82 MPGe combined makes the 2025 Mercedes-Benz EQS 450 Plus SUV one of the most efficient, luxurious, and technologically advanced three-row electric vehicles available, a stark declaration in a segment increasingly defined by power figures and charging times. This efficiency number encapsulates the vehicle: deliberate, and designed to cover substantial distances with minimal fuss. This isn’t merely an electrification of an existing platform; its ground-up electric propulsion is tuned for quiet travel and remarkable economy for its size and capability. Buyers opting for the EQS 450 Plus SUV aren’t just looking for an EV; they’re looking for a Mercedes-Benz first and foremost, Stuttgart’s enduring vision of luxury mobility, now redefined for the electric age.

City and highway performance

Diving deeper into the EPA figures reveals 84 MPGe in the city and 79 MPGe on the highway for the 2025 EQS 450 Plus SUV. These numbers illustrate an impressive balance that belies the vehicle’s substantial proportions and premium appointments. The higher city MPGe is typical for electric vehicles, where regenerative braking can recoup significant energy during stop-and-go driving. The EQS 450 Plus SUV excels here, smoothly harvesting kinetic energy while providing a refined driving experience that minimizes driver fatigue. On the highway, the 79 MPGe reflects Mercedes-Benz’s meticulous aerodynamic design and efficient powertrain management, even at sustained speeds. While aerodynamic efficiency naturally decreases at higher velocities, the EQS 450 Plus SUV manages to maintain a strong showing, ensuring that cross-country trips remain both comfortable and economical from an energy consumption standpoint. This isn’t an EV that sacrifices touring capability; it embraces it with quiet confidence.

Annual fuel cost

The EPA estimates an annual fuel cost of $900 for the 2025 EQS 450 Plus SUV. This figure is based on an average driving distance of 15,000 miles per year and national average electricity prices. For the demographic considering an EQS SUV, this low annual operating cost isn’t necessarily the primary motivator for purchase. Instead, it’s a welcome byproduct of choosing an advanced electric powertrain. The buyer of an EQS 450 Plus SUV appreciates the financial efficiency, of course, but equally values the reduction in their carbon footprint and the convenience of home charging. They are accustomed to premium gasoline vehicles incurring annual fuel costs well into the thousands, making the $900 estimate for this luxurious electric SUV a tangible, if secondary, benefit. It reinforces their decision to invest in a forward-thinking, sustainable luxury vehicle without compromising performance or prestige.

Real-world expectations

In real-world driving scenarios, the EQS 450 Plus SUV consistently delivers on its efficiency promise, often exceeding the expectations of drivers accustomed to less integrated electric powertrains. The smooth transitions between regeneration and acceleration, combined with the supremely quiet cabin, enhance the perception of effortlessness, translating directly into optimized energy use. Those who tend to drive with a lighter foot will find themselves easily matching or even bettering the EPA’s combined 82 MPGe. However, engaging in more spirited driving, or consistently using features like the powerful climate control and multitude of electronic amenities, will naturally impact overall efficiency. The weight of the vehicle and its large footprint are constants, yet the advanced thermal management of the battery and the highly efficient permanent magnet synchronous motor ensure that efficiency remains a core competency. The owner understands that even within an EV, driving style and accessory use matter, and the EQS 450 Plus SUV provides ample feedback to encourage efficient habits.

How it compares

Comparing the 2025 Mercedes-Benz EQS 450 Plus SUV directly against its peers reveals its unique positioning in the luxury electric SUV segment. The Mercedes-Benz SUV competes most directly with vehicles like the BMW iX xDrive50, which achieves an EPA estimated 86 MPGe combined, and the Audi Q8 e-tron (formerly e-tron), which clocks in at 80 MPGe combined for the 55 quattro model. The Tesla Model X Long Range, a perennial benchmark, boasts a formidable 102 MPGe combined. While the Model X technically achieves a higher MPGe, the EQS 450 Plus SUV often appeals to a different buyer, one who prioritizes the traditional luxury experience, unparalleled interior quietness, and a more conventional, reliable build quality synonymous with Mercedes-Benz. Buyers comparing the EQS MPG across all years understand that Mercedes-Benz’s focus extends beyond just the highest efficiency number; it encompasses a holistic luxury experience where efficiency is a given, not the sole selling point. The EQS 450 Plus SUV holds its own, offering a blend of range, refinement, and sensible energy consumption within its aspirational class.

Tips to maximize efficiency

To consistently achieve and even surpass the EPA estimates in your EQS 450 Plus SUV, use its advanced regenerative braking system. Experiment with the different recuperation levels available through the MBUX system to find a setting that integrates into your driving style, maximizing energy recovery, especially in urban environments.

Pre-conditioning the cabin while the vehicle is still plugged into a charger minimizes the energy drawn from the battery to heat or cool the interior once you start driving. This is particularly effective in extreme temperatures, conserving valuable range for propulsion.

Monitor your tire pressure regularly. Properly inflated tires reduce rolling resistance, directly translating into better energy efficiency. The EQS 450 Plus SUV’s advanced telematics can alert you to pressure discrepancies, but a manual check before long journeys is always prudent.

Engage the EQS 450 Plus SUV’s various driving modes intelligently. While Comfort mode provides an excellent balance, selecting Eco mode can subtly adjust powertrain response and limit certain energy-intensive features, helping extend your range on longer drives.