Hello, I would like to change from my MB C Coupé to the BMW 8er world. Here with the 850i (V8 BiTurbo) just becomes more and more interesting for me personally and is a development of a 6 cylinder. Question therefore: how is your experience regarding longevity and also diseases of the G15 engine? Can one buy such a car from a BMW dealer from first hand with 80,000 KM without hesitation? Of course, this always depends on the previous owner, yet there are engines that are more susceptible to Problems are like others. Please pass on your expertise! Greetings