Two Sedans with some similarities, but otherwise different in most aspects such as the ground shadow size, market segment, starting price, horsepower, fuel economy, and height. First of all, there is a $4,990 difference in the base MSRP. The 2016 Mercedes-Benz CLA-Class has a higher starting price than the 2015 Chevrolet Impala. Also, the 2015 Impala has bigger and thirstier engine; the 2016 CLA-Class gets 6.2 more mpg. In addition, the Impala is both significantly larger and slightly taller than the CLA-Class. Among similarities are the body structure and maximum occupancy.