So the GTI sprung a low coolant warning light a few days ago, it has only ~16,000 km on the odometer. In service date with me April 21, just under 3 years so it's under a comprehensive warranty. The balloon shaped coolant reservoir has a minimum level mark which is about halfway down, just under the widest middle part and the coolant level was in the bottom quartile. No increase in either coolant or oil temperature and the light came on only during cold starts, not during an engine restart when warm. The VW dealer suggested topping up the coolant by going through their drive through reception area which I did and the warning light has gone. The question is how common is this? I have never had any vehicle so far go through coolant such that a warning light is triggered. Online forums suggest a long standing problem with the plastic heavy design of the water pump going back at least to the Mk 6 GTI, maybe earlier, and a potential leakage there, but the leakage if any has not caused the coolant to leak onto the floor below where the vehicle is parked. Kind of reinforces my belief in only leasing VWs within their 4 year/80,000 km warranty period.