2018 Mercedes-Benz GLS 450

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2018 Mercedes-Benz GLS 450
RENDERED 2026-09-17T02:56:57.292Z

Only 14 complaints on file — too few for a fair verdict.

This verdict reflects complaint volume compared to this model's typical year. Recalls and safety issues below apply regardless of the verdict — always check them.

Only 14 complaints on file — too few for a fair verdict. The data below is complete but unranked.

How is this computed?

COMPLAINTS PER YEAR

2018: 14 complaints

View as data table

Year	Complaints
2018	14
2019	19
2020	35
2022	14
2023	7
2024	14

KNOWN PROBLEM AREAS

Only 14 complaints on file for this model year -- too few to rank by share. Raw counts only, below.

SUSPENSION

3 of 14 total reports mention: suspension.

SERVICE BRAKES

3 of 14 total reports mention: service brakes.

CRASH FIRE

Show complaint excerpts

January 2023 - Airbag suspension failed. Replaced by Mercedes dealership. December 2024 - Airbag suspension failed. Replaced by Mercedes dealership. April 2024: First brake failure. The brakes stopped while driving. Repaired.

NHTSA ODI report, 20251205

Also filed under ENGINE and FORWARD COLLISION AVOIDANCE

I WAS ALREADY 90% IN PARKING LINE WHICH IS HANDICAP'S.

NHTSA ODI report, 20200908

STRUCTURE

2 of 14 total reports mention: structure, most commonly citing body.

ENGINE

2 of 14 total reports mention: engine.

FIRE

Show complaint excerpts

The contact owned a 2018 Mercedes Benz GLS450. The contact stated that after turning the ignition switch off, the driver suddenly discovered flames were coming from the engine compartment.

NHTSA ODI report, 20211014

ELECTRICAL SYSTEM

2 of 14 total reports mention: electrical system, most commonly citing front underhood.

FIRE

Show complaint excerpts

TL* THE CONTACT OWNS A 2018 MERCEDES-BENZ GLS450. WHILE DRIVING 70 MPH, THE VEHICLE LOST POWER AND ALL THE WARNING INDICATORS ON THE INSTRUMENT PANEL ILLUMINATED. ALSO, WHEN THE BRAKE PEDAL WAS DEPRESSED, THE VEHICLE FAILED TO STOP.

NHTSA ODI report, 20180807

SAFETY TIMELINE

R 20180914 — 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. MBUSA's number for this recall is 2018080013.

Campaign 18V539000 — check if this car was fixed

R 20210312 — communication, electrical system

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.

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. Owners may contact MBUSA customer service at 1-877-762-8267.

Campaign 21V058000 — check if this car was fixed

R 20220708 — communication, electrical system

Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2017-2022 CLA-Class, GLA-Class, GLE-Class, GLS-Class, SLC-Class, A-Class, AMG GT-Class, C-Class, E-Class, S-Class, SL-Class, GLC-Class, CLS-Class, GLB-Class, and G-Class vehicles.

Remedy: The communication module software will be updated through an Over-the-Air (OTA) update or by a dealer, free of charge. Owner notification letters were mailed July 8, 2022.

Campaign 22V365000 — check if this car was fixed

BUY-SMART CHECKLIST

2018 Mercedes-Benz GLS 450 — pre-purchase inspection

Test/inspect for suspension issues (3 reports on file for this year).
Test/inspect for service brakes issues (3 reports on file for this year).
Test/inspect for structure issues (2 reports on file for this year).
Verify recall 18V539000 (service brakes, hydraulic) has been completed.
Verify recall 21V058000 (communication, electrical system) has been completed.
Verify recall 22V365000 (communication, electrical system) has been completed.

FAQ

Is the 2018 Mercedes-Benz GLS 450 reliable?

There isn't enough NHTSA complaint data on file yet to give this model year a verdict.

What are the most common problems with the 2018 Mercedes-Benz GLS 450?

The most-reported component is suspension, accounting for 21% of complaints on file.

How many recalls does the 2018 Mercedes-Benz GLS 450 have?

3 recalls on file for this model year.

Data updated 2026-09-16 · Complaints are unverified owner reports filed with NHTSA, not independently verified defects. Methodology.