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2021 Mercedes-Benz

GLS450 4matic

Auto 9-spd, 6 cyl, 3.0 L, Turbo

Mercedes-Benz GLS450: best and worst years

Overview

Body
Standard Sport Utility Vehicle 4WDEPA, from EPA, last updated 6/11/2026
Drivetrain
4-Wheel DriveEPA, from EPA, last updated 6/11/2026
Transmission
Automatic 9-spdEPA, from EPA, last updated 6/11/2026
Powertrain
HybridEPA, from EPA, last updated 6/11/2026
Fuel
PremiumEPA, from EPA, last updated 6/11/2026

Engine & performance

Cyl
6EPA, from EPA, last updated 6/11/2026
Aspiration
TurbochargedEPA, from EPA, last updated 6/11/2026
Start-stop system
YesEPA, from EPA, last updated 6/11/2026

Efficiency

MPG Hwy
24 mpgEPA, from EPA, last updated 6/11/2026
MPG City
20 mpgEPA, from EPA, last updated 6/11/2026
MPG Comb
21 mpgEPA, from EPA, last updated 6/11/2026
Fuel $/yr
$3,650EPA, from EPA, last updated 6/11/2026
CO₂
414 g/miEPA, from EPA, last updated 6/11/2026
Eco Score
4/10EPA, from EPA, last updated 6/11/2026
Smog score
6/10
Elec. Range
0 miEPA, from EPA, last updated 6/11/2026
Real-world MPG
22.2 mpg, reported by 1 driverabout 1.2 mpg above the EPA combined estimate
SmartWay certified
No

Safety NHTSA, model year

Recalls
0
Owner complaints
0

Feature availability

Which features come standard, cost extra, or are locked to a pricier trim arrives with the next data phase. Standard equipment shows here today.

Standard

Warranty manufacturer terms, by make

Basic
4 yr / 50k mi
Powertrain
4 yr / 50k mi
Roadside assistance
4 yr / 50k mi
EV battery
10 yr / 155k mi

Information is gathered on a best-effort basis from public sources, may be incomplete or out of date, and is not purchasing or financial advice. Verify with the manufacturer or dealer before buying.