2015 Mercedes-Benz ML-Class reliability
Owners have filed 66 complaints with NHTSA about the 2015 Mercedes-Benz ML-Class over 12 years — 7 per year. That is the most complaints per year among the 4 ML-Class years on this site. NHTSA has no recalls on file for this model year.
66
7
0
12
The complaints owners file most often name Engine (16 of 66), then Powertrain (8) and Service brakes (7). Those filings include 13 that report a crash, 5 that report an injury, and 1 that reports a death.
The 2014 ML-Class has 74 complaints, 3 per year. The 2015 has more complaints per year than the 2014.
The complaint rate is complaints filed in this year’s first 3 years on the road, divided by however many of those years have passed. Recalls are a separate count. The numbers are for the US-market 2015 Mercedes-Benz ML-Class. How we count. Data as of .
Recalls (0)
No recalls on file with NHTSA for this model year.
Complaints by component (66 total)
Show 14 more Show less
13
0
5
1
Complaints filed per year
Excerpts from recent NHTSA complaint filings
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"The failed/malfunctioning component appears to be the fuel pump controller / fuel pump control unit, and possibly the fuel pump system. The Mercedes-Benz dealer identified water/moisture-related damage and corrosion at…"
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"In July 2025, the sunroof panel had lifes and was flapping at highway speeds. I immediately contacted a Mercedes-Benz dealer to report the hazard. I was told they were unaware of such an issue and that I would have to…"
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"In mid-trip as we were going down the highway went to change lanes and the turn signals were no longer functioning. No errors, no alerts, no warnings they just stopped working. After pulling over and turning off the…"
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"Rear subframe rusted from the inside out causing structural failure. This matches the defect in Campaign #2023020002 for other Mercedes models.""
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"Cam Shaft replacement diagnosed after week and half visit to Mercedes Benz dealership for engine rattling at cold start up. We are left with a $10,000 repair after performing all scheduled maintenance at the Mercedes…"
NHTSA crash ratings
| Version | Overall | Front | Side | Rollover |
|---|---|---|---|---|
| 2015 Mercedes-Benz ML-Class SUV 4WD | 5 stars | 5 stars | 5 stars | 4 stars |
| 2015 Mercedes-Benz ML-Class SUV RWD | 5 stars | 5 stars | 5 stars | 4 stars |
Stars are how this vehicle did in NHTSA crash tests. They are a safety result, separate from the complaint record. Not rated means that test was not run for this version.
Specs and fitment
Known issues for this generation
NHTSA complaints on 2012-2015 Mercedes-Benz ML-Class (W166) vehicles most often name the engine, followed by fuel/propulsion and powertrain. Confirm open recalls by VIN using the specific ML trim string (for example ML350); some Mercedes campaigns are filed under trim-level model names rather than ML-Class.
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Frequently asked questions
Is the 2015 Mercedes-Benz ML-Class reliable?
Owners have filed 66 complaints with NHTSA about the 2015 Mercedes-Benz ML-Class over 12 years — 7 per year. That is the most complaints per year among the 4 ML-Class years on this site. NHTSA has no recalls on file for this model year.
What are common problems with a 2015 Mercedes-Benz ML-Class?
The complaints owners file most often name Engine (16 of 66), then Powertrain (8) and Service brakes (7). Those filings include 13 that report a crash, 5 that report an injury, and 1 that reports a death.
Is the 2015 Mercedes-Benz ML-Class more reliable than the years next to it?
The 2014 ML-Class has 74 complaints, 3 per year. The 2015 has more complaints per year than the 2014.
Has the 2015 Mercedes-Benz ML-Class been recalled?
NHTSA has no recalls on file for the 2015 Mercedes-Benz ML-Class.
How many complaints have owners filed about the 2015 Mercedes-Benz ML-Class?
Owners have filed 66 complaints about the 2015 Mercedes-Benz ML-Class with NHTSA.
What engine oil does a Mercedes-Benz ML-Class use?
MB-Approval oils such as 0W-40 or 5W-40 are commonly listed for this W166 generation; capacity is about 8.5 qt with filter on typical gasoline fills.
What tire sizes does an ML350 commonly use?
Common OEM packages include 255/50R19 and 265/45R20; confirm the door placard for your wheel option.
What do NHTSA complaints most often name on 2012-2015 ML-Class vehicles?
NHTSA complaints on 2012-2015 ML-Class (W166) vehicles most often name the engine, followed by fuel/propulsion and powertrain; confirm open recalls by VIN.