2018 Mercedes-Benz GLS Specifications Overview
The 2018 Mercedes-Benz GLS is certified across 3 configurations with 3L 6-Cylinder Engine, 4.7L 8-Cylinder Engine, 5.5L 8-Cylinder Engine powertrain options. Available drivetrain layouts include 4-Wheel Drive paired with Automatic 9-spd or Automatic 7-spd. EPA classified under the Standard Sport Utility Vehicle 4WD size category. Platform architecture belongs to the 2nd Generation / GL Facelift (X166) vehicle family.
Certified Powertrain & Transmission Configurations (3)
Official laboratory certification specifications for each factory engine, transmission, and drivetrain permutation
| Configuration / Model | Engine & Displacement | Cylinders | Induction / Tech | Transmission | Drivetrain | Fuel System |
|---|---|---|---|---|---|---|
| GLS450 4matic Standard Sport Utility Vehicle 4WD | 3L 6-Cylinder Engine | 6 | Naturally Aspirated | Automatic 9-spd | 4-Wheel Drive | Premium |
| GLS550 4matic Standard Sport Utility Vehicle 4WD | 4.7L 8-Cylinder Engine | 8 | Naturally Aspirated | Automatic 9-spd | 4-Wheel Drive | Premium |
| AMG GLS63 Standard Sport Utility Vehicle 4WD | 5.5L 8-Cylinder Engine | 8 | Naturally Aspirated | Automatic 7-spd | 4-Wheel Drive | Premium |
Regulatory Classification & Safety Architecture
Federal classification standards and standard active driver assistance system capabilities
EPA Regulatory Size Class
- Standard Sport Utility Vehicle 4WD
NHTSA NCAP Body Formats
Standard passenger body configuration
Active Safety Technology
Evaluated under federal safety compliance standards.
Powertrain, transmission, drivetrain, and regulatory classification specifications on this page are derived directly from the United States Environmental Protection Agency (EPA) and National Highway Traffic Safety Administration (NHTSA) official laboratory certification registries.
Local Production Store Compiled: August 2026 • Deterministic Audited Dataset • Zero Dynamic External API Runtime Latency.