There are 2 hoses to the heater matrix, another hose from the water pump to under the flange where the top hose goes, and the little return hose that goes from the rad to the header tank

If the coolant is a nice blue colour you probably wont have to worry about flushing it out too much, like I say the G12+ will mix with any other type without going funny. Just blast the matrix, the block and the radiator through with a hose. Another trick is after you drain it, fill it back up with tap water and run the engine for a few minutes then drain it again, that should clean most of the old coolant out

50:50 mix is what I use and my engine has been fine all winter and doesn't run hot
