TL4 039 gearbox oil

Hi,
In the last window at very cold temperatures (-15 degrees), it was very hard to use the clutch if I'm not waiting 5 minutes for it to warm up, so now I want to change the oil.
I want to buy Elf Tranself NFX GL4 75W80 1L but I don't know how many liters the gearbox needs. I found 1.9, 2.1, and also 3 on the internet.
Does someone know exactly? The gearbox is TL4 039 and the car is a Clio MK3 GT 1.6.