If you are thinking about buying a Mercedes GLS, you are not alone. This luxury SUV is known for its elegant design, powerful performance, and high status. But while the Mercedes GLS is a dream car for many, not every year is a good choice.
Some model years have more problems than others, which can lead to expensive repairs and disappointment. In this article, you will learn which Mercedes GLS years to avoid, why these years have more issues, and how to pick a reliable model.
Whether you are a first-time buyer or an experienced car owner, these insights will help you make a smarter decision.
Why Year Matters When Buying A Used Mercedes Gls
Every car model changes a little each year. Manufacturers fix problems, add new features, or sometimes make mistakes in design or parts. The Mercedes GLS, as a luxury SUV, comes with a lot of advanced technology. While this is exciting, it also means more chances for things to go wrong—especially in the first years after a new generation is launched.
Problems in some GLS years can cost thousands of dollars to repair. Common complaints include engine trouble, air suspension failures, electrical system glitches, and unreliable transmissions. Knowing which years to avoid can save you money and stress.
A Brief History: Mercedes Gls Generations
The Mercedes GLS is the full-size luxury SUV from Mercedes-Benz. It replaced the old GL-Class in 2016 but has roots going back to 2006. Understanding the generations helps you see which years are more likely to have problems.
| Generation | Model Years | Main Updates |
|---|---|---|
| X164 (GL-Class) | 2007–2012 | First full-size SUV from Mercedes, 7 seats |
| X166 (GL/GLS-Class) | 2013–2019 | Facelift, renamed to GLS in 2016, tech improvements |
| X167 (GLS-Class) | 2020–present | Fully redesigned, new engines, more tech |
Older models are called GL-Class, but from 2016 on, they are officially known as GLS. Problems in the early years of each generation are usually more common.
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Mercedes Gls Years To Avoid
Some GLS model years have a higher rate of complaints, recalls, and expensive repairs. Here are the years you should avoid if you want to reduce your risk of trouble:
1. 2013 Mercedes-benz Gl/gls-class
- First year of the X166 generation
- Common problems: Air suspension failure, electrical glitches, engine stalling, and transmission issues
- Owners report frequent visits to the mechanic for check engine lights and electronic problems
- Expensive to repair due to complex systems
2. 2016 Mercedes-benz Gls-class
- First year after the GL-Class was renamed to GLS
- Many issues with new infotainment and electronics
- Reports of faulty air suspension and premature brake wear
- Some buyers experienced major engine trouble within first 50,000 miles
3. 2017 Mercedes-benz Gls-class
- Problems with automatic transmission shifting roughly
- More complaints about power loss and infotainment freezing
- Some owners faced repeated sensor and module replacements
4. 2020 Mercedes-benz Gls-class
- First year of the X167 new generation
- High-tech features caused unexpected electronic issues
- Air suspension failures were still common
- Reports of engine oil leaks, rattling noises, and software bugs
- Expensive to repair because of new technology
5. 2021 Mercedes-benz Gls-class
- Continuing problems from the 2020 redesign
- Some owners had repeated issues with the MBUX infotainment system
- Electric seat and climate controls sometimes failed
- Several recalls for safety system malfunctions
These years saw more complaints and higher repair costs than other GLS years. While every car can have problems, these models stand out for the wrong reasons.
Why These Years Have More Problems
Understanding why certain years are risky can help you spot warning signs. Here are some key reasons:
New Generation Launches
Each time Mercedes launches a new GLS generation, there are new engines, electronics, or suspension parts. These new components are not always fully tested in real-world conditions, leading to more bugs and failures in the first 1-2 years.
Overcomplicated Technology
Luxury SUVs like the GLS are packed with advanced features—from air suspension to touchscreens and driver assist systems. When these systems are new, software and hardware issues are more likely. Even small bugs can cause big headaches, as repairs require special tools and expensive parts.
Supplier And Manufacturing Changes
Mercedes often uses new suppliers or factories when they update a model. Changes in parts quality or assembly can lead to more recalls and reliability issues during the first production years.
Real-world Data
Car reliability organizations and owner reports, such as those from Consumer Reports and NHTSA, show that the years listed above have more complaints per vehicle than average. For example, the 2013 and 2016 GLS have more than double the average number of suspension and electrical complaints compared to later years.
