I have been observing the expansion tank coolant level and it was down to the lower level.
I thought that it might just be expansion and drove from Brisbane to Mt Tamborine then Oxenford back to Brisbane.
The low coolant alert came on and I topped up the expansion tank with 225ml.
There has been no evidence of telltale leaks on the garage floor nor the engine bay. I got my sniffer hound to smell for sweet coolant but nothing to detect there.
So where does 225ml of coolant vanish to?
Should I suspect a thermostat water pump failure? Or the elbow at the back of the engine?
I have warranty with VW, should I report this to VW with photos.

Cheers Al