The base Mercedes C-Class has a starting price of $40,250. This for the entry-level C 300 model with the 241-hp 2.0-liter turbocharged four-cylinder. Everyone knows that the most expensive C-Class is the twin-turbo V8 C63 AMG, which starts at $67,095. However, this doesn't necessarily make it the most expensive C-Class on the market. We configured the most expensive C 300 4Matic sedan, and we were able to bump the price all the way up to $74,097. Granted, this required optioning a ton of dealer-installed options and accessories such as floor mats, cargo boxes and bike racks, and other items which amounted to over $2,600.