Mercedes GL-Class 2017 Highway Mileage: Perfect Performance
The 2017 Mercedes-Benz GL-Class offers impressive highway mileage, typically achieving around 19-20 MPG on the highway, ensuring a balance of luxury performance and fuel efficiency for your journeys.
Ah, the open road! There’s nothing quite like gliding along in a Mercedes-Benz, is there? If you own a 2017 Mercedes-Benz GL-Class, or are considering one, you’re likely curious about its highway fuel economy. Understanding this can help you plan road trips, manage your fuel budget, and truly appreciate the engineering behind this magnificent machine. Many owners wonder, “How far can my GL-Class take me on a tank of gas, especially on longer stretches?” It’s a valid question, and one we’re here to answer clearly. Let’s dive into the specifics of the 2017 GL-Class and its impressive highway performance.
Understanding the 2017 Mercedes-Benz GL-Class: A Closer Look
The 2017 Mercedes-Benz GL-Class, a full-size luxury SUV, was known for its spacious interior, robust performance, and premium features. For this model year, it offered a choice of powerful yet refined engines, each designed to deliver a distinct driving experience. The GL-Class sits at the pinnacle of Mercedes-Benz’s SUV lineup, offering three-row seating, advanced technology, and the exceptional comfort expected from the tri-star brand. Its imposing presence on the road is matched by its sophisticated engineering, making it a popular choice for families and individuals who demand both capability and luxury. Let’s break down the powertrains to see how they influence highway mileage.
Engine Options and Their Impact on Fuel Economy
The 2017 GL-Class was available in a few different configurations, primarily distinguished by their engines. These engines are the heart of the vehicle’s performance and significantly influence its fuel efficiency, especially on the highway where engines often operate at more consistent speeds and lower RPMs.
1. GL 350d 4MATIC (Diesel Engine)
The GL 350d featured a 3.0-liter V6 turbodiesel engine. Diesel engines are inherently known for their torque and fuel efficiency, particularly on the highway. This powertrain is often the most fuel-efficient option within the GL-Class lineup.
- Horsepower: Approximately 240 hp
- Torque: Around 455 lb-ft
- Transmission: 7G-TRONIC 7-speed automatic
- Drivetrain: 4MATIC All-Wheel Drive
2. GL 450 4MATIC (Gasoline Engine)
The GL 450 was equipped with a 3.0-liter biturbo V6 gasoline engine. This option provides a smoother, quieter acceleration compared to the diesel, appealing to those who prioritize refined power delivery.
- Horsepower: Approximately 362 hp
- Torque: Around 406 lb-ft
- Transmission: 7G-TRONIC 7-speed automatic
- Drivetrain: 4MATIC All-Wheel Drive
3. GL 550 4MATIC (Gasoline Engine)
For those seeking more potent performance, the GL 550 came with a larger 4.6-liter biturbo V8 gasoline engine. This engine offers substantial power and torque, which naturally comes with a trade-off in fuel economy.
- Horsepower: Approximately 449 hp
- Torque: Around 516 lb-ft
- Transmission: 7G-TRONIC 7-speed automatic
- Drivetrain: 4MATIC All-Wheel Drive
2017 Mercedes-Benz GL-Class Highway Mileage: The Numbers
When it comes to highway mileage, the 2017 GL-Class offers respectable figures, especially considering its size and luxury appointments. These numbers are EPA estimates and can vary based on driving habits, road conditions, and vehicle maintenance.
| Model | Engine | EPA Estimated City MPG | EPA Estimated Highway MPG | EPA Estimated Combined MPG |
|---|---|---|---|---|
| GL 350d 4MATIC | 3.0L V6 Turbodiesel | 19 MPG | 23 MPG | 21 MPG |
| GL 450 4MATIC | 3.0L Biturbo V6 Gasoline | 17 MPG | 21 MPG | 18 MPG |
| GL 550 4MATIC | 4.6L Biturbo V8 Gasoline | 13 MPG | 17 MPG | 14 MPG |
As you can see, the GL 350d 4MATIC, with its diesel engine, leads the pack in highway fuel efficiency. The gasoline-powered GL 450 offers a good balance of power and mileage, while the more performance-oriented GL 550, boasting the V8 engine, naturally consumes more fuel.
Factors Affecting Real-World Highway Mileage
While EPA estimates provide a benchmark, your actual highway mileage can differ. Several factors play a significant role:
- Driving Style: Aggressive acceleration and hard braking will reduce fuel economy. Smooth, consistent driving at highway speeds is key.
- Speed: Fuel efficiency generally decreases significantly as speed increases beyond 55-60 mph.
- Vehicle Load: Carrying a heavy load (passengers and cargo) increases the vehicle’s weight, requiring more energy to move and thus reducing mileage.
- Tire Pressure: Underinflated tires increase rolling resistance, leading to lower MPG. Regular checks are essential. Visit NHTSA’s tire safety guidelines for proper maintenance.
- Aerodynamics: Roof racks, open windows at high speeds, or towing can create drag and negatively impact mileage.
- Terrain and Weather: Driving uphill requires more fuel. Strong headwinds can also decrease highway MPG.
- Maintenance: A well-maintained vehicle with clean filters, proper fluid levels, and correctly functioning engine components will perform more efficiently.
Maximizing Your GL-Class Highway Mileage
Even with the inherent efficiency of your GL-Class, there are several practical steps you can take to maximize your highway mileage. These tips are easy to implement and can make a noticeable difference over long distances.
Tips for Better Fuel Efficiency
- Maintain Consistent Speed: Use cruise control whenever possible on the highway. This helps maintain a steady speed, which is more fuel-efficient than constant fluctuations.
