188.8.131.52. Auxiliary brake system
If you sharply press brakes, the auxiliary brake system will regard it as the emergency emergency stop and will provide the strengthened braking, helping the driver who will not be able strongly to hold a brake pedal.
If you sharply strike brakes, more powerful brake effort will be made. At this time you can hear a sound in a compartment of the engine and feel vibration of a pedal of a brake. It does not indicate malfunction.
The auxiliary brake system turns on when the car begins to move with a speed over about 10 km/h. It is disconnected when the car is slowed down to speed below about 5 km/h.