BMW 535i Owner's Manual page 52

Pull the lever and slide the seat in the desired
direction.
After releasing the level, move the seat forward
or back slightly until it engages.
Backrest tilt:
Pull the lever and apply your weight to the back‐
rest or lift it off.
At a glance: power* seats
1 Forward/backward
2 Shoulder support
3 Backrest, head restraint
The seats cannot be adjusted if the safety
switch for the power windows has been
pressed.
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Adjustments in detail: power* seats
1. Forward/back.
2. Backrest tilt.
3. Head restraint.
Shoulder support*
Also supports the back in the shoulder area:
▷ Results in a relaxed seating position.