Two completely different cars wear this badge depending on when it was built. The 2009-2012 models burn oil from flawed piston rings, an expensive fix that makes those years a hard pass. But the current B9 generation (2017+) is genuinely reliable if you maintain it properly, which means premium fuel, timely oil changes, and no skipped service intervals. This isn't a Camry you can neglect. New pricing at $52k for a base model is laughable, but a 2-3 year old Premium Plus with ventilated seats around $34k is where the A4 makes sense: refined interior, Quattro that actually works in snow, and 40+ mpg highway. Buy it used, maintain it religiously, or skip it entirely.
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.