See
http://www.myturbodiesel.com/1000q/v...pf-audi-q7.htm for more on Adblue specs, safety and handling, Adblue storage, and Adblue cleanup. The video shows how to replace Adblue DEF on a 2012 VW Touareg TDI. The same thing applies to the 2009-2010 but their adblue capacity is only 4.5 gal instead of 5.5 gallons.
Also shown is checking the Adblue fluid level. There's no way to check Adbluid fluid levels without VCDS since there's no dipstick or meter.
And sorry for my butchering of the word "Kruse"! It's pronounced like "kru (guttural r) ser".