UPDATE：Believe it or not, 老婆回家的路上后轮突然不转了

I went to the dealer this morning. Basically they denied any wrong doing and insisted that my wife drove the car with the parking-break on. They said it was their conclusion after inspecting the brake, although I told them the parking brake was definatelly off yesterday. They hold my car and asked me to pay the towing. What a bad dealer service.