Ture! So dont worry I know how to use a jack and a wheel. Yes its in the manual somewhere and all over the net if you look for it. A lot of cars have those positions as you indicated in your post, however, in a lot of the ones that I have seen you can visually see the point under the car so its clear. I looked under my A4 and it isnt visually easy to see and knocking the usual area just returned a hollow sound but it has to be there in the usual places, so I thought I bounce it off others on this forum to get their experience on the matter, just like the spare and the jack itself and the red tool. There are a lot of knowledgeable people here, thats the point of forums, and as a moderator of this forum, you shouldnt go assuming people are stupid just because they ask a question.