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2021 Mercedes-benz Gls-class
Solid pick. The public record on this car is clean for its age. Inspect it, then negotiate with confidence.
36 owner complaints · 0 recalls · data verified July 14, 2026 · source: NHTSA
Why buy?
Electrical system problems dominate (44% of complaints).
Very few owner complaints for its age and sales volume.
Zero recalls, rare for a car this age.
The math, shown
Full methodology →Complaints filed per year
Fading = early teething worked out. Climbing = problems aging in.
How it crashes
NHTSA’s own crash tests, separate from the reliability score above.
NHTSA crash-tested this model year but didn’t publish an overall star rating for it.
Source: nhtsa.gov/ratings. Star ratings compare vehicles within the same class and size, not across every car on the road.
The road ahead
What breaks on a 2021 Mercedes-benz Gls-class, plotted where owners report it happening.
Also reported (mileage varies): Electrical system (16)
Mileage medians come from owners who mentioned an odometer reading in their NHTSA complaint, a rough guide, not a schedule.
Electrical system
44%16 complaints · 6 in the last 2 years
“System malfunctioned detail: 48v battery malfunction, 12v battery malfunction. Safety concern: I was driving on [XXX] , the battery malfunction warning suddenly pop up…”
Engine
11%4 complaints
“Repeated failures of 48 volt battery system has shut vehicle totally off while under highspeed and in traffic”
Lane Departure
8%3 complaints
“Mercedes has launch a Campaign Nr 2022010001 Campaign Desc: 21P0699002 in which will retrofit augmented reality camera in 1147 vehicle model year 2021-2022 . My car ca…”
Driver assistance
8%3 complaints
“The contact owns a 2021 Mercedes Benz GLS450. The contact stated while driving 75 mph with the cruise control engaged, the vehicle decelerated to 45 mph than to 15 mph…”
Recalls (0)
No recall campaigns on file for this model year.
Before you hand over money
Check the VIN for open recalls
NHTSA’s free lookup shows whether this exact car had its recall remedies completed.
Free NHTSA VIN check ↗Get a pre-purchase inspection
A $150 to $250 independent inspection of this exact 2021 Mercedes-benz GLS-CLASS beats every score on the internet, including ours.
What to ask forNot set on the 2021? See how every Gls-class model year scores →
Cross-shopping? Compare the 2021 Mercedes-benz Gls-class against another car →
What owners say
Real owners of this exact model-year, shown separately from the NHTSA score. If they disagree, that’s worth knowing.