodness plus the advantage for fuel economy. So far I got 22-24 MPG combine local and highway in the break in period. The truck is more comfort and quieter than Lexuss and Toyotas. The road handling and drivability is definitely better than Lexus and Toyota
A good Mercedes Diesel
Tuscaloosa Tom, 10/14/2009
2008 Mercedes-Benz M-Class ML320 CDI 4dr SUV AWD (3.0L 6cyl Turbodiesel 7A)
19 of 21 people found this review helpful
SUV is more than we expected. Good driving experience, excellent mileage @ 30 mpg highway and 25 in town. Radio and MB tech pkg helpful. HD lights a must, XM radio and NAV work well. Seats comfortable even with MB Tex. Would definitely buy again. No problems so far in this nearly 2-year- old MB Diesel SUV. Bought the extended warranty to 100K miles.
Better looking than 2009 model
Bhhm, 05/20/2008
2008 Mercedes-Benz M-Class ML320 CDI 4dr SUV AWD (3.0L 6cyl Turbodiesel 7A)
8 of 8 people found this review helpful
Love the car. Got it a week ago and I'm most impressed with the power under the hood. It's like taking off in an airplane, you just don't feel the transmission shifting. I took it on a 600 km trip and performed with "flying" colors in the fuel consumption department.
Love my Mercedes M Class Turbo Diesel
Jim , 06/22/2008
2008 Mercedes-Benz M-Class ML320 CDI 4dr SUV AWD (3.0L 6cyl Turbodiesel 7A)
16 of 18 people found this review helpful
Sold my '03 BMW X5 and purchased my ML 320CDI in Jan '08. I was torn between the Mercedes and the new BMW X5 but chose the ML based on good looks, power and fun to drive. I find I just want to get in the car and drive. The SUV is smooth, quiet, luxurious and most of all great fun to drive. Terrific sound system. Average 22 mpg combined city/highway. No problems since I purchased it. Would highly recommend.
Why do hybrids even exist?
Mikey, 08/24/2010
2008 Mercedes-Benz M-Class ML320 CDI 4dr SUV AWD (3.0L 6cyl Turbodiesel 7A)
16 of 18 people found this review helpful
Wonderful vehicle. Terrific performance from all that diesel torque, yet it gets superb mileage (avg. 22.1 MPG over 45,000 miles). Very comfortable on long trips. Lots of storage. However, it's outrageous that memory seats are not standard equipment at this price. Maybe they are now standard on newer models? My dealer in Grand Rapids, Michigan is excellent, both sales and service. BTW, hybrids are a losing proposition. We already have diesel infrastructure in place, the technology is proven beyond a shadow of a doubt and the diesel complaints (noise, polution and smell) have been solved. My second M-B diesel won't be my last.
expensive piece of crap
baby786, 09/18/2014
2008 Mercedes-Benz M-Class ML320 CDI 4dr SUV AWD (3.0L 6cyl Turbodiesel 7A)
49 of 59 people found this review helpful
after 3 yrs of owning the ML320 CDI, I do have a lot of problems and expenses, the check engine light never ends, the lights always have to be changed at least every 3 months, as of this time my SUV has 58000 miles and the vehicle is in and out of the dealer, cannot fix the check engine light, I already spend almost $5000 . the vehicle has been there for a good 1 month, waiting for parts, then bring it home, drive for 5 miles, check engine comes back, they change a lot of parts, the SUV also has problem with acceleration, and the engine now is so noisy when you drive it. I thought this was the best vehicle I bought, this was the worst of all the brands I have.
Destroys Tires
Edward Vinca, 06/29/2009
2008 Mercedes-Benz M-Class ML320 CDI 4dr SUV AWD (3.0L 6cyl Turbodiesel 7A)
15 of 17 people found this review helpful
After 17,000 miles, tires developed excessive thumping. After a couple of conversations with the dealer, the dealer, as a favor, agreed to replace the tires, but I was responsible for the four wheel alignment. After 11,000 miles on the second set of tires, the thumping came back. Dealership agreed to check the alignment. According to them, it was within specs. They told me to talk to Michelin Tires. Michelin agreed to replace the tires as a favor. However, they are no longer responsible for wearing of the tires. So at this point, the car having 28,000 miles, the third set of tires has been put on. Mercedes will not accept this problem as their responsibility. HELP!
