Most common 2018 Mercedes-Benz GLS550 problems
Share of the 6 complaints; one complaint can involve more than one system. "~" is the median mileage when the problem started.
Mercedes-Benz GLS550 complaints by model year
Best GLS550 years: 2019. Compare all years →
2018 Mercedes-Benz GLS550 recalls (3)
Communication › Auto crash notification
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2016 - 2021 CLA-Class, GLA-Class, GLE-Class, GLS-Class, SLC-Class, A-Class, GT-Class, C-Class, E-Class, S-Class, CLS-Class, SL-Class, B-Class, GLB-Class, GLC-Class, and G-Class vehicles. Please refer to the Part 573 report for specific vehicle model details.
Remedy: MBUSA will notify owners, and the communication module software will be updated by a dealer, or through an over-the-air (OTA) update, free of charge. The recall began March 12, 2021.
Service brakes, hydraulic
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2018 Mercedes-Benz GLE350 4Matic, GLE350, GLS450 4Matic, GLS550 4matic, GLE43 AMG 4Matic, GLE63 AMG 4Matic, GLE63S AMG 4Matic, and GLS63 AMG 4Matic vehicles.
Remedy: MBUSA will notify owners, and dealers will bleed the rear axle brake system, free of charge. The recall began September 14, 2018. Owners may contact MBUSA customer service at 1-800-367-6372.
Latches/locks/linkages › Doors › Latch
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2017 GLE400 4Matic, GLE350 4Matic, GLE350, GLE550e 4Matic, GLE43 AMG 4Matic, GLE63 AMG 4Matic, GLS450, GLE63S 4Matic, GLS63 4Matic, S550e, S600, S63 AMG 4Matic, S65 AMG, S550, Mercedes-Maybach S600, Mercedes-Maybach S550 4Matic, GLE43 AMG 4Matic Coupe, GLE63S 4Matic Coupe,…
Remedy: MBUSA will notify owners, and dealers will inspect the left rear door lock, replacing it as necessary, free of charge. The recall is expected to begin in January 2018.
2018 Mercedes-Benz GLS550 engines & fuel economy
| Engine | Transmission | Drive | MPG city / hwy / combined |
|---|---|---|---|
| 4.7L 8-cyl turbo | 9-speed automatic | 4WD | 14 / 19 / 16 |
EPA ratings. Class: SUV.
Frequently asked questions
Is the 2018 Mercedes-Benz GLS550 a good car?
That is a low number of complaints for a car on sale this long. So far owners have filed 6 complaints with NHTSA.
What is the most common problem with the 2018 Mercedes-Benz GLS550?
The transmission & drivetrain — 1 complaint, 17% of all complaints for this model year. Next are the electrical system (1) and seat belts (1).
How many recalls does the 2018 Mercedes-Benz GLS550 have?
There are 3 recalls for the 2018 Mercedes-Benz GLS550, the most recent from February 5, 2021 (auto crash notification). Recall repairs are free at any authorized dealer — check whether yours has been done with the VIN recall check.
What are the best and worst years of the Mercedes-Benz GLS550?
The best years by complaints, compared at the same age, are 2019. See the full Mercedes-Benz GLS550 years comparison.
At what mileage do 2018 Mercedes-Benz GLS550 problems happen?
The median mileage reported in complaints is about 7,000 miles; 80% of problems with a recorded mileage started before 50,000 miles.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.