Commuter 50km middle class Audi, Mercedes or BMW

Hi, at the moment I have an Audi b7 2.0 TFSI which I would like to replace soon. I have approx. 50km of commuter route per distance and still private rides. in the year so about 25Tkm. Now to my question: My favourites would be a BMW 5 model, Mercedes E-Class or Audi A5 – each starting at approx.100000TKM. Bj2011 I know the chain problem from my TFSI (my car is nagging in the meantime and he has always something in the meantime). I have heard nothing bad from BMW so far – therefore at least technically my favorite. Important to me is a reasonably sporty chassis and comfort but in particular reliability and mileage. Is there any of you experiences and recommendations? Is some problem already solved or another appeared on which I should pay attention when buying? Up to what mileage can I buy without need? Thank you – No, no, no, no, no, no, no, no, no.