2008 ML320 CDI Diesel - way to go!
Peter Shiakallis, 10/30/2008
2008 Mercedes-Benz M-Class ML320 CDI 4dr SUV AWD (3.0L 6cyl Turbodiesel 7A)
19 of 22 people found this review helpful
Bought the ML320 CDI after much consideration vs the BMW X5. It is better than advertised on MPG! I get 24- 28MPG around town and 30-32MPG on the hiway! Minimum 600 - 700 miles per tankfull! Plenty of power and torque that no gas engine can match! No black smoke and no noise! Americans should re-educate themselves about diesel! No hybrid can match the power and range - period. It is way ahead of any competitor in this range and I am 100% satisfied and as a previous Mercedes Benz owner - this the best I ever had!
Breaks frequently but performs decent.
5hundo, 12/29/2016
updated 01/10/2019
2008 Mercedes-Benz M-Class ML320 CDI 4dr SUV AWD (3.0L 6cyl Turbodiesel 7A)
34 of 41 people found this review helpful
You'd think after over 100 years in the automotive manufacturing business, Mercedes would have been able to figure out how an oil seal works but apparently not, if the ML 320 CDI is any indication. Some owners have reported oil cooler seal failure with as little as 60k miles others see it at around 100k miles but EVERYONE gets it! To fix these seals requires turbo, and intake manifold removal, for which I was given a dealer estimate of $3,700. This is after a few electronic sensor failures, in addition to a fuel pump failure that cost over $1,000 to fix (low pressure fuel pump). The dealer network is useless! The parts counter can't even tell me accurately what kind of coolant I'm supposed to use. It originally came with yellow, then they switched... But to what? The forums say blue colored coolant but the dealership tried to sell me red?!?!?! The whole reason why I bought this car was to offer my wife years of care-free driving. That has not been our experience. The vehicle looks and drives well but it is frustrating to own at times.
- Safety
- Technology
- Performance
- Interior
- Comfort
- Reliability
- Value
Go diesel!
AgWagon, 10/19/2007
2008 Mercedes-Benz M-Class ML320 CDI 4dr SUV AWD (3.0L 6cyl Turbodiesel 7A)
6 of 6 people found this review helpful
This is a great SUV all-around, but the diesel clinched it for me. It just makes so much sense for trucks and SUVs. Yes, it's a hair louder than a gas engine under acceleration (which is excellent, by the way, because of all that torque). But cruising is very quiet, and there's absolutely no smoke or odor, ever. Bottom line: you get the space and utility you need at a thrifty 26 mpg. Plus, you can feel good about being green with the smaller carbon footprint. Really, you've got to try one.
worst invest I am going back to Honda
sc1298, 12/06/2014
2008 Mercedes-Benz M-Class ML320 CDI 4dr SUV AWD (3.0L 6cyl Turbodiesel 7A)
41 of 52 people found this review helpful
I purchased the ML 320CD as an upgrade to my 1988 Honda which after 200 thousand miles no major problems, never expected a MCB SUV will give me gray hair, I have changed several parts that in a less cheaper care start going bad close to 10 years, CD player went bad, the door lock went bad on the driver side one week later the passenger side is gone, the tire pressure sensor same story, bulbs blow weekly, now oxygen sensor need changing , changed the inlet port motor and now the disel filter need to change, the care is loosing power esp on an incline, the engine light is forever on, and the list goes on and on, i have spent at $10,000. for the year in repairs plus service, I am fed up, angry
Smooth and solid
oliverp, 12/03/2007
2008 Mercedes-Benz M-Class ML320 CDI 4dr SUV AWD (3.0L 6cyl Turbodiesel 7A)
5 of 5 people found this review helpful
After 1700 miles I can say this is a solid, safe, smooth package. The V6 turbo diesel, 7 speed transmission and AWD are a remarkable combination. The engine stays between 1,200 and 2,200 rpm most of the time, and with barely noticeable shifts or sound. The transmission provides engine braking automatically. Air suspension is adaptable and smooth. I drove up and down snowy, unplowed hilly roads all day yesterday without slips or slides, mostly in the Airmatic raised position. Surprisingly tight turning radius. Mileage 22-25 mixed Seating is very comfortable and interior appointments (brushed aluminum/ ultrasuede) are striking. Nice cargo management system. No defects at 1750 miles.
