Hi guys my golf tdi water level is still dropping after replacing waterpump new waterbottle termostat flange and I dont see any lekkages on engine. However my wayerlevel is still dropping although slowly

Please help

M9ds, please move this to the correct section.

If not visible leaks outside the car , can be:

1.leaking on the heater unit inside the car
2.Mixing with the oil

Have you carefully gone through the visible parts of the cooling system?