The combined EPA rating of 77 MPG for the 2023 Mercedes-Benz EQS 580 4MATIC SUV isn’t a typo; it’s the electric equivalent to a gasoline MPG figure, reflecting the impressive efficiency of its all-electric powertrain in a large, luxurious SUV. This isn’t a compact hatchback. This is a flagship Mercedes-Benz, laden with technology, comfort features, and boasting all-wheel drive. Its efficiency sets a high benchmark among its peers.

City and highway performance

Breaking down the EQS 580’s efficiency reveals a slightly higher city rating of 79 MPG, compared to its highway rating of 74 MPG. This might seem counterintuitive to those familiar with gasoline engines, but it’s typical of electric vehicles. The regenerative braking system, which captures energy during deceleration, is most effective in stop-and-go city driving. On the highway, where coasting is more frequent and speeds are higher, regenerative braking plays a smaller role, and aerodynamic drag impacts efficiency more significantly. The EQS SUV’s size and shape influence energy consumption at higher speeds, despite the optimized design.

Annual fuel cost

Based on EPA estimates, the 2023 Mercedes-Benz EQS 580 4MATIC SUV will cost approximately $950 per year to “fuel.” This calculation assumes 15,000 miles of driving annually, using the national average electricity cost per kilowatt-hour. The actual amount you spend will vary based on your local electricity rates, driving habits, and how often you charge at home versus public charging stations.

Many EQS owners install home charging setups, allowing them to capitalize on lower off-peak electricity rates and further reduce their running costs. While the initial purchase price of the EQS 580 SUV is substantial, the long-term savings on fuel, coupled with potentially lower maintenance costs compared to a gasoline vehicle, are significant factors for buyers in this segment.

Real-world expectations

While the EPA ratings provide a standardized benchmark, real-world mileage will vary depending on driving style, ambient temperature, and usage of features like climate control. Aggressive acceleration, frequent use of “Sport” mode, and sustained high-speed driving will all deplete the battery faster. Similarly, cold weather can reduce battery range, as energy is used to heat the battery pack and cabin. However, even with these factors considered, the EQS 580 SUV delivers competitive range for its class, giving owners confidence on longer journeys.

How it compares

Competitors like the BMW iX xDrive50 achieve around 86 MPGe combined. The Tesla Model X Long Range achieves approximately 102 MPGe combined. These figures are important to EQS 580 buyers, who are typically cross-shopping these vehicles and weighing factors like range, charging infrastructure, and brand prestige. Although the EQS 580 SUV’s MPGe rating sits lower, it offers a unique blend of opulent luxury and advanced technology that differentiates it for a specific type of buyer.

A customer drawn to the three-pointed star is very different from a buyer considering an EQS MPG across all years. For details beyond one model, see all Mercedes Benz fuel economy data, which provides valuable context for comparing efficiency across the brand’s lineup.

Tips to maximize efficiency

Use the “Comfort” or “Eco” driving modes whenever possible. These modes optimize the powertrain for efficiency, reducing throttle response and limiting power output to essential systems. While the “Sport” mode offers exhilarating acceleration, it significantly impacts energy consumption.

Precondition the cabin while the vehicle is plugged in. This heats or cools the interior to your desired temperature using grid power, preserving battery range. Program your charging schedule to coincide with off-peak electricity rates to minimize charging costs.

Take advantage of the regenerative braking system by anticipating traffic flow and easing off the accelerator early. The EQS SUV offers adjustable regenerative braking levels, allowing you to customize the level of deceleration and energy recovery. Experiment with different settings to find your preference.

Maintain proper tire inflation. Underinflated tires increase rolling resistance, reducing fuel efficiency. Check your tire pressure regularly and inflate them to the recommended levels, which can be found on the doorjamb sticker.

Reduce aerodynamic drag by removing unnecessary items from the roof rack or cargo box. Even minor changes to the vehicle’s aerodynamics can impact fuel efficiency, particularly at highway speeds. Minimize excessive cargo weight, as this also increases energy consumption.