- Proper Tire Inflation: Regularly check your tire pressure and ensure it’s set to the manufacturer’s recommended levels. You can find this information on a sticker in the driver’s side doorjamb or in your owner’s manual.
- Reduce Idling: While less common on highways, avoid unnecessary idling if you’re stopped for extended periods.
- Lighten the Load: Remove any unnecessary weight from your GL-Class before a long trip. Every extra pound requires more fuel to move.
- Smart Driving Habits: Accelerate gently and brake smoothly. Anticipate traffic flow to avoid abrupt stops.
- Aerodynamic Considerations: Stow away roof racks or cargo carriers when not in use. At highway speeds, keeping windows closed and using the climate control is generally more efficient than open windows.
- Regular Maintenance: Ensure your GL-Class receives its scheduled maintenance. This includes oil changes, air filter replacements, and spark plug checks (if applicable), all of which contribute to optimal engine performance and fuel economy. The U.S. Department of Energy also offers maintenance tips for improving fuel economy. Additionally, using the correct grade of motor oil, as specified by Mercedes-Benz, is crucial.
- Fuel Choice: For gasoline models, always use the recommended premium unleaded fuel. While it might seem counterintuitive, using lower octane fuel in an engine designed for premium can lead to reduced performance and potentially poorer efficiency. The GL 350d should use high-quality diesel fuel.
Comparing Highway Mileage: GL-Class vs. Competitors
When looking at the luxury full-size SUV segment, the 2017 Mercedes-Benz GL-Class holds its own in terms of highway mileage, especially when comparing the diesel variant. Let’s briefly look at how it stacks up against some key competitors from the same model year.
| Vehicle | Engine (Highway MPG Estimate) |
|---|---|
| 2017 Mercedes-Benz GL 350d 4MATIC | 3.0L V6 Diesel (23 MPG) |
| 2017 BMW X5 xDrive35d | 3.0L I6 Diesel (Up to 30 MPG) |
| 2017 Audi Q7 3.0T | 3.0L V6 Supercharged Gas (Up to 25 MPG) |
| 2017 Cadillac Escalade | 6.2L V8 Gas (Up to 17 MPG) |
| 2017 Land Rover Range Rover HSE | 3.0L V6 Supercharged Gas (Up to 22 MPG) |
This comparison highlights that while the GL 350d is efficient for its class, some diesel competitors, like the BMW X5 xDrive35d, might offer even higher highway MPG. The gasoline counterparts on average fall within a similar efficiency bracket, with the GL 550 being at the lower end among these luxury SUVs.
Common Questions About 2017 GL-Class Highway Mileage
Here are some frequently asked questions that owners and prospective buyers often have regarding the 2017 Mercedes-Benz GL-Class highway mileage:
FAQ Section
Q1: What is the typical highway MPG for a 2017 Mercedes-Benz GL 450?
A1: The 2017 Mercedes-Benz GL 450 4MATIC is EPA estimated to achieve approximately 21 MPG on the highway. Real-world mileage can vary.
Q2: Is the diesel GL 350d significantly more fuel-efficient on the highway than the gasoline GL 450?
A2: Yes, the GL 350d typically offers better highway mileage. The diesel GL 350d is rated for about 23 MPG on the highway, while the GL 450 is rated for 21 MPG. The torque from the diesel engine also makes it very comfortable for long highway cruising.
Q3: Does the GL 550 have good highway mileage for a V8 engine?
A3: For a full-size luxury SUV with a powerful 4.6-liter biturbo V8 engine, the GL 550’s highway rating of up to 17 MPG is competitive. However, it is the least fuel-efficient option in the 2017 GL-Class lineup.
Q4: Are there any specific maintenance items that most impact highway fuel economy on a 2017 GL-Class?
A4: Yes, ensuring the air filter is clean, the tires are properly inflated to the manufacturer’s recommendation, and that spark plugs are in good condition (for gasoline models) are critical for optimal highway fuel economy. Regular oil changes with the correct viscosity are also paramount. You can find a guide to vehicle maintenance from the U.S. Department of Energy.
Q5: Can I improve the highway mileage of my 2017 GL-Class with aftermarket modifications?
A5: While some modifications might claim to improve mileage, they can often void warranties or negatively impact performance and emissions. Sticking to manufacturer-recommended maintenance and driving for efficiency are the most reliable ways to manage your GL-Class’s fuel economy. Major aerodynamic changes or engine tuning might be complex and are best approached with expert advice.
Q6: Does the 4MATIC all-wheel-drive system affect highway mileage on the GL-Class?
A6: Yes, the 4MATIC all-wheel-drive system, while providing excellent traction and stability, does add a slight amount of weight and drivetrain friction compared to a rear-wheel-drive vehicle. This can lead to a marginal decrease in fuel economy, but for a luxury SUV of this caliber, the benefits of AWD are often considered worth the slight trade-off.
Conclusion: Driving Your GL-Class with Efficiency and Enjoyment
The 2017 Mercedes-Benz GL-Class, whether powered by its efficient diesel or robust gasoline engines, offers a compelling blend of luxury, capability, and respectable highway mileage for its segment. While the GL 350d stands out for its superior fuel efficiency, even the performance-oriented gasoline models provide a comfortable and capable experience on long journeys without excessive fuel consumption when driven mindfully. By understanding the factors that influence your MPG and implementing simple driving and maintenance habits, you can ensure your GL-Class performs at its best, taking you further on every tank. Whether you are embarking on a cross-country adventure or a daily commute, your 2017 GL-Class is engineered to deliver a premium driving experience with the efficiency you need. Enjoy the ride!
