What is the Mercedes-Benz GL-Class?
The Mercedes-Benz GL-Class is a full-size, premium seven-seat luxury SUV that was produced from 2006 to 2016. It represents Mercedes-Benz’s flagship entry in the large SUV segment, competing directly against the Cadillac Escalade, Lexus LX, and Lincoln Navigator. The GL-Class was notable for being built on a unibody platform rather than a truck-style body-on-frame chassis — giving it a significant handling advantage over rivals.
In 2016, Mercedes-Benz renamed the GL-Class to the GLS-Class, aligning it with the broader Mercedes SUV naming strategy. Despite the name change, the GLS continued on the same platform before a full redesign in 2020.
Definition: Mercedes-Benz GL-Class
The GL-Class is a full-size luxury three-row SUV manufactured by Mercedes-Benz. GL stands for “Grand Luxury.” It was produced across two generations: X164 (2007–2012) and X166 (2013–2016), before being renamed the GLS-Class. It seats up to 7 passengers and is powered by multiple engine options including V6, V8, and AMG-tuned variants.
Key Generations at a Glance
✅ Best Years for Mercedes-Benz GL
Based on NHTSA data, consumer complaints, reliability ratings, and owner reviews, the best years for the Mercedes-Benz GL-Class are 2016, 2015, 2014, and 2009. These model years stand out for their improved reliability, lower complaint numbers, refined technology, and better long-term durability.
Quick Answer: Best Years to Buy
2016, 2015, 2014 are the top recommended years. The 2009 is the best pick from the first generation. If budget allows, always aim for a 2015 or 2016 GL450 for maximum reliability and the most modern feature set.
GL450 / GL550 — Final & Finest
The last model year before the GLS rebrand. Features the updated turbocharged V6 engine, lowest complaint count of any GL year, and the most modern interior and technology.
GL450 — Turbocharged Efficiency
Shares the turbocharged 3.0L V6 producing 362 hp and 369 lb-ft of torque, improved fuel efficiency, and far fewer mechanical complaints than any prior year.
GL450 — Second Gen Mature
Second year of the X166 generation. By 2014, major first-year teething issues had been resolved. Fewer recalls than 2013, better cabin refinement and updated safety tech.
GL450 — First-Gen Sweet Spot
After the rocky 2007–2008 debut years, Mercedes refined many issues by 2009. It’s the most reliable first-generation pick, with significantly fewer complaints than earlier X164 models.
Why Are 2015 and 2016 the Best GL Years?
The 2015 and 2016 GL450 models made a critical switch from the older naturally-aspirated V8 engine to a more modern 3.0-litre twin-turbocharged V6. This new engine delivers 362 horsepower and 369 lb-ft of torque through a smooth 7-speed automatic transmission. Not only is it more powerful in real-world driving conditions, it is also noticeably more fuel-efficient. Combined with the resolution of Takata airbag issues affecting earlier years, these final GL models represent the peak of the GL-Class evolution.
❌ Worst Years for Mercedes-Benz GL
The worst years for the Mercedes-Benz GL-Class are 2007, 2008, 2010, 2011, 2012, and 2013. These model years are plagued by a combination of early-build quality issues, the widespread Takata airbag recall, air suspension failures, and significant electrical problems that make them costly to own.
Warning: Years to Avoid
The 2007 model has the highest recorded complaint count of any GL year. The 2010, 2011, and 2012 models were severely affected by the Takata airbag recall — one of the largest automotive recalls in history. The 2013 model suffers from first-year X166 generation teething problems.
GL450 — Most Complaints Recorded
The debut year recorded the highest number of owner complaints — over 161 total problems reported. Electrical system failures, air suspension faults, premature transmission issues, and fuel system problems dominated owner feedback.
GL450 — Fuel & Electrical Issues
Fuel system problems, ongoing electrical failures, and transmission concerns carried over from the 2007 model. Owners reported high maintenance costs making this a risky used buy.
GL450 — Dangerous Airbag Recall
Part of the massive Takata airbag recall. Airbags were found to deploy unexpectedly and dangerously, with remedies delayed by several years. Not recommended even at a steep discount.
GL450 — Airbag + Suspension
Continues the Takata airbag recall crisis alongside air suspension failures. Repair delays were extensive and costly, leaving many owners in a difficult position.
GL450 — Last Takata-Affected Year
The final X164 year and still subject to the Takata recall. Some improvement over earlier years, but the airbag risk combined with aging platform reliability makes this a year to skip.
