Mercedes GL-Class 2017 Fuel Economy: Effortless Power

The 2017 Mercedes-Benz GL-Class delivers impressive power with respectable fuel economy for its class. While not a fuel-sipper, understanding its consumption helps manage expectations and optimize driving. This guide breaks down its MPG figures and offers tips for maximizing efficiency without sacrificing that signature effortless Mercedes power.

Driving a luxury SUV like the 2017 Mercedes-Benz GL-Class brings a sense of command and capability. It’s a vehicle designed for comfort, space, and effortless power. For many owners and prospective buyers, a common question arises: “How does this impressive machine handle fuel consumption?” It’s a natural concern, balancing the desire for robust performance with the practicalities of running costs. This guide is here to demystify the fuel economy of the 2017 GL-Class. We’ll explore its official ratings, understand what influences them, and share actionable tips to help you get the most miles per gallon. Get ready to feel confident and informed about your GL-Class’s thirst.

Table of Contents

Understanding the 2017 Mercedes-Benz GL-Class Fuel Economy

The 2017 Mercedes-Benz GL-Class, now known as the GLS-Class for the 2017 model year facelift, offered robust performance coupled with a certain efficiency expected from a large, capable luxury SUV. It’s important to approach its fuel economy not as a sports car or compact sedan, but as a vehicle engineered for hauling people and cargo in premium comfort, often with sophisticated all-wheel-drive systems.

At its core, the GL-Class was equipped with powerful engines designed to provide that signature Mercedes-Benz effortless acceleration. This inherently means a certain level of fuel consumption. However, Mercedes-Benz engineers have always strived to balance performance with technology aimed at improving efficiency where possible.

Key Factors Influencing Fuel Economy

Several elements contribute to the real-world fuel economy you’ll experience with your 2017 GL-Class. Understanding these can help you refine your driving habits and maintenance for better results.

Engine Options and Drivetrain: The GL-Class was available with different engine configurations, most notably a V6 and a potent V8. The engine’s size, power output, and how it’s paired with the transmission significantly impact fuel usage. All models came standard with Mercedes-Benz’s 4MATIC all-wheel-drive system, which, while providing excellent traction and stability, can add a slight penalty to fuel economy compared to rear-wheel-drive counterparts.
Driving Style: This is perhaps the most significant variable. Aggressive acceleration, hard braking, and high speeds dramatically increase fuel consumption. Smooth, consistent driving is the most effective way to conserve fuel.
Driving Conditions: City driving, with its frequent stops and starts, typically yields lower MPG than highway driving, where the engine can maintain a more consistent RPM. Factors like traffic congestion, road gradients, and even weather (e.g., strong headwinds) play a role.
Vehicle Load and Aerodynamics: Carrying heavy loads or towing can increase fuel consumption noticeably. Similarly, externally mounted cargo carriers (like roof racks) can disrupt the vehicle’s aerodynamics, leading to higher fuel use, especially at highway speeds.
Vehicle Maintenance: Regular maintenance is crucial. Properly inflated tires, clean air filters, and a well-serviced engine and transmission contribute to optimal fuel efficiency. Ignoring these basic maintenance needs can lead to a noticeable drop in MPG.

2017 GL-Class Official MPG Ratings

The official EPA (Environmental Protection Agency) estimates provide a benchmark for comparing different vehicles. For the 2017 Mercedes-Benz GL-Class (which, as noted, is the GLS-Class designation for this model year), the primary models were the GL 450 4MATIC and the GL 550 4MATIC.

GL 450 4MATIC

The GL 450 4MATIC was powered by a 3.0-liter biturbo V6 engine, producing a healthy 362 horsepower.

| City MPG | Highway MPG | Combined MPG |
| :——- | :———- | :———– |
| 17 | 23 | 19 |

GL 550 4MATIC

The GL 550 4MATIC featured a more potent 4.7-liter biturbo V8 engine, delivering 449 horsepower.

| City MPG | Highway MPG | Combined MPG |
| :——- | :———- | :———– |
| 13 | 18 | 15 |

Source: U.S. Environmental Protection Agency (EPA) Fuel Economy Website (fueleconomy.gov)

These figures are estimates under standardized testing conditions. Real-world results will vary based on the factors discussed earlier. The V8 in the GL 550 naturally consumes more fuel than the V6 in the GL 450, but it also offers significantly more power and torque for those who prioritize performance.

Maximizing Your 2017 GL-Class Fuel Economy: Practical Tips

Achieving the best possible fuel economy with your 2017 GL-Class involves a combination of smart driving habits, diligent maintenance, and an understanding of your vehicle’s capabilities. Here are some practical tips to help you get more miles out of every gallon.

