2023 Mercedes-Benz GLS-Class reliability
NHTSA's file on the 2023 Mercedes-Benz GLS-Class holds 10 complaints after 4 years, a rate of 3 per year. GLS-Class years here cluster close together — the other years’ median is 3 complaints per year. NHTSA has no recalls on file for this model year.
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The complaints owners file most often name Engine (4 of 10), then Service brakes (4) and Electrical system (2). The most filings arrived in 2024 (4 of 10).
The 2022 GLS-Class has 16 complaints, 3 per year, and the 2024 has 0 complaints, 0 per year. The 2023 has about the same number of complaints per year as the 2022. The 2023 has more complaints per year than the 2024.
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 2023 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 (10 total)
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Complaints filed per year
Excerpts from recent NHTSA complaint filings
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"AT 0730 on 16 March, 2026 I was traveling northbound on XXX in [XXX] . Temp was 55 degress Farenheight and the wind was in excess of 20 knots. I was going 60 MPH. Suddenly a large "gun shot" sound echoed through the car…"
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"The car recently underwent a software update at the dealership for a backup camera issue. When I was driving home on the highway, the car suddenly braked and the seat belts automatically tightened up. This happened 3…"
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"Rear door window trim on driver's side detached from vehicle while traveling at highway speed."
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"There have been 3 incidents where the car responded to unknown stimuli by braking hard. 3 months ago it happened while making a left turn through an intersection, driving about 10 mph the brakes unexpectedly locked up,…"
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"when coming to a stop and applying the break, the transmission stalled. a warning was issued around lane keeping assist and a second warning. Then the transmission light was on. It was not at risk in the moment because…"
NHTSA crash ratings
| Version | Overall | Front | Side | Rollover |
|---|---|---|---|---|
| 2023 Mercedes-Benz GLS-Class SUV AWD | 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 24V-118 covers certain 2020-2023 GLE 450 and GLS 450 vehicles: the transmission may not fully downshift in certain conditions, causing the engine to stall. The campaign lists 105,071 vehicles across those models; dealers update the transmission control-unit software. Recall 23V-178 covers certain 2022-2023 GLS450, GLS580, Maybach GLS600, and related GLE/AMG models: rear door window trim bars may detach (70,225 vehicles). Dealers inspect and secure the trim bars.
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Frequently asked questions
Is the 2023 Mercedes-Benz GLS-Class reliable?
NHTSA's file on the 2023 Mercedes-Benz GLS-Class holds 10 complaints after 4 years, a rate of 3 per year. GLS-Class years here cluster close together — the other years’ median is 3 complaints per year. NHTSA has no recalls on file for this model year.
What are common problems with a 2023 Mercedes-Benz GLS-Class?
The complaints owners file most often name Engine (4 of 10), then Service brakes (4) and Electrical system (2). The most filings arrived in 2024 (4 of 10).
Is the 2023 Mercedes-Benz GLS-Class more reliable than the years next to it?
The 2022 GLS-Class has 16 complaints, 3 per year, and the 2024 has 0 complaints, 0 per year. The 2023 has about the same number of complaints per year as the 2022. The 2023 has more complaints per year than the 2024.
Has the 2023 Mercedes-Benz GLS-Class been recalled?
NHTSA has no recalls on file for the 2023 Mercedes-Benz GLS-Class.
How many complaints have owners filed about the 2023 Mercedes-Benz GLS-Class?
Owners have filed 10 complaints about the 2023 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).