Makes / Mercedes-Benz / GLS-Class
Mercedes-Benz Repair • Phoenix, AZ
Mercedes-Benz GLS-Class Repair in Phoenix, AZ
Common problems, safety recalls and expert service for the Mercedes-Benz GLS-Class (2017 to 2023).
EZ Swap LLC services the Mercedes-Benz GLS-Class in Phoenix, AZ, covering model years 2017 to 2023. If your GLS-Class has a warning light, a strange noise or a safety recall question, our mechanics can diagnose it and give you a clear quote first.
To help GLS-Class owners know what to watch for, we reviewed public records from the National Highway Traffic Safety Administration (NHTSA). For these model years NHTSA has 195 owner complaints on file for the GLS-Class and 0 safety recall campaigns. The most-reported problem areas are electrical system (55), engine (36), forward collision avoidance (19).
Most-Reported Mercedes-Benz GLS-Class Problems
These problem areas come up most often in NHTSA owner complaints for the GLS-Class (all model years combined). Complaint counts reflect reports filed, not the share of vehicles affected, so popular and older models naturally have more.
| Problem area (NHTSA component) | Complaints | Share | |
|---|---|---|---|
| Electrical System | 55 | 28% | |
| Engine | 36 | 18% | |
| Forward Collision Avoidance | 19 | 9% | |
| Fuel/Propulsion System | 18 | 9% | |
| Power Train | 18 | 9% | |
| Service Brakes | 15 | 7% | |
| Suspension | 14 | 7% | |
| Structure | 10 | 5% |
Electrical System
55 of the 195 complaints (28%) mention the electrical system. Electrical problems are made worse by desert heat, which ages batteries, cables and connectors. We test the battery, starter and charging system and trace faults to the actual part. See our battery replacement and starter & alternator repair pages.
Engine
36 of the 195 complaints (18%) mention the engine and cooling system. Engine and cooling complaints are best caught early in Phoenix, where heat pushes cooling systems and engine oil to their limits. We diagnose warning lights and check coolant, hoses and oil condition. See our check engine light diagnostics and oil change & maintenance pages.
Forward Collision Avoidance
19 of the 195 complaints (9%) mention driver-assistance and stability systems. Driver-assistance and stability systems rely on sensors and software. We scan for stored codes and diagnose sensor and wiring faults. See our check engine light diagnostics page.
Mercedes-Benz GLS-Class Complaints by Model Year
The GLS-Class model years with the most NHTSA complaints on file are 2017, 2020, 2021. Older model years have had more time to collect reports, so use this table as a guide for what to inspect, not as a verdict on any one vehicle.
| Model year | Complaints on file | |
|---|---|---|
| 2017 | 42 | |
| 2018 | 22 | |
| 2019 | 28 | |
| 2020 | 38 | |
| 2021 | 38 | |
| 2022 | 17 | |
| 2023 | 10 |
Most Common Mercedes-Benz GLS-Class Check Engine Codes
Owners often put the exact trouble code in their NHTSA complaint. These are the codes cited most often for the GLS-Class. The most-cited is P06DA (powertrain code), mentioned in 2 complaints. Counts reflect complaints that name a code, not every car on the road.
| Code | What it means | Complaints citing it |
|---|---|---|
| P06DA | Powertrain code A scan and test is needed to confirm what this code means for your vehicle. | 2 |
A code is a clue, not a diagnosis. The same code can have several causes, so we test before replacing parts. See our check engine light diagnostics, and read whether it is safe to drive with the check engine light on.
Serious Incident Reports
Of the NHTSA complaints on file for the GLS-Class, 10 involved a crash, 15 involved a fire, 10 reported injuries. These numbers are drawn from self-reported complaints and are not verified findings. If your vehicle has an open recall, get it repaired promptly.
Keeping a Mercedes-Benz GLS-Class Reliable in Phoenix
Arizona heat is the hardest test a Mercedes-Benz will face. Batteries, belts, hoses, tires and engine oil all wear faster here, and a GLS-Class that spends its life in stop-and-go Valley traffic needs maintenance earlier than the owner's manual's normal schedule suggests.
Our recommendation for GLS-Class owners: follow the severe-service schedule, test the battery before every summer, inspect brakes and tires twice a year, and have any warning light diagnosed instead of ignored. If you are shopping for a used Mercedes-Benz GLS-Class, a pre-purchase inspection shows what the paperwork does not.
Mercedes-Benz GLS-Class Services at EZ Swap LLC
Get the details on our Phoenix Mercedes-Benz GLS-Class repair service, or choose a service below.
Battery Replacement
Test, replace and protect against Phoenix heat.
Details →Starter & Alternator Repair
Charging and starting system repair.
Details →Check Engine Light Diagnostics
Scan, test and pinpoint the real cause.
Details →Oil Change & Maintenance
Oil, filters, fluids, tires and scheduled service.
Details →Mercedes-Benz GLS-Class FAQ
What are the most common problems with the Mercedes-Benz GLS-Class?
Based on NHTSA owner complaints, the most-reported problem areas for the Mercedes-Benz GLS-Class are electrical system (55), engine (36), forward collision avoidance (19). Complaint counts reflect reports filed, not the share of vehicles affected.
Which GLS-Class model years have the most complaints?
The GLS-Class model years with the most NHTSA complaints on file are 2017, 2020, 2021. Older years have had longer to collect reports, so inspect any specific vehicle before buying.
What are the most common check engine codes on the Mercedes-Benz GLS-Class?
In NHTSA owner complaints for the Mercedes-Benz GLS-Class, the codes cited most often are P06DA (powertrain code). A code points to a system, and testing confirms the actual failed part.
Does the Mercedes-Benz GLS-Class have any safety recalls?
NHTSA lists 0 recall campaigns for the Mercedes-Benz GLS-Class across model years 2017 to 2023. Each recall applies only to certain vehicles, so enter your VIN at nhtsa.gov/recalls to see if yours is affected.
Do you repair the Mercedes-Benz GLS-Class in Phoenix?
Yes. EZ Swap LLC repairs and maintains Mercedes-Benz vehicles including the GLS-Class, at 9050 N 9th St in Phoenix. Call or text (602) 246-9063 for an appointment.
Is a pre-purchase inspection worth it for a used Mercedes-Benz GLS-Class?
Yes. An inspection checks the engine, transmission, brakes, suspension, A/C and electrical system, and scans for stored codes, so you know the real condition before you buy.
How often should I service my Mercedes-Benz GLS-Class in Phoenix?
Follow the severe-service schedule in your owner's manual, since heat and stop-and-go driving count as severe use. Test the battery before summer and inspect brakes and tires regularly.
More Mercedes-Benz Models We Service
Source: public complaint and recall records from the National Highway Traffic Safety Administration (nhtsa.gov). Counts reflect reports filed and do not predict the condition of any individual vehicle.