Mercedes-Benz GLS Model Year Comparison (2017–2026)

Direct multi-year comparison of verified government safety ratings, fuel economy ranges, recall campaigns, and consumer complaints

Model Year EPA Fuel Economy / Range NHTSA Complaints Safety Recalls Overall NCAP Safety Detailed Reports
2017 Mercedes-Benz GLS 14–19 MPG 41
1 crashes
8 Recalls
2018 Mercedes-Benz GLS 15–19 MPG 22
1 crashes
4 Recalls
2019 Mercedes-Benz GLS 15–18 MPG 27
1 crashes
3 Recalls
2020 Mercedes-Benz GLS 18–21 MPG 38
3 crashes
24 Recalls
2021 Mercedes-Benz GLS 16–21 MPG 37
2 crashes
12 Recalls
2022 Mercedes-Benz GLS 15–20 MPG 15
2 crashes
10 Recalls
2023 Mercedes-Benz GLS 16–20 MPG 10
0 crashes
5 Recalls
2024 Mercedes-Benz GLS 16–21 MPG 0
0 crashes
0 Recalls
2025 Mercedes-Benz GLS 15–21 MPG 0
0 crashes
0 Recalls
2026 Mercedes-Benz GLS 15–21 MPG 0
0 crashes
0 Recalls
Data Attribution & Reporting Context: Older model years have had more time in service and on-road exposure, which naturally correlates with higher cumulative complaint volumes. Complaint totals are raw consumer submissions to NHTSA and are not normalized by annual sales volume or cumulative mileage.

Mercedes-Benz GLS Generations (2017–2026)

Verified U.S.-market generation taxonomy, platform architectures, internal chassis codes, and production lifecycles

2nd Generation / GL Facelift

Production Span: 2017–2019
X166
Lifecycle: Renamed & Refreshed (2017–2019)
U.S. Chassis / Body Codes
X166 (SUV)
Supported Model Years:

3rd Generation

Production Span: 2020–2026
X167 MHA
Lifecycle: Pre-Facelift (2020–2023) / Facelift (2024–2026)
U.S. Chassis / Body Codes
X167 (SUV)
Taxonomy Note: Vehicle generation, platform architectures, and chassis designations are curated from verified OEM technical releases and Wikidata (CC0) for U.S.-certified configurations.

Mercedes-Benz GLS Overview & Data Dimensions

Official government testing and defect surveillance data available on this portal

NHTSA Safety & Crash Tests

Complete 5-Star New Car Assessment Program (NCAP) crash ratings across frontal barrier, side barrier, side pole, and rollover resistance testing for tested drivetrain and configuration variants.

EPA Fuel Economy & Range

Standardized dynamometer laboratory ratings including City, Highway, and Combined MPG, MPGe electric efficiency equivalents, pure EV driving ranges, and annual fuel cost calculations.

Defect Complaints & Recalls

Official defect investigations, component-level complaint distribution, safety hazard descriptions, and manufacturer remedy campaigns monitored directly by NHTSA.

Official US Government Data Provenance

All statistics, ratings, defect reports, and safety recall campaigns on this hub are sourced directly from official United States Federal agency databases:

  • National Highway Traffic Safety Administration (NHTSA): Office of Defects Investigation (ODI) and New Car Assessment Program (NCAP).
  • United States Environmental Protection Agency (EPA): FuelEconomy.gov verified laboratory vehicle testing data.

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