2026 Mercedes-Benz C300 Reviews & Ratings

The Mercedes-Benz C300 Reliability Rating is 3.5 out of 5.0, which ranks it 13th out of 31 for luxury midsize cars. The average annual repair cost is $739 which means it has average ownership costs. While repairs are more common, these issues are less likely to be severe than with other cars. Expect to make slightly more trips to the shop with a C300, but for minor issues.