High mileage W166s (80k+)?
Thread Starter
Member
Joined: Sep 2015
Posts: 139
Likes: 16
From: Detroit area
2015 S550 Coupe; 2025 EQS 450 SUV
High mileage W166s (80k+)?
I'm currently looking at getting a 2012 or 2013 ML350 (gasoline) for my wife, and I've come across a number of 2012s around or above the 100,000-mile mark. I've had good experiences with other high-mileage Mercs, so I'm trying to figure out what the sweet spot for price vs. mileage is. Obviously, I'd be looking out for maintenance records, provenance, but with some models that doesn't rule out many surprises.
When I searched MBWorld, I was surprised to find relatively few posts about high-mileage issues with W166s. The only consistent trouble seems to be with the Bluetecs. I'm hoping that, generally, the lack of posts equates to lack of common problems. Does anyone have any recommendation to stay away from a gasoline W166 with over 80k or 100k miles?
Also more specifically, has anyone had any bad experiences with maintaining the W166's Airmatic and Dynamic Curve? I've only come across one example with those two options. The dealer was transparent enough to send the inspection sheet with the issues it's currently got, including "front and rear level arms seized", "suspension sitting low in the front", cupped tires and "trans pan and rear main leaking". Even though it's sold at a heavy discount, I feel like this is a money pit just waiting to happen. Does anyone disagree?
Thanks in advance for all your thoughts.
When I searched MBWorld, I was surprised to find relatively few posts about high-mileage issues with W166s. The only consistent trouble seems to be with the Bluetecs. I'm hoping that, generally, the lack of posts equates to lack of common problems. Does anyone have any recommendation to stay away from a gasoline W166 with over 80k or 100k miles?
Also more specifically, has anyone had any bad experiences with maintaining the W166's Airmatic and Dynamic Curve? I've only come across one example with those two options. The dealer was transparent enough to send the inspection sheet with the issues it's currently got, including "front and rear level arms seized", "suspension sitting low in the front", cupped tires and "trans pan and rear main leaking". Even though it's sold at a heavy discount, I feel like this is a money pit just waiting to happen. Does anyone disagree?
Thanks in advance for all your thoughts.
Member
Joined: Nov 2016
Posts: 118
Likes: 8
From: Birmingham
GLE 350 4matic-Porsche Cayman
I recently turned 82k on my 2012. Asside from warranty work [flex disks and oil and tranny gaskets] the only thing I have been required to pay for is the main battery [$400]. I had the extended elp warranty. It was worth every penny. I do not have airmatic, however.
Member
Joined: Jul 2012
Posts: 102
Likes: 58
From: Chicago
2020 GLE450 / 2003 BMW M5
I'm at 110k with a 2013 ML550 w/ every option except Surround View Camera. Bought CPO w/ 3yr warranty. I love mine, but it's had a few challenges. Surprisingly, Air Springs haven't failed and not a single problem with the Active Curve System.
- Rear Tailgate Latch Failed, Replaced
- Fuel Injectors Leaked - replaced ECU, Wiring Harness, and Fuel Sensor (damaged by leaked fuel)
- Clacking Noise on Startup, Check Valve Replaced
- Right Rear Airmatic Damper Leaked, Replaced
- Clunk from Front on Turn, Right Half Axle Replaced
- Multi-Contour Seat Reservoir Exploded, Replaced
- Run Flat Tires Failed, Replaced w/ non-RFTs
- Battery Failed, Replaced
- Brake Pads / Rotors Front & Rear ($$)
- 3 windshields replaced (Arizona rocks)
Right now I still have a slight clunk on left turns which is likely coming from the other front half axle. Not sure if that's tied to 4matic or what.
If you pickup a RWD non-airmatic ML350 without ACS or Multi-Contour, there should be few problems if it's been properly maintained.
Find a highly optioned one and there may be a few issues to address. The most onerous repair was the leaking injectors which I think is unique to the M278 motor in a specific time span.
Given the choice, I'd make the same decision again. Key part being a warranty. ACS and airmatic give a fantastic highway ride. On/Off Road Package is surprisingly capable. Find what level of risk you're comfortable with and make a decision.