Common Problems In Bad Gls Years
If you buy a Mercedes GLS from one of the riskier years, here are issues you might face:
Air Suspension Failure
The GLS uses AIRMATIC air suspension for a smooth ride. In bad years, these systems fail early, causing the car to sag or ride roughly. Replacing air struts or the compressor can cost $2,000–$5,000.
Electrical System Glitches
Problems with the infotainment screen, backup camera, power seats, or climate control are common. These are often traced to faulty modules or wiring, costing hundreds or thousands to fix.
Transmission Issues
Some GLS models have rough shifting, hesitation, or warning lights from the transmission. In a few cases, the transmission needs a rebuild or replacement, which can cost over $6,000.
Engine Problems
Reports include oil leaks, stalling, and loss of power. Some engines burn oil faster than normal or develop rattling noises. Repairs are expensive, and sometimes the only fix is a full engine rebuild.
Recalls And Safety Risks
Certain GLS years have recalls for airbags, brakes, or seat belts. Safety recalls can be fixed by the dealer, but they signal design or manufacturing problems.
Which Mercedes Gls Years Are More Reliable?
Not every GLS is risky. Some years have much fewer complaints and are known for long-term reliability. If you want a safer bet, consider these years:
- 2014–2015 GL-Class: After the first year issues in 2013, these models are more reliable and have fewer complaints.
- 2018–2019 GLS-Class: By this time, Mercedes fixed many earlier problems. These years have better reliability scores and fewer expensive repairs.
- 2022–Present GLS-Class: Most early bugs from the new generation are fixed. These SUVs have fewer recalls and owner complaints.
Here’s a quick comparison of the best and worst GLS years for reliability:
| Model Year | Reliability Score (1-5) | Common Problems |
|---|---|---|
| 2013 | 2 | Suspension, electrical, engine |
| 2015 | 4 | Minor electronics |
| 2017 | 2.5 | Transmission, infotainment |
| 2019 | 4.5 | Few issues |
| 2020 | 2 | Electronics, suspension |
| 2022 | 4.5 | Minor bugs |
Hidden Issues Beginners Often Miss
Some Mercedes GLS problems are not obvious during a short test drive. Here are two insights many buyers overlook:
- Delayed Electronics Failure: Many electrical issues only show up after a few weeks or months. The infotainment, backup camera, or seat controls might work fine at first but fail after regular use. This makes pre-purchase inspections less effective unless the mechanic checks every feature carefully.
- Air Suspension Leak Detection: Small leaks in the air suspension system can be hard to spot at first. The SUV may sit level while parked, but overnight it sags on one side or rides rough on bumpy roads. It’s smart to inspect the car after it has been parked for several hours.
What To Check Before Buying A Used Mercedes Gls
If you want to avoid the costly mistakes other buyers made, follow these steps before you buy:
Get A Full Service History
A well-maintained GLS is much less likely to have major issues. Ask for all maintenance records and check if the car had regular oil changes, air suspension service, and software updates.
Inspect For Recalls
Search the VIN on the NHTSA recall website to see if the car has any open recalls. Make sure all recall work is completed before you buy.
Pay For A Pre-purchase Inspection
A Mercedes specialist can spot hidden issues with the air suspension, electronics, and transmission. The inspection may cost $200–$400, but it can save you thousands.
Test All Electronics
Sit in the car and try every button—climate, seats, windows, infotainment, backup camera, and driver assists. Any glitch should be a red flag.
Watch For Warning Lights
If any warning lights stay on after starting the engine, walk away. Modern GLS models have complex systems, and warning lights often mean expensive problems.
How Much Will Repairs Cost?
The Mercedes GLS is not a cheap SUV to own. Here’s a look at average repair costs for common issues:
| Repair Type | Average Cost (USD) |
|---|---|
| Air suspension replacement | $2,000–$5,000 |
| Transmission repair/replacement | $4,000–$7,000 |
| Engine repair | $3,000–$8,000 |
| Infotainment system fix | $800–$2,500 |
| General maintenance (annual) | $1,000–$2,000 |
These high costs show why it is so important to avoid risky GLS years.
Tips For Buying A Used Mercedes Gls
The right approach can make owning a GLS a pleasure, not a problem. Here’s how to reduce your risk:
- Choose a later model year (2018, 2019, or 2022+ if possible). These are less likely to have major issues.
- Buy certified pre-owned (CPO) from a Mercedes dealer. CPO cars come with a warranty, which protects you from big repair bills.
- Avoid the first year of a new generation. These models are more likely to have design or software bugs.
