It might have tons of snow in the mountains out there in Switzerland. There will be no chance to bike then, just skiing. And skiing isn't the right stuff for Pro players. Federer doesn't ski anymore, because he could get injured easily. Djokovic thinks different, as far as I know. Maybe Ernests is more interested in AprŤs-Ski anyways.
About the car. He can go for a car in tournaments. Munich or Stuttgart for example.