wtf is mega.....and from what i've heard, if you tell a cop "no" to searching your car, they can still search it because you could be hiding something illegal it gives them probable cause to search it. But then again someone else told me that they can only legally search your car if: A. they have a search warrant. or B. you are under arrest.
However from what I have read, if a cop really wants to search your car, they will find a way to search your car.