They are great, very useful if you have more than yourself that drives the car.
I had a couple of settings for getting in and out the car so not to rub the bolsters so much causing unwanted wear.
Now there were a couple of times when I felt that the seats were not functioning right and that it had forgotten the positions.
After posting a question on the Bimmerforums I was informed as to how they actually work!
Saving a setting
To save a setting on them get the mirrors and seat into the position you desire.
Press the big red button and it will light up. Now press the number you want to assign it to (one to three).
To retrieve settings
Either put the key in the ignition and turn to position one then press the number you desire. The seats will automatically move and the mirrors will adjust too.
You can also do this without the key in, however the door MUST be open.
While the engine is running you must hold down the number you want to adjust. I assume this is done so you don't crush yourself with your seatbelt on.
If you go to a BMW dealer you can have it set to go to position one when the car is unlocked.
