[prydey]

Following the correct procedure in the tech portal (which is pretty much what I did yesterday anyway) has made no difference to the level of coolant in the header tank, which has stayed at that level from the moment I filled it.

Either I've managed to fill it up without any air becoming trapped anywhere, or there is some stubborn air somewhere in the system.

either way, the car drives fine, warms up fine, and temp gauge sits where it used to, and the heater pumps out hot air.

Just have to keep an eye on it. Just strange that I put less in than what I drained out, and the level from dead cold, to hot, isn't changing at all.