TripleBee
Why would you not top it up completely? That warning means that you must at least top up to that amount. If your fuel light comes on, will you top it up, or just put in some liters?Tells you on the display. Range left and amount needed to refill. Do not fill to the brim just the amount on display.
If you tup up your AdBlue completely, the warning light will go on much later, giving you more miles to run before you need to top up AdBlue again.