Just getting to know my 340, and I am finding the sports seat very uncomfortable, unfortunately even though I had quite a long test drive I did not notice how bad there are.
I have had a few E92s and found the seats very comfortable even on long journies.
The seats on the F30 seem to be narrower and thinner. Not doing my back any good
A question for the technically minded, would it be possible to fit a seat from an E9X.
I am not worried about the aesthetics, just want to finish a journey pain free