- Rear Tailgate Latch Failed, Replaced
- Fuel Injectors Leaked - replaced ECU, Wiring Harness, and Fuel Sensor (damaged by leaked fuel)
- Clacking Noise on Startup, Check Valve Replaced
- Right Rear Airmatic Damper Leaked, Replaced
- Clunk from Front on Turn, Right Half Axle Replaced
- Multi-Contour Seat Reservoir Exploded, Replaced
- Run Flat Tires Failed, Replaced w/ non-RFTs
- Battery Failed, Replaced
- Brake Pads / Rotors Front & Rear ($$)
- 3 windshields replaced (Arizona rocks)
Right now I still have a slight clunk on left turns which is likely coming from the other front half axle. Not sure if that's tied to 4matic or what.
If you pickup a RWD non-airmatic ML350 without ACS or Multi-Contour, there should be few problems if it's been properly maintained.
Find a highly optioned one and there may be a few issues to address. The most onerous repair was the leaking injectors which I think is unique to the M278 motor in a specific time span.
Given the choice, I'd make the same decision again. Key part being a warranty. ACS and airmatic give a fantastic highway ride. On/Off Road Package is surprisingly capable. Find what level of risk you're comfortable with and make a decision.
Newbie
Joined: Apr 2017
Posts: 5
Likes: 0
2012 ML350 4Matic
Just bought a 2012 ML350 4Matic w/98k miles on it for $22.5k.
Full service history and CarFax. Non Airmatic and non Dynamic Curve. Bought it "as is." No problems worth mentioning in the history. Runs great and everything works.
Had to put a new set of tires on it, repair some minor wheel rash on a couple of wheels and replace the windshield because it was severely pitted by road debris. Also added a full set of WeatherTech mats, MB valve stem caps, and new license plate frames and screw caps. Front passenger side mudflap was torn. Cut the dangling part off and cut off the driver's side front mudflap to match. The car looked good before but looks even better now.
Service was done every 10k miles. Brakes and rotors changed just 2 months ago and brake fluid flushed a year ago. Just need to get the 100k mile service done next week and that'll be it.
Very happy with the purchase.
Full service history and CarFax. Non Airmatic and non Dynamic Curve. Bought it "as is." No problems worth mentioning in the history. Runs great and everything works.
Had to put a new set of tires on it, repair some minor wheel rash on a couple of wheels and replace the windshield because it was severely pitted by road debris. Also added a full set of WeatherTech mats, MB valve stem caps, and new license plate frames and screw caps. Front passenger side mudflap was torn. Cut the dangling part off and cut off the driver's side front mudflap to match. The car looked good before but looks even better now.
Service was done every 10k miles. Brakes and rotors changed just 2 months ago and brake fluid flushed a year ago. Just need to get the 100k mile service done next week and that'll be it.
Very happy with the purchase.
Last edited by sgt1372; Apr 23, 2017 at 03:34 AM.
Thread Starter
Member
Joined: Sep 2015
Posts: 139
Likes: 16
From: Detroit area
2015 S550 Coupe; 2025 EQS 450 SUV
Just bought a 2012 ML350 4Matic w/98k miles on it for $22.5k.
Full service history and CarFax. Non Airmatic and non Dynamic Curve. Bought it "as is." No problems worth mentioning in the history. Runs great and everything works.
Had to put a new set of tires on it, repair some minor wheel rash on a couple of wheels and replace the windshield because it was severely pitted by road debris. Also added a full set of WeatherTech mats, MB valve stem caps, and new license plate frames and screw caps. Front passenger side mudflap was torn. Cut the dangling part off and cut off the driver's side front mudflap to match. The car kooked good before but looks even better now.
Service was done every 10k miles. Brakes and rotors changed just 2 months ago and brake fluid flushed a year ago. Just need to get the 100k mile service done next week and that'll be it.
Very happy with the purchase.
Full service history and CarFax. Non Airmatic and non Dynamic Curve. Bought it "as is." No problems worth mentioning in the history. Runs great and everything works.
Had to put a new set of tires on it, repair some minor wheel rash on a couple of wheels and replace the windshield because it was severely pitted by road debris. Also added a full set of WeatherTech mats, MB valve stem caps, and new license plate frames and screw caps. Front passenger side mudflap was torn. Cut the dangling part off and cut off the driver's side front mudflap to match. The car kooked good before but looks even better now.
