I looked at this before I bought my vehicle a few weeks ago and I do not think there are many options (for service manauls). I am looking for feedback on the options I know of and other manuals that anyone else has experience with. Bentley does not have a specific manuals for 3.0L TDIs, but does offer some 'training materials' for both the engine and for electrical on a Q7 (not sure about the Touareg or Cayenne). Factory Manuals (https://www.factory-manuals.com/expand-audi-q7-2012-2013-2014-factory-repair-manual-246.html) says they offer the Audi factory repair manual in pdf for $70. I also found a factory repair manual for a VW 3.0L TDI marine engine . . . probably similar to our engines, but not much use for total car repair options which is what I am looking for. Has anyone used or seen the factory manuals? I found a few reviews saying they are the real deal, but I hate to burn $70 on crap.