I just sold me 328D. Did not like that car due to low seating position, small mirrors, and boring seats (It was non sport). Also steering from 2104 was twitchy (over sensitive). I am a TDI fan so wondering if you have any suggestions on the 540D. Is it a more comfortable ride than the 3 series? Are the sport seats on a 540D the same as the 328D? I did not like sport seats on that car either since the bolsters on the bottom cushion were very firm and dug into my thigh. Worried the ride on the 5 series will be stiff but not sure? How about MPG for those of you that have the Diesel? Also, if anyone has lane keep assist (Separate option from Driver Assistance) how long will it stay in auto mode before disengaging and requiring you to takeover steering? My A6 TDI does that in only 7-10 seconds. Also anyone have an A6 to compare ride quality to the 5 series?