Service was done every 10k miles. Brakes and rotors changed just 2 months ago and brake fluid flushed a year ago. Just need to get the 100k mile service done next week and that'll be it.
Very happy with the purchase.
I ended up staying away from Airmatic, btw. From this forum, I was under the impression that it was a common option, but my service advisor told me they never see any MLs with Airmatic (and there's a ton of MLs around here). He wasn't sure if it was a cost-effective option without a warranty.
Thanks for your feedback, guys!
Out Of Control!!
Joined: Sep 2018
Posts: 14,666
Likes: 4,568
From: unbegrenzt
2017 GLE350 4MATIC
How are the W166 folks doing? What are some latest mileage numbers? I have a GLE 350, while not an ML it's on the W166 chassis. I have 50k miles now, hoping to get 200k.
A 200k+ mile ML350 is listed for sale on Cargurus. Has anyone else achieved 200k?
A 200k+ mile ML350 is listed for sale on Cargurus. Has anyone else achieved 200k?
Junior Member
Joined: Sep 2019
Posts: 41
Likes: 8
2012 ML350
My 2012 with 120K miles main issue was knock at start up. Check valve and replacing chain tensioner didn't fix the issue. Cam shaft adjuster is the next probable cause which shops are asking around 4K to fix it. I believe this issue was fixed with the 2014 models and up. Other than that, no other major issues here. Most comfortable ride I owned so far.
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Senior Member
Joined: Apr 2012
Posts: 356
Likes: 66
2012 ML350 Bluetec, 2015 GL350 Bluetec
In terms of reliability it doesn't make too much difference between years.
I would suggest buying 2013+ instead of 2012 due to the NTG version. The 2012 uses NTG4.0 and 2013+ uses NTG4.5 or 4.7 which makes a pretty huge difference. I have a 2012 NTG4.0 and a 2015 GL350 NTG4.5/4.7 and I used to have a 2013 C300 with NTG4.5. Although functions are the same, the 4.5/4.7 respond much faster and have a better color tone (I feel). When I engage reverse, the 4.0 takes 1-2 seconds to switch while 4.5/4.7 switches immediately.
I would suggest buying 2013+ instead of 2012 due to the NTG version. The 2012 uses NTG4.0 and 2013+ uses NTG4.5 or 4.7 which makes a pretty huge difference. I have a 2012 NTG4.0 and a 2015 GL350 NTG4.5/4.7 and I used to have a 2013 C300 with NTG4.5. Although functions are the same, the 4.5/4.7 respond much faster and have a better color tone (I feel). When I engage reverse, the 4.0 takes 1-2 seconds to switch while 4.5/4.7 switches immediately.
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Super Member
Joined: Apr 2016
Posts: 889
Likes: 148
From: Southern Illinois
, 2023 BMW X4, 1991 190E
Have ove 67,000 on 2015 ML 350 still have original brakes and battery. So far so good.
Member
Joined: Jun 2012
Posts: 80
Likes: 6
From: Perth Australia
2013 ML 350 Bluetec
I purchased a 2013 Bluetec with 75,000 Kms, I now have 120,000 Km. My first service was $7000 for split CV boot, split turbo boost line, and Adblue heater element failure. My sunroof has Alzheimer’s, if I open it it does not seem to remember how to close and lifts the rear to tilt, I have had it reset to closed but it needs a control unit which they tell me is expensive so am living without it. Just (2 weeks ago) had another service and it required another turbo boost line ($750) as I had an oil leak and the other side had split, rear damper needs replacing but advised to do in pairs $4400 in parts, I have ordered Aisin dampers for $1000, should be here in Nov. I also needed new rotors F and R $4000 from MB, I bought Zimmerman (sport package) rotors and Akebono pads, fitted the rears today hope to fit fronts tomorrow but am concerned about the AEB system isolation have not been able to find how to an isolation so the pistons are not pressurised but cost was $1650. I am in two minds about the value proposition of a vehicle of this calibre I have to say I love it, but will these cost continue or have I done most of the issues now? As a retiree in my case at least, funds are not endless. If I dump it I won’t get another quality vehicle for the money I get from it. Hope this helps.........
