5.4.5. System of smooth switching (ARA)
This system is installed on cars with the mechanical transmission. The electromagnet on TNVD at the right time minimizes fuel supply, thereby preventing "blows" when switching. The electromagnet copes from the control unit. Via the starter gear wheel RPM meter the block "distinguishes" fluctuations of speed at each separate turn of the motor.
If in the electrical system there are mistakes, the control unit defines them and writes down in memory for diagnostics in auto repair shop. Further at Mercedes-Benz car repair shop by means of test connection the system is optimized. It is specially provided for elimination of beats and rigid switching.