We've updated our reliability stats for the C-Class to include owner experiences through September 30, 2016. In terms of repair trips per 100 cars per year (lower is better):

2016 C-Class: 24, moderate, small sample size
2015 C-Class sedan: 41, high

We have two additional statistics, "Nada-odds" and "Lemon-odds", to indicate the percentage of cars with no repairs in the past year and those that required 3+ trips to the repair shop:

2015 C-Class sedan: 59, < 1

Additional participants always helpful, especially for years without stats or with small sample sizes.

For the repairs behind these stats, reliability information on other models, and to sign up to help improve this information:

Mercedes-Benz C-Class reliability ratings and comparisons