Out Of Control!!
Joined: Sep 2018
Posts: 14,666
Likes: 4,568
From: unbegrenzt
2017 GLE350 4MATIC
I purchased a 2013 Bluetec with 75,000 Kms, I now have 120,000 Km. My first service was $7000 for split CV boot, split turbo boost line, and Adblue heater element failure. My sunroof has Alzheimer’s, if I open it it does not seem to remember how to close and lifts the rear to tilt, I have had it reset to closed but it needs a control unit which they tell me is expensive so am living without it. Just (2 weeks ago) had another service and it required another turbo boost line ($750) as I had an oil leak and the other side had split, rear damper needs replacing but advised to do in pairs $4400 in parts, I have ordered Aisin dampers for $1000, should be here in Nov. I also needed new rotors F and R $4000 from MB, I bought Zimmerman (sport package) rotors and Akebono pads, fitted the rears today hope to fit fronts tomorrow but am concerned about the AEB system isolation have not been able to find how to an isolation so the pistons are not pressurised but cost was $1650. I am in two minds about the value proposition of a vehicle of this calibre I have to say I love it, but will these cost continue or have I done most of the issues now? As a retiree in my case at least, funds are not endless. If I dump it I won’t get another quality vehicle for the money I get from it. Hope this helps.........
It sounds like with the dampers and brakes you may have let them go awhile? Is that correct? Best practice is to stay on top of replaceable items such as those and the vehicle will provide reasonably long service.
Did/do you have water damage to the moonroof?
Member
Joined: Jun 2012
Posts: 80
Likes: 6
From: Perth Australia
2013 ML 350 Bluetec
Hi Chassis, I have followed the MB service schedule and always used the dealership to maintain the vehicle. The brakes are normal wear and tear I just was not prepared to pay the costs when I have the capability to do the job myself, my only concern is how to disable the AEB system for the front brakes in case the pistons are activated while I am replacing pads. After I purchased the vehicle I had initial repairs that I believe the owner knew about, my error was not having MB do a pre purchase inspection..... I was genuinely surprised on both turbo pipes splitting and indicates a weakness in design/materials in my opinion, the CV boot is again a wear and tear issue and could happen to anyone. Sunroof is a failure of the control module (weakness?) and is expensive so I choose to leave it closed. The adblue heater was a $4000 repair but after some discussion MB replaced at their cost maybe it is a known issue? This is my third MB and appears to have had more issues, maybe coincidence.
Member
Joined: Jan 2014
Posts: 236
Likes: 30
From: Florida
2013 ML350 Bluetec, 2016 C3, 2020 Lincoln Aviator
Hi Chassis, I have followed the MB service schedule and always used the dealership to maintain the vehicle. The brakes are normal wear and tear I just was not prepared to pay the costs when I have the capability to do the job myself, my only concern is how to disable the AEB system for the front brakes in case the pistons are activated while I am replacing pads. After I purchased the vehicle I had initial repairs that I believe the owner knew about, my error was not having MB do a pre purchase inspection..... I was genuinely surprised on both turbo pipes splitting and indicates a weakness in design/materials in my opinion, the CV boot is again a wear and tear issue and could happen to anyone. Sunroof is a failure of the control module (weakness?) and is expensive so I choose to leave it closed. The adblue heater was a $4000 repair but after some discussion MB replaced at their cost maybe it is a known issue? This is my third MB and appears to have had more issues, maybe coincidence.
Junior Member
Joined: Nov 2020
Posts: 23
Likes: 6
ML350
Are your turbo boost line those rubber hose feed air in the engine or they are the steel one from exhaust to the turbo? If they are the steel one, turbo blade may already damaged.
Mine turbo air charge hose after intercooler splited. It cost around $300 from ebay. Good thing is it is easy to change.
Mine turbo air charge hose after intercooler splited. It cost around $300 from ebay. Good thing is it is easy to change.
Newbie
Joined: Jan 2020
Posts: 8
Likes: 3
ML 550
Currently at 91K on my 13' ML 550. It was sitting at 75k in March, but I've been taking my family out on little getaways a bit more this year. Car has been reliable and I do hope to get at least 150-200k miles out of the M278.
