 Just turned in a 2015 5 series sedan and replaced with a 2018 S series with similar options. The bucket seats are very uncomfortable, with poor lower back support. I wish I noticed on the quick test drive. After a 50 minute drive, had an aching back. Is it me, or do these cars have way too much technology in them? Maybe BMW was too busy tweaking the tech to realize the front seats are horrible?  I will probably need to get something to modify the seat so it is bearable on road trips over an hour.