GL450 — First-Year X166 Problems
First year of the second generation X166. Timing chain issues with the M278 V8, cylinder scoring in colder climates, and first-year teething problems put this year on the avoid list.
Why Is the 2007 Mercedes-Benz GL the Worst Year?
The 2007 Mercedes-Benz GL-Class is the worst year primarily because it was a debut model year — the first time Mercedes-Benz offered a proper 7-seat full-size luxury SUV in the US market. Debut years historically carry more production-line issues, and the GL450 was no different. With over 161 documented problems reported by owners, it tops the list for total complaints across all GL years. Issues ranged from electrical failures and fuel system faults to suspension problems and powertrain concerns.
📊 Year-by-Year Quick Reference
Use this summary table for a fast at-a-glance comparison of every Mercedes-Benz GL model year from 2007 to 2016, with verdict and key issues.
| Model Year | Generation | Engine | Key Issue(s) | Verdict |
|---|---|---|---|---|
| 2007 | X164 (1st Gen) | 4.7L V8 | Electrical, Suspension, Fuel System | ❌ Avoid |
| 2008 | X164 (1st Gen) | 4.7L V8 | Fuel System, Electrical, Transmission | ❌ Avoid |
| 2009 | X164 (1st Gen) | 4.7L V8 | Air Suspension (minor) | ✅ Best Gen 1 |
| 2010 | X164 (1st Gen) | 4.7L V8 | Takata Airbag Recall | ❌ Avoid |
| 2011 | X164 (1st Gen) | 4.7L V8 | Takata Airbag, Air Suspension | ❌ Avoid |
| 2012 | X164 (1st Gen) | 4.7L V8 | Takata Airbag Recall | ❌ Avoid |
| 2013 | X166 (2nd Gen) | 4.7L V8 Biturbo | Timing Chain, Cylinder Scoring | ⚠️ Caution |
| 2014 | X166 (2nd Gen) | 4.7L V8 Biturbo | Minor issues, fewer complaints | ✅ Recommended |
| 2015 | X166 (2nd Gen) | 3.0L V6 Turbo | Minimal reported issues | ✅ Top Pick |
| 2016 | X166 (2nd Gen) | 3.0L V6 Turbo | Almost none | ✅ Best Year |
📅 Mercedes-Benz GL Model Year Timeline
🔧 Most Common Problems with the Mercedes-Benz GL
Understanding the most frequently reported issues helps you inspect a used Mercedes-Benz GL intelligently and budget for potential repairs. Here are the top problems across all GL-Class model years:
🚨 Takata Airbag Recall (2010–2012)
The single biggest safety issue. The Takata airbag inflators were defective and could rupture violently upon deployment. This nationwide recall affected over 67 million vehicles worldwide including the GL450. Repair delays stretched for years. Always verify the recall has been remedied before purchasing any 2010–2012 GL.
🔩 Air Suspension Failure
The GL-Class uses a AIRMATIC air suspension system which is notorious for compressor failures, leaking air struts, and faulty ride height sensors. Replacement can cost $1,500–$4,000+ per corner. This is the second most common complaint across all GL years, particularly in the X164 generation.
⚙️ Timing Chain Issues (2013–2014)
The M278 V8 biturbo engine used in the X166 2013–2014 models was prone to timing chain rattle on cold start. This is caused by weak timing chain tensioners, confirmed by Mercedes Technical Service Bulletin LI05.10-P-056435. Left unresolved, it can lead to serious engine damage.
🔌 Electrical System Failures
Electrical gremlins are a recurring theme across the X164 generation (2007–2012). Symptoms include random warning lights, COMAND infotainment freezes, power seat malfunctions, sunroof failures, and unexpected module failures. Diagnosis and repair can be expensive due to the complexity of Mercedes’ CANBUS systems.
🛢️ Oil Leaks (2013–2016)
The X166 generation is susceptible to oil leaks from the oil pan gasket, valve cover gasket, and oil filter housing gasket. The 2012–2013 model years show the highest susceptibility. Timing cover leaks also occur in second-generation models, often requiring complete resealing due to factory sealant failures.
🔊 Engine Cylinder Scoring
Particularly in cold climates, the M278 V8 in 2013–2014 models can develop cylinder scoring — scratches on the cylinder walls due to inadequate lubrication during cold starts. Minor scoring doesn’t typically affect drivability, but severe cases may require engine rebuild work.
🛡️ Is the Mercedes-Benz GL Safe?