Out Of Control!!
Joined: Sep 2018
Posts: 14,666
Likes: 4,568
From: unbegrenzt
2017 GLE350 4MATIC
Just turned 60k miles a couple of days ago. So far so good. Some small oil leaks that don't seem to be getting worse. When the weather warms up I will give the vehicle a very close inspection.
I will schedule the 60k transmission oil change in a week or so. I will likely do the 60k engine oil change myself.
What mileages are people accumulating on their W166s?
I will schedule the 60k transmission oil change in a week or so. I will likely do the 60k engine oil change myself.
What mileages are people accumulating on their W166s?
MBWorld Fanatic!
Joined: Jan 2009
Posts: 3,829
Likes: 592
From: NY & FL
MB’s of all kinds.
We only did about 4,000 miles this year on our ML. Total miles under 40,000 miles on the clock. No issues and nothing out of the ordinary for a SUV when it comes to maintenance. Stay clear of the BT and go gas.
Newbie
Joined: Jul 2018
Posts: 14
Likes: 2
From: rhode island
ml350 2015
Just came from dealership for Ignition coil replacement#3 and they recommended transmission oil front and rear differential oil change. My Mb 2015 ml350 (gas) got 46,160 on it . lost my schedule maintenance booklet Too early for trans and diff. change?
Out Of Control!!
Joined: Sep 2018
Posts: 14,666
Likes: 4,568
From: unbegrenzt
2017 GLE350 4MATIC
However, I believe in changing all fluids to achieve high mileage, regardless whether or not the manufacturer specifies it. 46k miles is early. Too early? It's up to you. I have 62k miles on my 2017 W166 and plan to change all of the drivetrain fluids this year. Mainly because I like to do it, but also to help with high mileage achievement (hopefully). I have never had a differential or transfer case problem with any vehicle I have owned. I have run several vehicles well beyond 200k miles. In the big picture, the differentials have very low risk for problems below 200k miles. The transfer case seems to have less design margin and therefore preventive maintenance seems prudent for it.
MBWorld Fanatic!
Joined: Oct 2009
Posts: 6,987
Likes: 2,187
From: Colorado
'21 AMG53 wDPP & ARC, 19 GLC300 - Former-03 C240,2 ML BlueTecs,20 GLE450 E-ABC,15 Cayenne D,17 Macan
89,000 miles on our W164 Bluetec (as I recall), 103,000 on our W166 Bluetec. Adblue heater at 65,000 miles - warranty.
Rear shocks and link bushings at 80,000 miles - warranty, brake PADS at 88,000 miles (rotors fine).
3rd gear accumulator at 1,500 miles - warranty.
I'm not sure where the "unreliability of diesels, comes from, other than @chassis continual badmouthing them.
My experienced with diesels is that many dealers don't order them for stock, and don't train the mechanics, or only one.
This has been my experience in all diesels I have owned from an '80 Isuzu P'uP (sweet little diesel) to Rabbit to Jetta to Toureg to Cayenne.
Since the technicians don't know them, you can get plenty of badmouthing, but very little substance. This used to be the case when fuel injection came along, then catalytic converters, then turbochargers.... you get the picture.
However, even though I haven't seen any real evidence of high diesel problems, there is always the increased probably that you dealer or shop may not be familiar with them, which could be problematic. Interview the dealer's technician.
Rear shocks and link bushings at 80,000 miles - warranty, brake PADS at 88,000 miles (rotors fine).
3rd gear accumulator at 1,500 miles - warranty.
I'm not sure where the "unreliability of diesels, comes from, other than @chassis continual badmouthing them.
My experienced with diesels is that many dealers don't order them for stock, and don't train the mechanics, or only one.
This has been my experience in all diesels I have owned from an '80 Isuzu P'uP (sweet little diesel) to Rabbit to Jetta to Toureg to Cayenne.
Since the technicians don't know them, you can get plenty of badmouthing, but very little substance. This used to be the case when fuel injection came along, then catalytic converters, then turbochargers.... you get the picture.
However, even though I haven't seen any real evidence of high diesel problems, there is always the increased probably that you dealer or shop may not be familiar with them, which could be problematic. Interview the dealer's technician.
Out Of Control!!
