I know a lot of people have said both positive and negative things about the phone app and auto lock/unlock, and the key card. One feature on my current car that I use A LOT is a exterior button that I can push that will lock/unlock as long as the FOB is near the car. This would be a nice to have feature too on the M3 so you don't have to use the auto feature or pull out the app/card to press to unlock/lock. Now, if bluetooth is still acting up, it may not work perhaps.