paulweller84:
A lot of Scania trucks with AdBlue will have the level displayed top and centre of the dash screen. It has a small ‘fuel pump’ symbol with AdBlue written below and a green level bar next to it.Sent from my iPhone using Tapatalk
yes you’re right, and I had mistaken the green bar to be the amount of DIESEL I had in there only to have HUGE FLASHING YELLOW warning lights telling me I had no diesel left in tank when I was 30 miles away from my destination (and no fuel card in lorry LOL) 
oh well, part of being a newbie again I guess 