Joined: Sep 2018
Posts: 14,666
Likes: 4,568
From: unbegrenzt
2017 GLE350 4MATIC
89,000 miles on our W164 Bluetec (as I recall), 103,000 on our W166 Bluetec. Adblue heater at 65,000 miles - warranty.
Rear shocks and link bushings at 80,000 miles - warranty, brake PADS at 88,000 miles (rotors fine).
3rd gear accumulator at 1,500 miles - warranty.
I'm not sure where the "unreliability of diesels, comes from, other than @chassis continual badmouthing them.
My experienced with diesels is that many dealers don't order them for stock, and don't train the mechanics, or only one.
This has been my experience in all diesels I have owned from an '80 Isuzu P'uP (sweet little diesel) to Rabbit to Jetta to Toureg to Cayenne.
Since the technicians don't know them, you can get plenty of badmouthing, but very little substance. This used to be the case when fuel injection came along, then catalytic converters, then turbochargers.... you get the picture.
However, even though I haven't seen any real evidence of high diesel problems, there is always the increased probably that you dealer or shop may not be familiar with them, which could be problematic. Interview the dealer's technician.
Rear shocks and link bushings at 80,000 miles - warranty, brake PADS at 88,000 miles (rotors fine).
3rd gear accumulator at 1,500 miles - warranty.
I'm not sure where the "unreliability of diesels, comes from, other than @chassis continual badmouthing them.
My experienced with diesels is that many dealers don't order them for stock, and don't train the mechanics, or only one.
This has been my experience in all diesels I have owned from an '80 Isuzu P'uP (sweet little diesel) to Rabbit to Jetta to Toureg to Cayenne.
Since the technicians don't know them, you can get plenty of badmouthing, but very little substance. This used to be the case when fuel injection came along, then catalytic converters, then turbochargers.... you get the picture.
However, even though I haven't seen any real evidence of high diesel problems, there is always the increased probably that you dealer or shop may not be familiar with them, which could be problematic. Interview the dealer's technician.
Bluetec diesels are rubbish. It’s not me @mikapen it’s the product. I spent $9k out of my own pocket on my TDI Touareg, all diesel related. Turbo, EGR, DPF, nox sensors and more.
Bluetec is so bad that MB just settled a class action on the topic, and they no longer sell diesels in the US. Bad product, stay away.
MBWorld Fanatic!
Joined: Oct 2009
Posts: 6,987
Likes: 2,187
From: Colorado
'21 AMG53 wDPP & ARC, 19 GLC300 - Former-03 C240,2 ML BlueTecs,20 GLE450 E-ABC,15 Cayenne D,17 Macan
Bluetec diesels are rubbish. It’s not me @mikapen it’s the product. I spent $9k out of my own pocket on my TDI Touareg, all diesel related. Turbo, EGR, DPF, nox sensors and more.
Bluetec is so bad that MB just settled a class action on the topic, and they no longer sell diesels in the US. Bad product, stay away.
Bluetec is so bad that MB just settled a class action on the topic, and they no longer sell diesels in the US. Bad product, stay away.
In fact the DEF, SCR and other modern diesel e-controls have been a boon to diesel longevity, and are far superior to the former EGR-heavy, engine-destroying "fixes."
With brand new exhaust parts and a new extended warranty, M-B diesels are quite attractive.
Unless you just don't like diesels - then stay away.
MBWorld Fanatic!
Joined: Aug 2003
Posts: 8,882
Likes: 1,212
From: In my garage
E55, GLS450, GL63, GLE350
Please correct me if I'm wrong but the warranty does not cover oil cooler seals, timing chain failure, or spun bearings caused from recommended oil change intervals that are too long? Just covers the emissions related parts, right? Would have them fix the emissions issues, take the money, and sell for whatever I could get.
MBWorld Fanatic!
Joined: Oct 2009
Posts: 6,987
Likes: 2,187
From: Colorado
'21 AMG53 wDPP & ARC, 19 GLC300 - Former-03 C240,2 ML BlueTecs,20 GLE450 E-ABC,15 Cayenne D,17 Macan
@mikapen What passenger car or SUV examples suggest DEF and SCR are boons to diesel longevity?
So, roughly double the power and longer life. I like it.