Safety is a top concern for families considering the Mercedes-Benz GL-Class. Here is what the data says:
NHTSA Safety Ratings (Overall)
The GL-Class generally earned 4–5 star ratings from NHTSA across most categories. However, the Takata airbag recall on 2010–2012 models represents a serious, life-threatening safety concern that must be verified as repaired before purchase. Always run the VIN through NHTSA’s recall database at nhtsa.gov.
Standard Safety Features (2013–2016 GL)
The second-generation X166 GL-Class came equipped with a comprehensive suite of safety technology that was best-in-class for its era:
- ✦ Pre-Safe® System — Prepares occupants for imminent collision by tensioning seatbelts and closing windows
- ✦ Blind Spot Monitoring — Alerts driver to vehicles in blind spots
- ✦ Lane-Keeping Assist — Warns driver of unintentional lane departure
- ✦ Attention Assist — Detects driver drowsiness and issues alerts
- ✦ 9 Airbags — Front, side, curtain, and knee airbags (post-recall)
- ✦ 4MATIC All-Wheel Drive — Permanent AWD for enhanced stability
- ✦ Electronic Stability Program (ESP®) — Prevents loss of control in adverse conditions
Critical Safety Warning: Takata Airbag Recall
If considering a 2010, 2011, or 2012 GL-Class, it is absolutely essential to verify the Takata airbag recall has been completed. The inflators in these vehicles can rupture with explosive force, sending metal shrapnel into the cabin. Multiple fatalities have been attributed to this defect globally. Do not purchase any unresolved recall vehicle.
👍 Advantages of the Mercedes-Benz GL-Class
The Mercedes-Benz GL-Class offers a compelling package for families and luxury SUV buyers. Here are the key advantages that make it stand out:
🛋️ Flagship Luxury Interior
Buttery soft Nappa leather, real wood trim, panoramic sunroof, massaging seats, and Mercedes’ acclaimed COMAND infotainment system make every journey feel premium.
🚘 Unibody Ride Quality
Unlike truck-based rivals, the GL’s car-derived unibody platform delivers a significantly smoother, more composed ride and sharper handling — a rare trait in a 3-row SUV.
👨👩👧👦 Generous 7-Seat Capacity
All three rows offer generous headroom and legroom. The GL seats 7 adults in comfort — the third row is genuinely usable for adults, unlike many competitors.
🏔️ Off-Road Capability
With 4MATIC AWD, selectable low-range transfer case, adjustable air suspension, and hill descent control, the GL is a genuine off-road performer rarely associated with luxury SUVs.
💪 Strong Towing Capacity
The GL-Class can tow up to 7,500 lbs (3,400 kg), making it highly capable for towing boats, trailers, and horse boxes — unusual for a luxury unibody SUV.
🔋 Engine Variety
Available in GL320 CDI (diesel), GL350 BlueTEC, GL450 (V8/V6T), GL550 (V8), and GL63 AMG — one of the widest engine choices in the segment.
👎 Disadvantages of the Mercedes-Benz GL-Class
While the GL-Class offers much, it is not without its drawbacks. Understanding these before purchase helps set realistic ownership expectations:
✅ Key Advantages
- Class-leading interior luxury
- Smooth unibody ride and handling
- 7-seat capacity with real adult space in all rows
- Strong off-road capability
- 7,500 lb towing capacity
- Wide engine and variant selection
- Strong resale value (well-maintained)
- Prestigious brand image
❌ Key Disadvantages
- Above-average maintenance costs
- Expensive air suspension repairs
- Takata recall risk on 2010–2012 models
- Complex electronics = expensive diagnostics
- Timing chain issues on 2013–2014 V8
- Poor fuel economy on V8 models
- High insurance costs
- Large exterior size for city driving
What Does it Cost to Maintain a Mercedes-Benz GL?
Annual maintenance for the Mercedes-Benz GL averages $1,100–$1,800 per year — considerably higher than the class average of ~$650. Major repairs like air suspension replacement ($2,000–$5,000), timing chain repairs ($1,500–$3,000), or transmission service ($600–$1,200) can significantly increase total ownership cost. A pre-purchase inspection by a Mercedes-certified technician is highly recommended.
🛒 How to Buy a Used Mercedes-Benz GL
Buying a used Mercedes-Benz GL-Class smart requires more than just test-driving. Follow these steps to protect your investment:
🎯 Choose the Right Year
Start with the 2015 or 2016 GL450 as your target. If budget is a constraint, the 2014 GL450 is the next best pick. Avoid 2007–2008 and 2010–2012 entirely unless you have confirmed recall remediation documents.
