From the outside, the changes in 2012 C-Class, so less casual observers might not even notice. The only other change is slightly lower rear bumper, revised taillights, and more modern wheels. When you get into the new C-Class, it's a completely different story, as Mercedes-Benz designers rethought the entire interior.
While these touches give the new C-Class a decidedly more upscale feel than the outgoing car, the biggest improvement is that both pop-up navigation system. Each offered the engine is now equipped with direct injection and Mercedes' seven-speed automatic transmission with revised gear ratios for better fuel economy.