Mercedes-Benz GLS 550

Owners filed 14 complaints across 3 model years of the Mercedes-Benz GLS 550. The 2018 drew the most (6); the 2019 the fewest (2).

Model years3

Complaints14

Recalls10

Fires0

Deaths0

Every Mercedes-Benz GLS 550 model year compared

Complaints per year

Year	Complaints	Recalls	Fires	Crashes	Most reported	Status
2019	2	2	—	—	Engine	Routine
2018	6	3	—	—	Unknown or Other	Routine
2017	6	5	—	—	Unknown or Other	Routine

Which Mercedes-Benz GLS 550 years should you avoid?

On raw complaint volume the 2018 is the weakest year on record, with 6 complaints concentrated in the unknown or other. It carries 3 recalls.

Read these numbers with sales volume in mind. A model year that sold in huge numbers naturally accumulates more reports than a rare one, and older cars have had more years to fail. The stronger signal is the severity columns and whether the same component keeps coming up year after year.

Data: NHTSA complaint and recall files, September 2026. Complaints are unverified owner reports.