1. Adopt Eco-Friendly Driving Habits

Your driving style has a direct and immediate impact on your fuel consumption. Making small adjustments can lead to significant savings over time.

Smooth Acceleration and Braking: Avoid rapid starts and sudden stops. Accelerate gently and anticipate traffic flow to brake smoothly and early. Coasting when possible can save a surprising amount of fuel.
Maintain Steady Speeds: On the highway, using cruise control can help maintain a consistent speed, which is more fuel-efficient than constantly fluctuating your speed.
Observe Speed Limits: Fuel economy generally decreases significantly at speeds above 50 mph. Driving at or below the posted speed limits, especially on highways, will improve MPG. According to the U.S. Department of Energy, every 5 mph you drive over 50 mph is like paying an additional $0.24 per gallon for gas (based on national averages).
Minimize Idling: If you anticipate being stopped for more than 30-60 seconds (e.g., waiting for someone, long train crossing), it’s often more fuel-efficient to turn off the engine.

2. Keep Up with Vehicle Maintenance

A well-maintained vehicle runs more efficiently. Regular servicing ensures all components are working optimally.

Tire Inflation: Properly inflated tires reduce rolling resistance, meaning your engine doesn’t have to work as hard to move the vehicle. Check your tire pressure regularly, especially with changes in temperature. The correct pressure is usually listed on a sticker in the driver’s side doorjamb and in your owner’s manual.
Air Filter: A clogged engine air filter restricts airflow to the engine, making it less efficient and potentially reducing power. Replace it according to your maintenance schedule or sooner if it appears dirty.
Regular Service Intervals: Follow Mercedes-Benz’s recommended maintenance schedule. This includes oil changes, spark plug replacement, and ensuring the engine and transmission are in good working order.
Wheel Alignment: Poor wheel alignment can cause tires to drag, increasing resistance and fuel consumption.

3. Optimize Aerodynamics and Load

The shape and weight of your vehicle play a crucial role in how much fuel it uses.

Remove Unnecessary Weight: The heavier your vehicle, the more fuel it needs to move. Remove any heavy items from your cargo area that you don’t need for your journey.
Reduce Drag: Remove roof racks, cargo boxes, or bike racks when they are not in use. These accessories significantly increase aerodynamic drag, negatively impacting highway fuel economy.

4. Utilize Vehicle Technology

Mercedes-Benz vehicles are equipped with advanced technology that can assist with fuel efficiency.

ECO Start/Stop Function: Many Mercedes-Benz models feature an ECO Start/Stop function that automatically shuts down the engine when the vehicle is stationary (e.g., at a red light) and restarts it when you release the brake. While this primarily saves fuel during idling, it’s a key efficiency feature. Ensure it’s activated.
Transmission Modes: If your GL-Class has selectable driving modes (e.g., Comfort, Sport, Manual), selecting a more economy-focused mode can adjust throttle response and shift points for better fuel efficiency.

5. Plan Your Routes

Smart route planning can save fuel and time.

Avoid Congestion: Use navigation apps to identify and avoid heavy traffic. Stop-and-go driving is very inefficient.
* Combine Errands: Plan your trips to accomplish multiple tasks in one outing. Cold engines are less efficient, so minimizing cold starts by combining short trips can help.

Comparing GL-Class Models: Power vs. Economy

When considering the 2017 GL-Class, it’s essential to recognize the trade-offs between its available models. The choice between the GL 450 and the GL 550 involves a direct comparison between V6 efficiency and V8 power.

As the table illustrates, there’s a noticeable difference in fuel economy, with the GL 450 offering a superior combined MPG. However, the GL 550 delivers a significant boost in horsepower and torque, providing a more exhilarating driving experience and greater towing capability. The decision hinges on your priorities: if maximizing fuel dollars is paramount, the GL 450 is the more sensible choice. If you prioritize the potent performance that a V8 engine provides, the GL 550 delivers it, albeit at a higher fuel cost.

Advanced Considerations for Fuel Efficiency

Beyond the basics, a few more advanced aspects can influence your GL-Class’s fuel consumption and overall health.

Understanding the Role of 4MATIC All-Wheel Drive

Mercedes-Benz’s 4MATIC is a sophisticated all-wheel-drive system designed to distribute power between the front and rear axles for optimal traction and stability under various conditions. Unlike many older AWD systems, 4MATIC is generally quite efficient. However, any system that engages all four wheels will inherently have slightly more drivetrain loss than a purely rear-wheel-drive setup, leading to a moderate impact on fuel economy. The benefits in terms of safety and all-weather capability are often considered a worthwhile trade-off for many owners of large luxury SUVs.

