I think it's like fuel economy/range remaining
Hammer the van for a bit around town and your remaining fuel range will be low but if you then drive carefully on a motorway and improve economy the remaining fuel range will go up drastically, I assume it's the same for adblue ?
Hammer the van for a bit around town and your remaining fuel range will be low but if you then drive carefully on a motorway and improve economy the remaining fuel range will go up drastically, I assume it's the same for adblue ?