Purchase advice Audi A4 B8 or BMW 320D E91

And what does it look like with the BMW 320d E91 EZ 2010? I had read a list of the “BMW_crazy” here in the forum, in relation to the turbo etc. what you should pay attention to… Are there still known problems with the model ? And how is your general opinion about cars with higher mileage (from 125 tkm), this makes sense to buy such a car, even if these are only 3-4 years old? Best regards,