One of the key criticisms of the current EQS has been its unconventional and somewhat "bulbous" design. This aesthetic, along with certain ergonomic complaints, has left some buyers underwhelmed. By integrating the electric and gas-powered S-Class models under one design language, Mercedes-Benz hopes to create a more visually cohesive and elegant lineup. While both models are expected to share many design elements, their underlying platforms will likely lead to differences in proportion, especially with the electric version taking advantage of its dedicated EV platform.

EV platforms generally allow for longer wheelbases, reduced overhangs, and better interior packaging due to the absence of traditional mechanical components such as engines and transmissions. This should make the all-electric S-Class more spacious and streamlined compared to the current EQS. It’s worth noting that the shift could also apply to the next-generation E-Class, which is expected to follow a similar approach by offering both ICE and EV variants.

Before the unified S-Class arrives, Mercedes is set to introduce a facelift for the EQS in 2025, which could bring significant technological improvements. One of the most anticipated upgrades is the switch to an 800V architecture, which would enable faster charging. With this new system, the EQS could replenish its battery from 10% to 80% in just 21 minutes. Additionally, a potential upgrade in battery chemistry might further extend its range. For the 2025 model year, Mercedes has already increased the EQS’s battery capacity from 108.4 kWh to 118 kWh, resulting in an impressive WLTP range of 511 miles, though the U.S. EPA rates it at a more modest 371 miles.

Meanwhile, the current gas-powered S-Class is scheduled for a facelift in 2026, with Källenius hinting that the company is investing heavily in this update, far beyond what is typically allocated for a mid-cycle revision. These facelifts will serve as a bridge until the unified S-Class arrives around 2030, marking a new era for the brand's flagship.

Despite these upcoming changes, 2024 has been a challenging year for Mercedes-Benz’s luxury sedans. Sales of the S-Class plummeted by nearly 37% in the first quarter, while combined deliveries of the S-Class, EQS, EQS SUV, and GLS dropped by 23% in the second quarter. As a result, production has been reduced to a single shift. The decline in demand raises questions about the future of luxury sedans, but Mercedes-Benz appears committed to evolving its flagship line to meet the needs of the modern luxury car buyer.

The decision to replace the EQS with an electric S-Class marks a strategic pivot for Mercedes-Benz as it prepares for the future of luxury mobility. By unifying its flagship sedan lineup and offering both ICE and EV versions of the next-generation S-Class, Mercedes aims to blend the best of both worlds: the tradition of internal combustion engines and the innovation of electric vehicles. The move should help streamline production and development costs while giving buyers more choices at the pinnacle of luxury. As the industry moves toward electrification, the all-electric S-Class could prove to be a game-changer in the evolving world of high-end automotive design and technology.