This SUV is underrated
Rich, 05/19/2008
2008 Mercedes-Benz M-Class ML320 CDI 4dr SUV AWD (3.0L 6cyl Turbodiesel 7A)
7 of 8 people found this review helpful
Have only had this ML320 for 5 weeks, but wow! I have had BMW's, Cadillacs and Jeeps, but nothing compares. Great to drive, unbelievable performance, and the mileage is tremendous, better than advertised. Need to get more experience with all the features, but so far, so great!
Diesel SUV that drives like a sports car
Steveo, 07/16/2008
2008 Mercedes-Benz M-Class ML320 CDI 4dr SUV AWD (3.0L 6cyl Turbodiesel 7A)
4 of 4 people found this review helpful
It is really fun to drive! This is unusual for an SUV (especially for a Diesel). The engine gives good low and mid range power and acceleration and is smooth and quiet. The mileage has been better than advertised. The iPod integration is nice.
Diesel Power and Sublime Beauty
mbzx, 01/25/2008
2008 Mercedes-Benz M-Class ML320 CDI 4dr SUV AWD (3.0L 6cyl Turbodiesel 7A)
6 of 7 people found this review helpful
I purchased a 2008 ML320 CDI with Premium II package in Sept. 2007 although I had been nervous about MB's less than stellar reputation in quality. My car has so far exceeded all my expectation in terms of performance and quality. The tremendous diesel power propels the car into any traffic when needed. But mostly I like driving very gently and the car rewards me with 30 miles on highways (when I am really gentle) and 23 miles in local/highway (40/60) mix on average. Its creature comfort is well designed and well executed. The car feels like a marble rolling on glass pane in highways. I am thoroughly enjoying the car and most probably will purchase GL320 CDI in the near future.
piece of crap
donnaw3, 05/12/2014
2008 Mercedes-Benz M-Class ML320 CDI 4dr SUV AWD (3.0L 6cyl Turbodiesel 7A)
23 of 32 people found this review helpful
tank god I bought the extended warranty otherwise I would be broke for sure. intake manifold 3500.00. then the turbo, transfer case, intake censor, particulant filter etc, 10k, fuel system, tires1200.00 every two years. 600.00+ for any routine service, new battery over 500.00, triple AAA wont touch a Mercedes, I bought this vehicle thinking it would e the very best ever. its apiece of junk. the Mercedes emblem on the rims wore off 3 years ago- piece of junk. I am shocked at a Mercedes vehicle. never again in my life and I m 50.
This is not a real Mercedes a Chrysler of the 80s
Blutec hater, 06/02/2018
2008 Mercedes-Benz M-Class ML320 CDI 4dr SUV AWD (3.0L 6cyl Turbodiesel 7A)
15 of 21 people found this review helpful
When your long term trusting mechanic tells you “need” to get rid of the vehicle you just bought for for 29,000 thousand and has less than 45K miles should have “red flagged” me for the pain I was about to receive. By far the worst vehicle I’ve ever owned in my entire life. When the bills for repairs of the turbo, intake valve problems, transmission, Blu Tec and tail light problems equaled more in the car than it was worth, I gave it away just 3 years later up at auction for $8700 a 20k loss for a car I thought I would have for 10 years plus. I will never buy a Chrysler,Mercedes, Dodge or jeep ever again!
- Performance
- Comfort
Really solid vehicle that gave 7 years hassle free
john dawson, 11/13/2016
2008 Mercedes-Benz M-Class ML320 CDI 4dr SUV AWD (3.0L 6cyl Turbodiesel 7A)
7 of 9 people found this review helpful
Great, solid reliable car until it hit 7 years then we had a few issues with fuel system and seat restraint. Drivetrain super solid and deisel was giving 22 mpg which is pretty good for a 4-ton tank. Overall thoroughly enjoyed the car, trading-in in 1 week and the only reason I'm not getting Mercedes again is the local dealership that just gouges terribly on price.
