Rational purchase

Hello municipality, so, I own a Vectra C BJ 06 with good equipment. But a problem, well, I have several problems… The trunk is always too small for me -> so combi I get annoyed to switch -> so automatic I don’t see anything at night -> so xenon so, my Vectra has now got 100,000km on it within 4 years, I bought it with 16,000km. I now thought that I would buy a new car, which is in class E-Class, A6, 5 BMW I am tied to approx. 18,000 EURO. I have now looked and looked and I already find something with my ideas and wishes, but the cars have already already put 100,000-120.000 km on it. Now just a general question in the room. What would you do? Vectra continue or change? To do this you have to know, I will have to change the front window at the Vectra, about 500 euro further the brakes are on, approx. 250 euro, approx. 500 euro , further the climate control and window lifter are defective, cost about 200 euro. so, all in all 1500 euro… and that has to be done because of tuv. the car is still about 6000 euro worth I want to drive the car again 4 years, so again 100000km put on it… am looking forward to an exciting discussion mfg patrick