- external lighting;
- illumination of the engine compartment and trunk;
- interior lighting;
- emergency light signaling;
- illumination of a combination of devices;
- illumination of inscriptions;
- operation of switches, controls and regulators;
- fan operation at all air supply speeds;
- operation of dampers for air distribution;
- operation of the sound signal;
- operation of the on-board computer;
- operation of audio equipment and additional equipment.