The Impala nameplate spans six decades and two entirely different missions: the '60s SS models are among the most beautiful American cars ever built, while the modern FWD sedan is a spacious, comfortable highway cruiser with a ticking clock under the hood. That clock is the 4T65e transmission, which fails with enough consistency that police fleets, high-mileage civilian owners, and forum threads all independently name it as the car's Achilles' heel, often giving out between 150k and 220k miles. If you're restoring a classic, you're buying into a legend with straightforward mechanicals and endless parts support. If you're shopping the 2000s-era FWD generations, budget for a transmission rebuild and you'll likely get your money's worth.
Which C-Class you're eyeing matters more than the badge. The W204 and W205 generations built the reputation, diesels that shrug off 400,000 kilometers, interiors that age gracefully, the kind of solidity that justifies the star. Then came the 2022 W206 redesign, and Mercedes made a choice: massive touchscreens, competitive EV range, but cheaper cabin materials and climate controls buried in menus you can't safely adjust while driving. Worse, owners of 2023-2024 models report Mercedes abandoning software updates, locking them out of features the 2025s get. If you want a C-Class that feels like the Mercedes you remember, hunt down a clean W205. If screens matter more than switchgear and you can live with some cost-cutting, the W206 does luxury-adjacent competently enough, just know the trade you're making.