I drive a 2011 X3 (F25). I wanted to flush my brake fluid but the screen at the top (inside) of the brake fluid reservior would not come out. Does anyone know if a special tool is needed to remove the screen. I know how to bleed brakes (2 Person Method) I have done it several times on different cars such as Honda and Mercedes. This is the first car where I could not remove the screen. I am baffled.It usually just pops right out. NOT this car.