Just enter the following cheatcodes at the main menu screen.

code result resultcht
cokezero Unlocks VW Coke Zero Golf GTI 解開VW Coke Zero Golf GTI
onlinesubaru ?
mitsubishigofar Unlocks Mitsubishi Lancer Evolution 解開Mitsubishi Lancer Evolution
safetynet ?
cashmoney +10000 $
reggame Unlocks VW Golf GTI 解開VW Golf GTI
zerozerozero ?
1mi9k7e1 ?
l1is97a1 ?
w2iollo1 Vinyls?
1ma9x99 ?
horsepower ?
itsaboutyou Unlocks Audi TT 解開Audi TT
worldslongestlasting Unlocks Dodge Viper SRT10 解開Dodge Viper SRT10
energizerlithium ?
castrolsyntec ?
leipzig ?
unlockallthings Unlocks 5 hidden cars + tuning parts 解開5台隱藏車輛＋零件
collectorsed ?