I just bought a Merc SLS AMG, and tuned it to the max. I did couple of races with it and then quit the game. When I came back to it the next day, the Merc only had the aero pack and new wheels on, but no tuning items. I didn't know what happened, and tuned it again. After a couple more races I quit the game, and came back to it the next day, and behold, the Merc again only had its new wheels and aero pack, but no tuning items. WTF!!!??!
