Originally Posted by vantagesc
I would want the sport seats, but that's up to you.
1) No. Installing the M pieces is just something people figured out, it's not part of any official BMW program.
2) Correct. Though at least on the 135i, if you are starting with the sports suspension, then the cost of the PS is a little less b/c you don't have to replace the rear anti-roll bar.
Agreed -- thankfully sports seats are an "a la carte" option ($500 MSRP)