16-07-13, 06:50 PM
Yes, the coolant is filled through the radiator cap since that is the highest point in the circuit. Well the manual says the coolant reservoir should be filled to the maximum level, so I'm bound say that it does have some meaning in the circuit. If you haven't done anything to the coolant for a long time (X years?), I'd suggest draining the old coolant, flushing the system and filling it with new coolant.