- Safety
- Technology
- Performance
- Interior
- Comfort
- Reliability
- Value
Impressive diesel SUV!
Scott, 12/30/2007
2008 Mercedes-Benz M-Class ML320 CDI 4dr SUV AWD (3.0L 6cyl Turbodiesel 7A)
3 of 3 people found this review helpful
Very surprised how well this diesel SUV handles. Extremely comfortable on the highway. Backing off a few mph significantly increases fuel mileage and can exceed sticker.
The best ever!
LHP, 12/09/2007
2008 Mercedes-Benz M-Class ML320 CDI 4dr SUV AWD (3.0L 6cyl Turbodiesel 7A)
3 of 3 people found this review helpful
What an unbelievable vehicle. I've always thougt the '91 Vette was the nicest car I have ever owned. The ML 320 CDI is now number 1. With all the concern about economy and emissions, it seems diesel is better than hybrid and E85, so I wanted a diesel. This car has far surpassed my expectations. I have never found driving more exciting, and I'm still learning about all the little gadgets and conveniences. I leased this one for 33 months, but expect to buy next time.
Great Experience
swankshop, 11/26/2007
2008 Mercedes-Benz M-Class ML320 CDI 4dr SUV AWD (3.0L 6cyl Turbodiesel 7A)
4 of 5 people found this review helpful
This car(truck) is smooth to drive, relatively nimble, quick, stylish inside and out, fuel economical, solid, sufficiently large and luxurious. It has all the gadgets and some time studying the manual to operate these gadgets is a must. On a recent trip from Ontario to Myrtle Beach and return, 3561.88 KM including mostly highway with speeds 65 to 85 mph and some local driving, we burned 307.44 Liters of diesel resulting in 32.73 mpg(imperial) or 27.25 mpg(US). The vehicle has just over 3000 miles and mpg should improve in the next year. There have been no faults large or small found. I consider myself to be easy on vehicles and found Saabs, Volvos, and Chryslers of the past to be excellent.
2008 ML 320 CDI
cfrazier, 04/26/2008
2008 Mercedes-Benz M-Class ML320 CDI 4dr SUV AWD (3.0L 6cyl Turbodiesel 7A)
4 of 5 people found this review helpful
As others,looked at RX250,X5,and ML. Came to MB ML in looking for SUV with better than average MPG. Diesel won me over and liked exterior above others. As some have noted, nav (need touch screen, improve intuitive flow) and signal stem (proximity to cruise control) need updating/improvement. MB could use better value packaging like Lexus. Start w/ P2 and tailor to need. Downshifting non-issue with slight and logical modification of driving habit. Very pleased with choice.
Exactly what I expected
Roscoe18, 11/09/2008
2008 Mercedes-Benz M-Class ML320 CDI 4dr SUV AWD (3.0L 6cyl Turbodiesel 7A)
5 of 7 people found this review helpful
It's no RR Sport. Not as fun- but 27.4mpg hwy and between 20-22 overall. The gas mileage is great and less carbon emissions. Diesel engine noise is annoying. Porsche will win if they can combine sport and "green" in the new Cayenne!
Comfort & Joy
Mtngirl, 12/07/2007
2008 Mercedes-Benz M-Class ML320 CDI 4dr SUV AWD (3.0L 6cyl Turbodiesel 7A)
3 of 4 people found this review helpful
I have only had the car for a week but I have a few observations for those who are looking at the 320 CDI. First, it was louder than I thought it would be, coming from a Toyota it is an adjustment. Second, the shifting is not as smooth as I remember when I test drove but not bad. Having said that, I think the car is superb. The mileage is pretty good, I have been getting between 19 - 22 in the city so far. The interior is unbelievable, very posh and comfortable. The controls are very intuitive which is nice. Put everything on auto and it does the rest. Rear cameras should be standard on all SUV's, what a great feature! All around great vehicle.