1. - Alarm horn - H12-
   • Removal and installation
2. - Bracket for alarm horn - H12-
   • Retaining nuts, 7 Nm
3. - Nut
   • 7 Nm
4. - Individual sensor for interior monitor (left-side)
   • Can only be renewed together with anti-theft alarm sensor - G578-
   • Removal and installation
5. - Individual sensor for interior monitor (right-side)
   • Can only be renewed together with anti-theft alarm sensor - G578-
   • Removal and installation
6. - Front roof module - WX3-
   • Removal and installation
7. - Anti-theft alarm system sensor - G578-
   • Removal and installation
8. - Button deactivation of interior monitor and vehicle tilt - E616-
   • Removal and installation
9. - Onboard supply control unit - J519-
   • With central locking and anti-theft alarm system aerial - R47-
   • Assembly overview
10. - Bracket/bearing/support
    • for the onboard supply control unit

Alarm horn - H12- : removing and fitting

Removing

• Switch off ignition and all electrical consumers.

Vehicles without access and start authorisation system

• Remove ignition key, if fitted.

Vehicles with access and start authorisation system

• Store the ignition key outside the vehicle to prevent the ignition from being switched on unintentionally.

Continued for all vehicles

• Remove plenum chamber cover.
• Remove nut -1-.
• Remove the alarm horn -2- from the bracket.
• Pull out the plug -3-.
• Remove the alarm horn -2-.

Installing

Installation takes place in reverse order.