2017 Mercedes-Benz GLS-Class reliability
NHTSA's file on the 2017 Mercedes-Benz GLS-Class holds 42 complaints after 10 years, a rate of 6 per year. That is more complaints per year than most GLS-Class years here — over the median of the other years, which is 3. NHTSA has no recalls on file for this model year.
42
6
0
10
The complaints owners file most often name Engine (9 of 42), then Electrical system (8) and Exterior lighting (6). Those filings include 1 that reports a crash, 6 that report a fire, and 2 that report an injury.
The 2016 GLS-Class has 0 complaints, 0 per year, and the 2018 has 22 complaints, 3 per year. The 2017 has more complaints per year than the 2016. The 2017 has more complaints per year than the 2018.
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 2017 Mercedes-Benz GLS-Class. How we count. Data as of .
Recalls (0)
No recalls on file with NHTSA for this model year.
Complaints by component (42 total)
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6
2
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Complaints filed per year
Excerpts from recent NHTSA complaint filings
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"On 8/20/2026 I had a vacuum leak from the intake manifold and crankcase hoses repaired at a Vic's Bimmer Shop in the city of Lancaster California. This included the replacement of the oil separator breather on the…"
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"I was driving around and my [XXX] daughter was complaining that the seat was getting super hot . I told her to stop playing with the seat warmer she then replied she was not . I kept driving and then she again told me…"
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"Car did not brake when going about 5-7mph and crashed into another car."
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"The contact owns a 2017 Mercedes-Benz GLS450. The contact heard an abnormal humming sound when the vehicle was started, and the humming sound grew louder over time. The contact believed that the humming sound was coming…"
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"My 2017 Mercedes-Benz GLS 450 is experiencing serious and unpredictable transmission behavior related to the valve body and shifting mechanism. The transmission sometimes fails to engage Park, shifts on its own without…"
NHTSA crash ratings
| Version | Overall | Front | Side | Rollover |
|---|---|---|---|---|
| 2017 Mercedes-Benz GLS-Class SUV 4WD | Not rated | Not rated | Not rated | Not rated |
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
Recall 17V-241 covers certain 2016-2017 GLE and GLS vehicles (and related models) where the electric power-steering connector may be insufficiently sealed against water; moisture can deactivate power assist. The campaign lists 58,323 vehicles across those platforms; dealers replace the connector and inspect the steering rack. Recall 18V-272 also includes certain 2017 GLS350d, GLS450, GLS550, and GLS63 AMG 4Matic vehicles for power-steering reservoir oil-foam leakage among a larger ML/GL population (9,725 vehicles).
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Frequently asked questions
Is the 2017 Mercedes-Benz GLS-Class reliable?
NHTSA's file on the 2017 Mercedes-Benz GLS-Class holds 42 complaints after 10 years, a rate of 6 per year. That is more complaints per year than most GLS-Class years here — over the median of the other years, which is 3. NHTSA has no recalls on file for this model year.
What are common problems with a 2017 Mercedes-Benz GLS-Class?
The complaints owners file most often name Engine (9 of 42), then Electrical system (8) and Exterior lighting (6). Those filings include 1 that reports a crash, 6 that report a fire, and 2 that report an injury.
Is the 2017 Mercedes-Benz GLS-Class more reliable than the years next to it?
The 2016 GLS-Class has 0 complaints, 0 per year, and the 2018 has 22 complaints, 3 per year. The 2017 has more complaints per year than the 2016. The 2017 has more complaints per year than the 2018.
Has the 2017 Mercedes-Benz GLS-Class been recalled?
NHTSA has no recalls on file for the 2017 Mercedes-Benz GLS-Class.
How many complaints have owners filed about the 2017 Mercedes-Benz GLS-Class?
Owners have filed 42 complaints about the 2017 Mercedes-Benz GLS-Class with NHTSA.
What oil does a Mercedes-Benz GLS-Class take?
X166 GLS 450 lists 0W-30/0W-40/5W-30/5W-40 (~7.4 qt); X167 GLS 450 lists 0W-40 or 5W-40 (~9 qt). Verify the MB sheet on the container.
What does recall 24V-118 cover on the GLS?
Certain 2020-2023 GLE 450 and GLS 450 vehicles: the transmission may not fully downshift in certain situations—see the NHTSA campaign for the remedy.
Which GLS generations does this site track?
X166 (2016-2019) and X167 (2020-on).