Perhaps a bit unfair as both the C coupe and CTS coupe are massively long in the teeth...
http://www.bmwblog.com/2014/07/15/b...-coupe-vs-mercedes-benz-c350-vs-cadillac-cts/
http://www.bmwblog.com/2014/07/15/b...-coupe-vs-mercedes-benz-c350-vs-cadillac-cts/