MSA function is deactivated by

Deactivate MSA by means of button (1) in passenger compartment.
Open seat belt buckle and driver's door.

Fig 1: Identifying MSA Button
Courtesy of BMW OF NORTH AMERICA, INC.
Open engine bonnet/hood and ensure that engine hood/bonnet contact is not in workshop mode.
- Workshop mode
  1. = 10 mm
- Basic setting (engine hood/bonnet open)
  1. B = 7 mm
Fig 2: Identifying Workshop Mode And Basic Setting (Engine Hood/Bonnet Open) Dimension
Courtesy of BMW OF NORTH AMERICA, INC.

To make sure that the engine hood/bonnet contact is at the basic setting, if necessary press the hood/bonnet contact up to the limit position before starting work and slowly release.