Audi s6 / Bmw 645ci / Bmw 750 Li / Maserati Quatr.

Hello all, I am looking for a successor, for my Audi A8 D3 4.2 FSI. Selection is an Audi S6 5.2 bj 2006 (120.000km), a BMW 750LI 5.0 (110.000km) bj 2009 a BMW 645 Ci bj 2006 (145.000)km and a Maserati Quattroporte bj 2006 (96,000) km. All vehicles are check booklets, it is clear to me that it is a matter of taste. I just want to be pointed out the advantages and disadvantages or a direct comparison. For me personally, the BMW 750Li has been very charming until I have learned that this often has engine damage due to injectors, maybe someone can comment on it. The S6 would be my favourite at the moment, maybe it can also be referred to the point of fuel consumption ( do all the above vehicles have to be filled with Super plus??) I hope that we can find a lot of clues in common. d so come to a multifaceted discussion with final decision which stands as winner. Sorry my spelling mistakes. LG Pascal