Active seat
Active adjustment of the seat cushion's contours reduces muscular tension and fatigue to help prevent lower back pain.

Press the button. The LED
lights up.
See also:
Inserting/removing the snap-in adapter
1. Press button 1 and remove the cover.
2. Insert the snap-in adapter at the front, arrow
1, and press down, arrow 2, until it engages.
To remove the snap-in adapter: press button 1.
Insert ...
Shoulder support
Also supports the back in the shoulder area:
Results in a relaxed seating position.
Reduces strain on the shoulder muscles.
...
Under the Hood
The 528i has a 240-horsepower, 3.0-liter six-cylinder, while the 535i gets a
300-hp, turbocharged 3.0-liter six-cylinder. The 550i has a twin-turbo,
4.4-liter V-8 that makes 400 hp. All three use ...
