Looking to buy an ML350/550 - Need advice!!!!
As my family is growing I am looking at trading in my C400 for an ML350 or 550.
I will be giving this car to my wife who will be using it as a family hauler and I will DD a cheaper car.
Can everyone give me some insight on reliability, years to avoid, issues, recalls, things to know etc...
Also, how reliable are the Bluetec's? Should I look for a 550 or be happy with the 350?
Thanks in advanced!
The W166 platform seems generally reliable.
As with any preowned vehicle, buy the newest and lowest mile sample your budget will tolerate.




ML's might be getting long of tooth. Here's a link to our local dealer's site with CPO GLEs. You can see the original equipment sticker and the Carfax. With your wife being the primary driver, the CPO benefits and service loaners might be worth the piece of mind. Not many dealers offer access to the sticker, but every dealer can provide it if you ask them.
https://www.mbotw.com/used-vehicles/...%5D=GLE&page=1
I am looking to see if there are any major issues or recalls/unresolved problems with the car, maybe certain MY's to avoid.
2012, 63,000k's and $50,000 Aussie Dollars (same worth as yours).
My car is quite high spec as Aussie cars are highly specced.
The only problem I have had is the tailgate strut failed and I replaced it myself.
The wheels on the car were pretty battered and new tyres lasted less than 10,000k's until it was wheel aligned and it is now going well.
I have put 20,000k's on it and enjoy driving it.
My wife uses it in preference to her SLK55 as she doesn't care if anyone hurts my car!
I'd buy another.
As my family is growing I am looking at trading in my C400 for an ML350 or 550.
I will be giving this car to my wife who will be using it as a family hauler and I will DD a cheaper car.
Can everyone give me some insight on reliability, years to avoid, issues, recalls, things to know etc...
Also, how reliable are the Bluetec's? Should I look for a 550 or be happy with the 350?
Thanks in advanced!
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If you really want some power then the ML550 is the one. 2014 was the last year of production, but maintenance cost will be higher. You can still find them CPO. Check this link below. You can search any specific model at Mercedes dealer that are CPOed
https://www.mbusa.com/en/vehicles/cpo/inventory
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I have a 2014 ML350 gas 4matic. Has been very reliable for the past 45,000 miles. 90,000 miles on it now. Stick with the gas ML's 2014 and 2015. Do not get airmatic. Do get the lighting package (HID's) and Harmon Kardon stereo. Those are must have options. I average 19-21 mpg mixed city and highway.
I cannot attest to the performance of the ML 350 V6 or V8 as I am diesel fan.
Good luck in your search.
Only when he pulled ahead did I see the 350 Blutec sign.
Those diesels sure are quick but I'd never have one.
Don't like standing in a diesel puddle to fill it up and the dirty bowser handle are enough to stop me.
Yes, that diesel handle is oily at the pump. That's a small price to pay for the time between fill ups.
The diesel rocks and it's quieter under acceleration than the gas alternative.
My wife doesn't drive very often as she is a stay at home. When she does drive, its to the grocery stores and the doctor appointments. etc.... As a family hauler we will be using it every other weekend for long trips to the cottage for sure.
Are there known issues with the Oil cooler seals, timing chain and swirl flaps in the intake? if so, are these big problems or something I should be aware of?
I am currently looking at a 2014 ML350 Bluetec and a 2013 ML350 Bluetec - will check them out this weekend.
My wife doesn't drive very often as she is a stay at home. When she does drive, its to the grocery stores and the doctor appointments. etc.... As a family hauler we will be using it every other weekend for long trips to the cottage for sure.
Are there known issues with the Oil cooler seals, timing chain and swirl flaps in the intake? if so, are these big problems or something I should be aware of?
I am currently looking at a 2014 ML350 Bluetec and a 2013 ML350 Bluetec - will check them out this weekend.
I just had the Oil Cooler Seals replaced on my 2014 ML 350 Bluetec did not know they were even leaking, so I cannot confirm if the dealer was lying or not, the repairs were covered by extended warranty. No issues so far with the timing chain. The swirl flaps were replaced at the same time the Oil Cooler Seals were replaced.
I went to see both 350 bluetecs yesterday and they were beautiful! We did not pull the trigger though as clearly the diesel isnt the right option for us. Thanks again for all the help and replies.
We are now waiting to find a 350 gas or 550.
I went to see both 350 bluetecs yesterday and they were beautiful! We did not pull the trigger though as clearly the diesel isnt the right option for us. Thanks again for all the help and replies.
We are now waiting to find a 350 gas or 550.




Sure, airmatics ride better. But the stock spring setup in the ML is comfortable enough for me and more than capable for the wife. And when it comes time to replace the shocks, you can get all 4 OEM for under $1,000 that won't leak and leave your ride slammed to the ground as opposed to $1400 each with air shocks.
The OP seems to be looking for best value, a comfortable and reliable ride for his wife to haul their family. A stock gas non air ML is the best choice for reliability with a "premium ride".




