Version without car phone:

1. Remove storage tray, refer to REMOVING AND INSTALLING STORAGE TRAY  .
2. Remove insert in storage tray, refer to REPLACING LEFT OR RIGHT OUTSIDE MIRROR HOUSING 
3. Version with cup holder:
4. Remove front cup holder, refer to REMOVING AND INSTALLING/REPLACING FRONT CUP HOLDER  .

Press switch for hazard warning lights/central locking from below out of storage tray (1).

Fig 1: Pressing Switch For Hazard Warning Lights/Central

Courtesy of BMW OF NORTH AMERICA, INC.