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#BS-2023-MERGLS-6729

2023 Mercedes-Benz GLS 450 4MaticProblems, Recalls & Reliability

Based on reports from 16 owners and 5 recalls for this exact model.

Data updated ·checked October 21, 2026 · NHTSA complaints through October 19, 2026

Complaints
16
Crashes
0
Fires
0
Recalls
5
TSBs
159
✅

Preliminary Verdict

Green Light

Based on 16 complaints, 0 crashes, 0 fires, and 5 recalls.

See full verdict with buy/skip conditions

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Mechanic Inspection Checklist

!Check the BrakesHIGH

4 owners reported brakes issues — failures commonly reported around 11K miles.

!Inspect the EngineMED
Look for symptoms of wear and premature failure
+ 6 more items in full checklistUnlock

30,000-Mile Cost Projection

Best Case

$X,XXX

Most Likely

$X,XXX

Worst Case

$X,XXX

Top cost driver: Brakes (4 reports).

Includes fuel costs, common repairs, and recall riskUnlock

Also in your report

Owner Intelligence

AI-synthesized themes from real complaints

Buyer Lot Checklist

Questions, test drive checks, walk-away triggers

Negotiation Talking Points

Data-backed dollar deductions

Buy / Skip Verdict

Final recommendation with conditions

10 sections total in the full reportUnlock all

Where the complaints fall

Brakes4 (25%)
Engine3 (19%)
Forward Collision Avoidance: Automatic Emergency Braking2 (13%)
Fuel System2 (13%)
Electrical1 (6%)
Forward Collision Avoidance: Adaptive Cruise Control1 (6%)
Lane Departure: Assist1 (6%)
Other1 (6%)

2023 Mercedes-Benz GLS 450 4Matic: Known Issues & Problem Areas

Brakes Issues

Brakes complaints account for 25% of all reports filed for the 2023 Mercedes-Benz GLS 450 4Matic, with 4 owners filing complaints with NHTSA. The median mileage at time of complaint is 11,000 miles, suggesting issues tend to surface around the 11K-mile mark.

Engine Issues

Engine complaints account for 19% of all reports filed for the 2023 Mercedes-Benz GLS 450 4Matic, with 3 owners filing complaints with NHTSA. Owners should pay attention to engine-related symptoms during test drives and pre-purchase inspections.

Forward Collision Avoidance: Automatic Emergency Braking Issues

Forward Collision Avoidance: Automatic Emergency Braking complaints account for 13% of all reports filed for the 2023 Mercedes-Benz GLS 450 4Matic, with 2 owners filing complaints with NHTSA. Owners should pay attention to forward collision avoidance: automatic emergency braking-related symptoms during test drives and pre-purchase inspections.

Fuel System Issues

Fuel System complaints account for 13% of all reports filed for the 2023 Mercedes-Benz GLS 450 4Matic, with 2 owners filing complaints with NHTSA. Owners should pay attention to fuel system-related symptoms during test drives and pre-purchase inspections.

Data sourced from NHTSA owner complaints and community reports. The full report analyzes severity, repair costs, and failure patterns for each category.

Complaint trend by year

7
23
7
24
2
25

Complaints filed with NHTSA by year for the 2023 Mercedes-Benz GLS 450 4Matic. Recent trend: decreasing.

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Repair costs • Negotiation scripts • Mechanic checklist • Buy/skip verdict

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Recall History (5 recalls)

23V178000May 2023

STRUCTURE:BODY

Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2022-2023 GLE350, GLE450, GLE580, GLS450, GLS580, Maybach GLS600, AMG GLE53, AMG GLE63 S, and AMG GLS63 vehicles. The rear door window trim bars may detach from the vehicle while driving.

23V445000Sep 2023

FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP

Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2021-2023 C-Class, E-Class, S-Class, CLS, SL, GT, GLC, GLE, GLS, and G-Class vehicles. Please refer to MBUSA's recall report for specific vehicle details. The fuel pump may shutdown, which can result in a loss of drive power.

