I find it really difficult to read exactly what the radiator water coolant level is via the "white" expansion bottle... I know its marked Min and Max but the white plastic that the expansion/filler container is made from is not very translucent ,, just cant see the anti-freeze/water mix level no matter how much rocking of the car i do!
Best idea so far is to disconnect the top pipe at the expansion bottle ( which is just above the Max point) and fill/drain to this point unless someone has another "bright" idea?