Towing and its Impact

The GL-Class models are capable tow vehicles. However, towing significantly increases fuel consumption. The added weight and aerodynamic drag of a trailer require the engine to work much harder. When towing, expect your MPG to drop considerably, potentially by 20-50% or more, depending on the trailer’s size, weight, and aerodynamic profile. For this reason, it’s always best to plan for more frequent fuel stops when towing. For guidance on towing capacities and safety, always consult your owner’s manual and local regulations. Resources like the National Highway Traffic Safety Administration (NHTSA) offer general towing safety information.

Tire Technology

The type of tires you choose can also influence fuel economy. Low rolling resistance (LRR) tires are designed to reduce the energy lost as the tire deforms while rolling. While they can offer a slight MPG improvement, they may sometimes come with compromises in grip, noise, or ride comfort. When it’s time for new tires, discuss LRR options with your tire professional, but also consider how they align with the overall driving experience you expect from your GL-Class.

Frequently Asked Questions (FAQs)

Q1: What is the best fuel economy I can expect from a 2017 Mercedes GL-Class?
A1: According to EPA estimates, the most fuel-efficient model is the GL 450 4MATIC, rated at 19 MPG combined (17 city/23 highway). However, real-world results will vary based on driving conditions and style.

Q2: Does the V8 engine in the GL 550 make a big difference in fuel economy?
A2: Yes, the GL 550 4MATIC, with its larger V8 engine, is rated at 15 MPG combined (13 city/18 highway), which is noticeably less efficient than the GL 450. This is a common trade-off for increased power and torque.

Q3: Is the 4MATIC all-wheel-drive system bad for fuel economy?
A3: While all-wheel-drive systems generally consume slightly more fuel than rear-wheel-drive systems due to increased drivetrain components, Mercedes-Benz’s 4MATIC is designed to be efficient for its class. The benefits in traction and stability often outweigh the minimal MPG penalty for many drivers.

Q4: How can I improve the fuel economy of my 2017 GL-Class?
A4: Practice smooth acceleration and braking, maintain consistent speeds, keep tires properly inflated, perform regular maintenance, remove unnecessary weight, and avoid aggressive driving. Using the ECO Start/Stop function also helps.

Q5: Should I use premium fuel in my 2017 GL-Class?
A5: Mercedes-Benz vehicles are designed and engineered to run on premium unleaded gasoline. Using a lower octane fuel could potentially lead to reduced performance and efficiency, and may even cause engine knocking or pinging. Always refer to your owner’s manual for the manufacturer’s specific recommendation.

Q6: What is the ECO Start/Stop function and how does it affect fuel economy?
A6: The ECO Start/Stop function automatically shuts off the engine when the vehicle is stopped (e.g., at a traffic light) and restarts it when you lift your foot off the brake. This significantly reduces fuel consumption during idling periods, contributing to better overall efficiency, especially in city driving.

Q7: How much does towing affect the fuel economy of a 2017 GL-Class?
A7: Towing significantly increases fuel consumption due to the added weight and aerodynamic drag. Expect a noticeable drop in MPG, potentially 20-50% or more, depending on the trailer’s size and weight. Planning for more frequent refueling is advisable when towing.

Conclusion

The 2017 Mercedes-Benz GL-Class, or GLS-Class as it became known, represents a pinnacle of luxury, space, and commanding performance in the SUV segment. While its powerful engines are a key part of its appeal, understanding its fuel economy is crucial for responsible ownership. The official EPA ratings provide a clear benchmark, with the GL 450 4MATIC offering a more economical experience compared to the potent GL 550 4MATIC.

By adopting mindful driving habits, ensuring consistent vehicle maintenance, and leveraging the vehicle’s built-in technologies, owners can effectively manage and even enhance their GL-Class’s fuel efficiency. From smooth pedal control and proper tire inflation to reducing unnecessary weight and drag, every small step contributes to more miles between fill-ups.

Ultimately, the 2017 GL-Class delivers effortless power wrapped in luxury. When approached with an awareness of its fuel consumption and armed with the knowledge to optimize it, you can continue to enjoy the sophisticated driving experience and unwavering capability that only a Mercedes-Benz can provide, making every journey as smooth and as efficient as possible.

Mercedes GL-Class 2017 Fuel Economy: Effortless Power