23V880000Feb 2024

FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP

Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2021-2024 GLE, GLS, C-Class, E-Class, S-Class, SL, GLC, CLS, AMG GT, and G-Class vehicles. Please refer to MBUSA's recall report for specific vehicle details. The fuel pump may shutdown, causing a loss of drive power.

24V118000Mar 2024

POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE:SOFTWARE

Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2020-2023 GLE 450 and GLS 450 vehicles. The transmission may not fully downshift in certain conditions, causing the engine to stall.

24V207000May 2024

ELECTRICAL SYSTEM:WIRING

Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2023-2024 GLE 350, 2020-2024 GLE 450, 2020-2023 GLS 580, GLE 580, 2019-2023 GLS 450, 2021-2023 Maybach GLS 600, AMG GLS 63, 2021-2024 AMG GLE 53, AMG GLE 53 Coupe, and AMG GLE 63 S vehicles. A 48-Volt ground connection under the passenger seat may not be secured properly, resulting in the ground connection overheating.

Recall severity analysis & seller scripts

The full report rates each recall's severity and gives you scripts for asking the seller about recall completion.

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About this data

NHTSA Complaints

Federal database of owner-filed safety complaints. 16 records for this vehicle.

NHTSA Recalls

Manufacturer-issued safety recalls. 5 recalls found for this vehicle.

Repair Cost Data

Real-world repair costs from owner reports and independent databases.

Last updated (checked October 21, 2026). NHTSA complaints received through October 19, 2026.

Other Mercedes-Benz GLS 450 4Matic Model Years

20262025202420232022
View all Mercedes-Benz GLS 450 4Matic years →

2023 Mercedes-Benz GLS 450 4Matic: Frequently Asked Questions

What is the most common problem with the 2023 Mercedes-Benz GLS 450 4Matic?
The most commonly reported issue with the 2023 Mercedes-Benz GLS 450 4Matic is related to the brakes, with 4 complaints filed with NHTSA.
Is the 2023 Mercedes-Benz GLS 450 4Matic reliable?
The 2023 Mercedes-Benz GLS 450 4Matic has 16 complaints, 0 crash reports, and 0 fire reports filed with NHTSA. The full report analyzes whether these numbers indicate real risk or are proportional to the vehicle’s popularity.
How much does it cost to fix 2023 Mercedes-Benz GLS 450 4Matic problems?
Repair costs vary by issue. The full BumperScan report includes detailed repair cost estimates (low/median/high) for every major issue, plus a 30,000-mile total cost of ownership projection.
Does the 2023 Mercedes-Benz GLS 450 4Matic have any recalls?
Yes, the 2023 Mercedes-Benz GLS 450 4Matic has 5 recalls on record. The full report includes recall severity analysis and scripts for asking the seller about recall completion.
What mileage do Mercedes-Benz GLS 450 4Matic problems start?
Based on 1 complaints with mileage data, the median mileage at time of complaint is 11,000 miles. The highest concentration of reported issues occurs in the 0–30K mile range. The full report breaks down exactly which components fail at each mileage bracket.
When was the 2023 Mercedes-Benz GLS 450 4Matic data last updated?
BumperScan last checked this vehicle against NHTSA on October 21, 2026, covering owner complaints received through October 19, 2026 plus the latest recalls, investigations and technical service bulletins. Its numbers last changed on October 13, 2026.
What’s in the full report?
10 sections of AI analysis: severity-ranked issues, component scores (0-100), 30K-mile cost projection, failure timeline by mileage, recall details with seller scripts, owner sentiment analysis, mechanic checklist, buyer lot checklist, negotiation ammo with dollar figures, and a buy/skip verdict.
How is this different from free NHTSA data?
NHTSA gives you raw complaint text. BumperScan cross-references 2.1M+ complaints with community repair cost data, EPA fuel data, and recall records — then uses AI to synthesize it into actionable advice with dollar figures.
How is this different from Carfax?
Carfax is VIN-specific history ($45/report). BumperScan is model-level reliability intelligence — what problems this car is known for, what they cost, and whether you should buy it. Complementary, not competing.
What if the report isn’t useful?
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10 sections of AI analysis based on 16 owner reports. Know before you buy.

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