Forgive me because I am a bit unsure myself, but has there even been a revision for any of the modles since 2015 that didn't happen this year or that were not just visual(facelift)? Again, not really following the brand new stuff coming out, but the 3.6, 2.5, and 2.0t engines are all covered pretty well. Is there something specific that you're looking for that isnt covered by an "older" guide? Might be easier to help you with your specific vacation topic if we knew where you wanted to go.