📋 Run the VIN
Use the NHTSA portal (nhtsa.gov) to check for open recalls. Run a CarFax or AutoCheck report to verify accident history, ownership history, and service records. Never skip this step on a luxury SUV.
🔍 Pre-Purchase Inspection
Book an independent pre-purchase inspection (PPI) at a Mercedes-certified shop. Specifically ask them to check: air suspension integrity, timing chain condition, oil leaks, airbag system status, and all electronic modules.
💰 Budget for Ownership Costs
Set aside a maintenance reserve of $2,000–$3,000 per year for ownership of an older GL-Class. Air suspension compressors, tire replacements (large run-flat tires are expensive), and routine service are the biggest recurring costs.
🏷️ Fair Pricing Check
Cross-reference the asking price against KBB, Edmunds, and local dealer listings. A well-maintained 2015 GL450 is worth significantly more than a higher-mileage 2011 GL450 with unresolved recalls — don’t let low sticker price on a bad year tempt you.
📝 Negotiate Based on Findings
Use any findings from the PPI as negotiating leverage. Known issues like a failing air suspension compressor or pending maintenance items should be reflected in the sale price or remedied before purchase.
🔄 GL vs GLS: What’s the Difference?
One of the most common questions among buyers is: what is the difference between the Mercedes-Benz GL and GLS?
The short answer: the 2016 GL-Class and the 2016 GLS are the same vehicle — Mercedes simply renamed it mid-year. The real generational leap came with the 2020 GLS redesign, which introduced a completely new platform, 48-volt mild hybrid technology, and the E-Active Body Control suspension.
🚙 Types and Variants of the Mercedes-Benz GL
The GL-Class was offered in several distinct variants during its production run, each targeting a different buyer:
Diesel Economy Variant
3.0L V6 turbodiesel. Excellent fuel economy for a large SUV. Available in European markets and some US markets. Strong low-end torque, lower running costs.
Clean Diesel
Mercedes’ BlueTEC clean diesel technology reduces NOx emissions. Popular in Europe. Combines torque and economy in a large luxury SUV package.
The Sweet Spot
The most popular variant. 4.7L V8 (2007–2014) or 3.0L V6 Turbo (2015–2016). Perfect balance of performance, luxury, and ownership cost. The recommended buy in any year.
Performance SUV
5.5L biturbo V8, 429 hp. More power, sportier feel, higher fuel costs. Prone to more cylinder scoring in cold climates. Best for buyers wanting maximum performance.
Full Performance Beast
AMG-tuned 5.5L biturbo V8 producing up to 557 hp. Unique AMG styling, lowered suspension tuning, upgraded brakes. A 7-seat supercar-SUV that is thrilling but expensive to maintain.
🔩 Maintenance Costs & Ownership Tips
Owning a Mercedes-Benz GL-Class is rewarding but requires a commitment to proper maintenance. Here is what to expect:
| Service Item | Typical Cost (USD) | Frequency |
|---|---|---|
| Oil Service (Synthetic) | $180–$280 | Every 10,000 miles |
| Brake Pads + Rotors | $600–$1,200 | Every 30,000–50,000 miles |
| Air Suspension Compressor | $800–$1,500 | Every 80,000–100,000 miles |
| Air Strut (per corner) | $1,000–$1,800 | As needed (failure-based) |
| Timing Chain Service | $1,500–$3,500 | If rattle noted at startup |
| Transmission Service | $400–$800 | Every 40,000 miles |
| Spark Plugs (V8) | $400–$600 | Every 40,000 miles |
| Tire Set (Run-Flat 20″) | $1,200–$2,000 | Every 25,000–40,000 miles |
| Battery Replacement | $350–$600 | Every 5–7 years |
Pro Tip: How to Reduce GL Ownership Costs
Use an independent Mercedes-specialist shop rather than the main dealer for out-of-warranty service — typical savings of 30–50% on labour costs. Always use genuine Mercedes-Benz or OEM-equivalent parts for air suspension components, as cheap aftermarket struts often fail prematurely on the GL’s heavier chassis.
🏆 Top Recommendation
For the best Mercedes-Benz GL ownership experience, buy a 2015 or 2016 GL450. These final model years represent the pinnacle of the GL-Class — refined engines, the best reliability ratings, and the most modern technology before the GLS rebrand. Always conduct a full pre-purchase inspection and verify all recalls are cleared.
❓ Frequently Asked Questions — Mercedes-Benz GL
Here are the most commonly asked questions about the Mercedes-Benz GL best and worst years:
