Newby 2014 Q5 TDI - How do I find the DEF used percent ?

Getting ready to do 15k maintenance but want to where to find the level of the DEF tank. I have read that in engine, advanced measures, sensors may be but no luck., help.

Thanks,

Pedro

Post up a scan please so we can see the ECU part numbers and (if applicable) the ASAM ID.

-Uwe-