Severely disabled discount / Flatrate / FoFi

Hello dear Motor Talk friends, on behalf of my mother, I receive a 20% discount (on the part of the Ford Works) from Ford on presentation of their severely disabled ID card! My questions now to you; 1. After I have calculated the one or the other on this subject, I came to the following conclusion: – of the 20% who recommend the Ford Works, both the dealer and the Ford Works get 10% each. Therefore, I have the hope (without being shameless now) …) that the dealer also has a little room for manoeuvre, and that maybe one or the other can grant me. (a little bit it will also be due to the respective negotiating skill) 2. I was told by the first FFH that I can not fly the car, since I already get the discount. Is that true, or did he just not want to meet me? (will of course, regardless of, get me more offers) Maybe you have already had an experience on this topic and can give me some tips or suggestions! I am very inexperienced in this field, would be my first new car purchase… Ps: I can represent this offer well for moral reasons, as also various sick trips, doctor visits, purchases etc. are made. (that only for the Nörgler…) Thank you in advance!!!