Purchase of vehicles after special leasing

Hello Phaeton friends, I could now buy my Phaeton 3.0 V6 TDI DPF 4motion Tiptronic, first registration 7/2007, now 55,000 Km, mehm. New price 77.996.– € for 27,709,– € from VW. The car has been a lot of fun and joy for the last 2 years and I had no problems with the vehicle. If I knew that it would stay that way for a while, I wouldn’t hesitate. But now I’m not really a car freak and I just have to worry that The car would then be almost 7 years old and would probably have about 100,000 km on it. Who has experience with this age group and how is your opinion and advice on the matter. I hope you can make my decision a little easier for me. Thanks Kasparinus