coolant system, crack in antifreeze resvoir tank on 2005 BMW 325i

the antifreeze leaking, stall on highway, continue to fill withantiifreeze trying to get home, went thrugh 3 bottles, we thought a hose had a hole in it,come to find out the tank that is the resvior for the antifreeze has a crack, why would this happen, and my window washer fluid will not release fluids, and my gas tank will not close why

1 answer
the radiator, coolant reservoir, hoses, thermostat housing are all made of plastic. someone will need to pressure test the system to find the leak. do not put this off; these engines overheat very easily and can be
damaged beyond repair. find a good independant BMW shop
that other people recommend.