Owners of the Mercedes-Benz C-Class have filed 272 complaints with NHTSA that describe rust, corrosion or peeling paint. That is 9.6% of the 2,820 complaints on file for the model. The 2012 (96 reports) and 2013 (93 reports) model years have the most, followed by 2015 (57). Most of the quotes below describe a corroded …