- Negotiate for an extended warranty. Even if the car is out of factory warranty, a third-party policy can save you money.
- Read owner forums and reviews for real-world experiences. Other buyers can warn you about problems that don’t show up in ads.
What If You Already Own A Risky Gls Year?
If you already own a GLS from a higher-risk year, don’t panic. Here’s what you can do:
- Stay on top of maintenance. Follow the service schedule closely, and don’t skip oil changes or air suspension checks.
- Fix problems early. Small issues can get worse (and more expensive) if you ignore them.
- Check for software updates. Mercedes often releases updates that fix bugs in electronics and infotainment systems.
- Join a GLS owner community. Online forums are a great place to find solutions and advice from other owners.
- Consider selling if repair costs become too high. Sometimes trading in for a newer, more reliable model is the best financial choice.
How To Spot A Well-maintained Gls
A GLS that’s been cared for will last much longer with fewer problems. Look for these signs:
- Complete service records with Mercedes stamps
- No warning lights on the dashboard
- All electronics and features work smoothly
- Air suspension sits level after parking overnight
- Tires have even wear
- No strange engine noises, leaks, or burning smells
Why Some Owners Love Their Gls Despite Problems
Even in riskier years, some owners are very happy with their Mercedes GLS. The reason is that the GLS offers a unique combination of comfort, power, and luxury. When problems do happen, some people are willing to pay for repairs because they love the experience of driving a GLS.
But if you are not prepared for higher costs or downtime, it’s better to choose a more reliable year or a different SUV.
Alternatives To The Mercedes Gls
If you are worried about reliability, you might consider other full-size luxury SUVs. Here are a few popular options:
- BMW X7: Similar size and features, but slightly fewer complaints in early years.
- Audi Q7/Q8: Known for strong reliability in recent years, but smaller third row.
- Lexus LX 570: Excellent reliability, though less advanced technology than GLS.
- Cadillac Escalade: American luxury, more affordable to maintain but not as refined.
Each option has pros and cons, so compare carefully based on your needs.
Should You Buy An Older Gls?
Some buyers look for a bargain by choosing an older GLS, such as a 2010–2012 GL-Class. These SUVs can be very affordable, but remember that repair costs do not drop as the car gets older. In fact, parts become harder to find and some repairs get more expensive.
Only buy an older GLS if you have access to a good independent mechanic who knows Mercedes SUVs.
How Does The Gls Compare To Other Mercedes Suvs?
The GLS is the largest and most luxurious SUV Mercedes makes. Compared to the smaller GLE or GLC, it offers more space and features but also higher repair costs and more complex systems. If you don’t need the third row or extra cargo space, the GLE can be a safer, more affordable choice.
Credit: www.consumerreports.org
The Bottom Line
Buying a used Mercedes GLS can be rewarding, but only if you choose the right year. Avoiding the first year of a new generation and watching out for high-tech bugs will save you money and trouble. Always get a full inspection, check service records, and consider an extended warranty.
If you pick a well-maintained, reliable year, the GLS can be a comfortable and stylish family SUV for years to come.
For more information about Mercedes reliability, you can check out Consumer Reports.
Frequently Asked Questions
Which Mercedes Gls Year Has The Most Complaints?
The 2020 GLS has the most complaints among recent models, especially about electronic issues, air suspension failures, and engine oil leaks. The 2013 and 2016 models also have high rates of owner dissatisfaction.
How Long Does A Mercedes Gls Usually Last?
With proper maintenance, a GLS can last 150,000 to 200,000 miles or more. However, expensive repairs are more likely after 100,000 miles, especially for air suspension and electronics.
Is It Expensive To Maintain A Mercedes Gls?
Yes, the GLS is one of the more expensive SUVs to own. Annual maintenance can cost $1,500 or more, and major repairs for air suspension or the engine can run several thousand dollars.
Are There Any Gls Years With Few Problems?
The 2015, 2018, 2019, and 2022+ GLS models are known for fewer problems and higher owner satisfaction. These years have better reliability ratings and fewer costly repairs.
What Is The Biggest Problem With The Mercedes Gls?
The biggest and most expensive problem is air suspension failure. When the air struts or compressor break, repairs can cost $2,000–$5,000. Electronic issues are also common in bad years.
With the right research and careful inspection, you can enjoy the luxury of a Mercedes GLS without regret. Make sure to avoid the risky years and invest in maintenance for the best experience.
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