| ABS |
Antilock Brake System. Control module for cars anti lock braking system. |
| AF |
Alternative Frequency. Automatic search for alternative frequency for selected radio channel. |
| AM |
Amplitude Modulation a method used to transmit information using radio waves. |
| ASC |
Automatic Sound Control. Automatic volume control that adjusts volume to the car speed. |
| Audio control module |
Audio Module. Audio system control module. Integrated in the head unit. |
| AUTO |
Automatic search for radio stations on selected waveband. |