Audi A6 vs Mercedes-Benz S-Class

The redesigned 2026 Audi A6 marks the ninth generation of midsize luxury sedans from Ingolstadt, Germany. While it shares a name and some tech features with the Audi A6 e-tron introduced for the 2025 model year, the gasoline A6 is an otherwise different vehicle based on the same Premium Platform Combustion (PPC) as the A5 sedan and Q5 crossover. A redesign was certainly needed as most other midsize luxury sedans—specifically the BMW 5 Series and the Mercedes-Benz E-Class—were renewed more recently, and we haven’t had a genuinely new A6 since the 2020 model year.

Verdict: On paper, the A6 looks like more of a premium product than before, but it doesn’t feel that way from behind the wheel, and the tech is a work in progress.

The 2025 Mercedes-Benz S-Class is an automotive icon that fulfills its lofty expectations for comfort, performance, technology, and refinement. Last redesigned for the 2021 model year, the brand’s flagship sedan receives only small changes for 2025.

Verdict: Quite simply, the S-Class is the best luxury sedan that doesn't wear a Bentley or Rolls-Royce badge. With several models to choose from and a dizzying array of options, there seems to be a perfect match for a variety of tastes, provided you have a six-figure budget.