Have you ever seen the level indicate other than 80%? I found another guy on here with the exact same issue. how to check reducing agent level in 2011 Touareg. Either my sensor is bad, the software isn’t reading the right thing, or there is no sensor to read. OBDEleven is just like VCDS, except wireless & through a phone. My VCDS is out of VINs, so I decided to try something different.YES, there is a level sensor. I don't know what OBDEleven is, it must be like the Torque App? I have a VCDS cable and Ross-Tech software, and AdBlue does show it's tank level.