Once the AdBlue level starts getting low you will have plenty of warnings displayed to you before it completely runs out. You will have the AdBlue sign illuminated on the dash panel along with an explanation symbol displayed.
The remaining mileage left will start to count down from around 1300 miles
Once the AdBlue remaining mileage gets to around 500 miles the display will change to a No Engine Start message.
The mileage will keep counting down all the way to 0 miles
The Display now shows No Engine Start in 496 Miles
It should be very hard to run one of these vehicles out of AdBlue as once you get the NO ENGINE START displayed on the display the system will give you a series of 4 warning chimes every 3 minutes or every time the ignition is switched on
If you have managed to run the AdBlue level mileage down to 0 it will still keep runnig with no faults and the stop start system will carry on working as normal.