2015 Mercedes-Benz GLK350 4matic Fuel Economy Analysis

20 MPG combined is what owners of the 2015 Mercedes-Benz GLK350 4matic typically experience, a figure that most owners find acceptable. It’s not a compact hatchback, it’s a small luxury SUV known for its German engineering, reliable build quality, and all-weather traction, appealing to buyers more focused on safety, dependability, and a premium driving experience than extreme gas savings. Owners are happy to accept average MPG numbers in exchange for the GLK350’s distinctive character and practical cargo space.

City and highway performance

The GLK350 4matic’s EPA ratings break down to 18 MPG in the city and 24 MPG on the highway. The city figure reflects the fuel consumption that happens in stop-and-go traffic, a common situation for suburban families and urban professionals who are a big part of the GLK350’s customer base. On the open road, the 24 MPG rating can be reached when driven steadily and at consistent speeds. The 3.5L V6 engine, paired with a 7-speed automatic transmission, provides plenty of power for confident merging and passing, but requires careful use of the accelerator to stay close to the EPA estimates. The V6 powertrain is generally smooth and responsive, contributing to a satisfying driving experience.

Annual fuel cost

The EPA estimates an annual fuel cost of $2,900 for the 2015 Mercedes-Benz GLK350 4matic. This number is based on driving 15,000 miles per year, the EPA’s estimated combined MPG, and national average fuel prices. Premium fuel is recommended, which can increase the actual annual cost. This $2,900 figure gives a standard to help potential buyers compare fuel costs across different vehicles and see the GLK350’s operating expenses in the context of overall ownership.

Real-world expectations

While the EPA provides a standardized test, actual MPG often changes based on driving habits, terrain, and maintenance. Aggressive driving, frequent short trips, and neglecting routine maintenance like tire inflation and air filter replacements can hurt fuel economy. On the other hand, careful driving, proper tire inflation, and following the maintenance schedule can help reach numbers closer to the EPA estimates. Based on owner feedback, expect real-world combined MPG to vary between 18 and 22 MPG, depending on driving style and conditions.

How it compares

Compared to its rivals, the GLK350’s fuel economy is in the middle. The BMW X3 xDrive28i, for example, gets a slightly better 24 MPG combined with its turbocharged 4-cylinder engine. The Audi Q5 2.0T gets a similar 22 MPG combined. However, the Acura RDX with its V6 engine offers similar performance with an EPA rating of 22 MPG combined. While more fuel-efficient choices exist, the GLK350 is attractive to buyers who want a naturally aspirated V6 engine’s responsiveness and power delivery more than very high MPG numbers. Potential buyers wanting all Mercedes Benz fuel economy data should do their research before buying.

Tips to maximize efficiency

The GLK350 4matic works best with smooth, consistent acceleration. Avoid fast starts and hard braking, as these greatly reduce fuel economy. Look ahead and keep a steady speed when you can to waste less gas.

Tire pressure is important for fuel efficiency. Check your tire pressure often and keep it at the recommended level listed on the driver’s side doorjamb. Underinflated tires increase rolling resistance, which lowers MPG.

Remove extra weight from the vehicle. Extra cargo adds weight to the engine, using more fuel. Remove items you don’t need regularly to improve fuel economy, and check the roof rack (if it has one) to make sure it’s empty.

The GLK350’s 7-speed automatic transmission has a fuel-efficient gear for highway driving. Use cruise control on long stretches of open road to keep a consistent speed and improve fuel economy. Cruise control reduces quick changes in the accelerator, leading to better MPG.