The 4-door coupe is a big success if you look at the Mercedes CLS, Audi A7 and A5, BMW 6 Gran Coupe. But also the Volkswagen CC is a small success for VW. Now everyone is going even smaller. The new Mercedes CLA is an enormous success in European and North-American markets. Volkswagen is planning a smaller 4 door coupe based on the Volkswagen Golf. It will slot just above the more conventional looking Jetta and under the bigger Passat.