Seventy-eight MPGe combined means the 2025 Mercedes-Benz AMG EQS 4matic Plus is not just quick, it is efficient for a vehicle offering 649 horsepower and weighing over 5,800 pounds. This isn’t just an impressive number; it speaks to the relentless pursuit of engineering excellence by AMG, delivering the kind of instantaneous torque and performance buyers expect, but in a package that fundamentally rethinks what a high-performance luxury sedan can be. For the buyer stepping into this electric flagship, 78 MPGe isn’t merely a statistic; it’s a tangible representation of advanced technology integrated into a vehicle designed for both exhilarating drives and effortless daily commutes.

City and highway performance

The distinction between city and highway efficiency is often stark in internal combustion vehicles, but less so with electric powertrains. In the 2025 AMG EQS 4matic Plus, the EPA rates city performance at 76 MPGe and highway at an even more impressive 81 MPGe. This narrow delta highlights the consistent efficiency of the electric drive system. In dense urban environments, the regenerative braking system shines, capturing energy that would otherwise be lost and feeding it back into the battery, making stop-and-go traffic far less impactful on range than in a gasoline vehicle. On the open highway, the EQS’s aerodynamic profile, which boasts a drag coefficient of just 0.20, allows it to slice through the air with remarkable ease, minimizing energy expenditure. This characteristic actually benefits highway driving, as the vehicle doesn’t rely solely on downshifts or engine braking but rather maintains consistent, efficient propulsion. For the AMG buyer, who often finds themselves navigating both penthouse-lined city streets and wide-open Autobahn-esque stretches, this balanced efficiency ensures that performance is always on tap without significant compromise to range, regardless of the driving environment.

Annual fuel cost

The EPA estimates an annual “fuel” cost for the 2025 Mercedes-Benz AMG EQS 4matic Plus of $950. This figure is based on driving 15,000 miles per year, with 45% city and 55% highway driving, using national average electricity prices. It’s a significantly lower figure than virtually any comparable high-performance luxury sedan with an internal combustion engine, illustrating one of the core financial benefits of electric propulsion. While the initial purchase price of an AMG EQS 4matic Plus is substantial, the ongoing operational costs for “fuel” are drastically reduced. This $950 represents the average cost to power the vehicle for a full year of typical driving, an argument for those making the transition to electric, even at the uppermost echelons of the market. Consider the cumulative savings over several years, and this low annual cost becomes a meaningful differentiator, further enhancing the total cost of ownership for a vehicle that already offers a premium experience.

Real-world expectations

While the EPA numbers of 78 MPGe combined are an excellent benchmark, real-world efficiency with the AMG EQS 4matic Plus, like any performance EV, hinges significantly on driving style. For the buyer of this vehicle, who appreciates its immediate and prodigious power output, frequent use of its 649 horsepower will predictably reduce actual range and, by extension, effective MPGe. However, even with spirited driving, the fundamental efficiency of the electric powertrain remains superior to a gasoline equivalent. Factors such as ambient temperature, extensive use of climate control, and chosen drive modes (Comfort vs. Sport+) also play a role. Those who regularly exploit the launch control and push the car to its dynamic limits will find their MPGe figures lower than the EPA estimate, perhaps closer to the 60s, while drivers focused on smooth, composed cruising could readily exceed 80 MPGe. The beauty of this vehicle is its adaptability; it can deliver astounding performance when called upon, or sip electrons with surprising frugality during a long-distance tour. The owners of an AMG EQS 4matic Plus are typically early adopters, technologically astute, and understand that such a powerful EV demands a nuanced approach to efficiency, balancing thrill with practicality.

How it compares

In the rarefied air of high-performance electric luxury sedans, the 2025 Mercedes-Benz AMG EQS 4matic Plus holds its own remarkably well. When we look at its direct competitors, the efficiency figures provide a clear picture. The Porsche Taycan Turbo S, for instance, a formidable performance EV, achieves an EPA combined rating of 73 MPGe (73 city/73 highway). While incredibly quick, the Taycan Turbo S gives up a few MPGe to the AMG EQS. Another consideration is the Tesla Model S Plaid, boasting a staggering 1,020 horsepower. The Model S Plaid manages an impressive 101 MPGe combined (101 city/100 highway), showcasing Tesla’s hallmark efficiency. However, the Model S Plaid serves a slightly different clientele, often prioritizing outright acceleration and range above all else, while the AMG EQS buyer seeks a more traditional definition of luxury, refinement, and interior craftsmanship alongside their performance. The Lucid Air Grand Touring, another contender, offers an astounding 121 MPGe combined (120 city/121 highway) and a nearly unmatched range, though its performance specifications aren’t directly aligned with the AMG’s track-focused intent. For the buyer dedicated to the Mercedes-Benz brand and its particular blend of power and opulent comfort, the AMG EQS 4matic Plus offers a highly competitive blend of efficiency and luxury without sacrificing the iconic AMG driving experience. For more detailed insights into all Mercedes-Benz fuel economy data, our archives provide extensive information. The efficiency of AMG MPG across all years has seen remarkable evolution, especially with the introduction of electric models like the EQS.

Tips to maximize efficiency

To get the most out of your AMG EQS 4matic Plus, intelligent use of the regenerative braking system is important. Instead of relying solely on the friction brakes, modulating your deceleration to allow the car to regenerate energy back into the battery will significantly improve your real-world MPGe and extend your range.

Selecting the appropriate drive mode for your situation can also yield noticeable benefits. While the Sport+ mode unleashes full power, it also sharpens throttle response and stiffens the suspension, which can encourage more aggressive driving. For everyday commuting or long tours, Comfort or Eco mode will optimize power delivery and climate control settings for maximum efficiency.

Pre-conditioning the cabin while the vehicle is still plugged into a charger reduces the energy draw on the battery once you start driving. Heating or cooling the interior using grid power rather than the battery’s stored energy can save a surprising amount of range, especially in extreme temperatures.

Maintaining proper tire pressure is a simple yet effective way to ensure optimal rolling resistance. Underinflated tires increase friction with the road, requiring more energy to move the vehicle. Check your tire pressures regularly, especially before long trips, to ensure they match the manufacturer’s recommendations.

Strategic charging can also play a role in optimizing efficiency and convenience. Use Level 2 charging at home overnight to ensure a full battery each morning, ready for your daily commute or spontaneous drives, reducing the need for high-speed DC fast charging which, while faster, can sometimes be less energy efficient due to grid losses.