So my brother's 200 is locked and the keys aren't working, maybe a dead battery? Neither key fob works, and the metal keys inside the fobs are failing to open the door. Any thoughts on what he needs to do to unlock the car? Or is there a way for him to pop the hood to jump the presumably dead battery while its locked? He's called a locksmith to come out tomorrow, but I have my doubts that it will work to get in the car.