The 2018 Mercedes-Benz GLC350e 4matic achieves 25 MPG combined, a so-so figure that only tells part of the story. For those navigating affluent suburbs with access to home charging, this plug-in hybrid delivers on the promise of emission-free local driving. But for those who see it primarily as a luxury SUV used on long highway trips, its fuel economy is merely adequate.

City and highway performance

The GLC350e’s EPA rating of 24 MPG in the city and 27 MPG on the highway reveal a critical aspect of its design: this vehicle is optimized for stop-and-go driving. The electric motor provides instant torque, allowing emissions-free progress around town for trips within its limited electric range. Once depleted, the gasoline engine kicks in, turning the GLC350e into a fairly typical hybrid, but still offering fuel savings compared to the non-hybrid GLC. On the highway, the electric motor plays a smaller role, and the GLC350e’s fuel economy settles closer to that of a conventional gasoline-powered SUV.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2018 Mercedes-Benz GLC350e 4matic at $2,300. This figure is based on driving 15,000 miles per year, with a specific percentage allocated to city versus highway driving, and using the national average fuel price at the time of calculation. Your actual fuel expenditure may vary widely.

Those who consistently plug in and primarily drive short distances will spend significantly less, potentially offsetting the cost of electricity with gasoline savings. Conversely, those who rarely charge the battery and primarily drive long distances will likely find their annual fuel costs exceeding the EPA estimate. The cost of electricity will also need to be factored in, depending on local electricity rates.

Real-world expectations

Drivers who frequently use the GLC350e’s plug-in capabilities are generally satisfied with its real-world fuel economy. Short commutes, school runs, and errands can often be completed solely on electric power. However, expect range to diminish significantly in colder temperatures. Owners who regularly drive beyond the electric range or neglect to plug in may see fuel economy figures closer to 22-24 MPG in mixed driving. Driving style also plays a role, aggressive acceleration and high speeds will quickly deplete the battery and reduce overall efficiency.

How it compares

The GLC350e competes in a crowded segment of luxury SUVs, including other plug-in hybrids. Consider the Lexus NX 450h+, a plug-in hybrid that boasts a considerably better 36 MPG combined and all-electric driving range. Another alternative is the BMW X3 xDrive30e, which delivers an EPA-rated 22 MPG combined, although real-world figures can be much higher with regular charging. Standard gasoline-powered competitors like the Acura RDX SH-AWD consistently achieve around 23 MPG, while offering more cargo space. For buyers prioritizing electric range and overall efficiency above all else, exploring the Lexus or BMW options may be worthwhile. However, those specifically seeking the Mercedes’ blend of luxury, technology, and plug-in capability will find fewer direct alternatives. Be sure to check GLC350E MPG across all years to see how this vehicle has evolved.

Tips to maximize efficiency

Prioritize charging whenever possible. Even short charging sessions can add valuable electric range and reduce your reliance on gasoline. Make it a habit to plug in at home overnight, and consider using public charging stations during the day. The GLC350e’s electric range isn’t huge, but consistently topping it off makes a significant difference.

Use the GLC350e’s driving modes effectively. Select “Electric” mode for short trips around town to maximize electric-only driving. Use “Hybrid” mode for longer journeys, allowing the car to smoothly blend electric and gasoline power for optimal efficiency. “E-Save” can be used to conserve battery charge while on the highway, preparing it to use in city driving later.

Drive smoothly and avoid aggressive acceleration. The electric motor provides instant torque, so there’s no need to stomp on the accelerator to get moving. Gentle acceleration and consistent speeds will help conserve battery power and improve overall fuel economy.

Keep tires properly inflated. Underinflated tires increase rolling resistance, which reduces fuel efficiency. Check your tire pressure regularly and inflate them to the recommended level, as indicated on the sticker inside the driver’s side doorjamb.

Monitor your driving habits using the GLC350e’s onboard energy consumption display. This allows you to see how your driving style impacts fuel economy and electrical consumption, allowing you to make adjustments as needed. Refer to all Mercedes Benz fuel economy data for a broader understanding of the brand’s efficiency.