Anti-lock braking system (ABS system)
The ABS system prevents the wheels from locking when braking and increases the level of active vehicle safety. Even with the brake pedal fully depressed, control over the car is not lost. The ABS system also has the functions of an electronic brake force distribution system (EBV).
The advantages of the ABS system are most pronounced when the brake pedal is depressed to the maximum. The pulsation of the brake pedal, combined with the noise that the hydraulic system makes during operation, signal that the braking process is under the control of the ABS system.
Brake force distribution system
The EBV system regulates the pressure in the brake cylinders of the rear wheels, ensuring braking stability.
Dynamic Brake Control System
The DBC system actively supports the driver when braking in a dangerous situation. With a sharp press on the brake pedal, the system increases the braking effect even with a slight effort on the pedals, which allows you to minimize the braking point. In this case, all braking systems are activated.
As long as braking is required, do not loosen the pressure on the brake pedal. When the brake pedal is released, the DBC system is disabled.
Dynamic Stability Control
Dynamic Stability Control (DSC) maintains vehicle stability at the proper level even in critical situations and is ready for operation immediately after starting the engine. When starting off and accelerating, the system improves vehicle stability. It also detects critical situations such as understeer or oversteer. and a reduction in engine power and a braking effect on individual wheels gives the vehicle directional stability within physical limits.
Attention! The DSC system does not change the laws of physics, so the responsibility for choosing the right driving style rests entirely with the driver.
The DSC system indicator lights up when the engine is started, and goes out almost immediately. A blinking DSC system indicator indicates that the system is activated and is in the mode of controlling engine torque and brake pressure. The system can be turned off by pressing the key (arrow, fig. 1.56), while the indicator is constantly on and the DSC system does not have a stabilizing effect on the car, but the braking effect of other systems remains.
Briefly disabling the DSC system may be useful in the following non-routine situations:
- when leaving in buildup from deep snow or loose soil;
- when driving on a sandy road;
- when driving on a road with a deep rut;
- when driving through deep mud;
- when driving with snow chains.
The impact on the brake mechanism when the system is on may be an additional burden for it. To prevent overheating of the brake discs, a short-term automatic shutdown of the braking effect is possible. To maintain vehicle stability at the proper level, it is not recommended to disable the DSC system. To turn on the DSC system, press the button again.
All-wheel drive system «xDrive»
All-wheel drive system» xDrive» designed to redistribute torque between the front and rear axles and complements the work in conjunction with the DSC system. Their interaction leads to increased traction on the wheels and improved driving dynamics. All-wheel drive system» xDrive» flexibly distributes traction forces along the axles, taking into account the traffic situation and the nature of the road surface.
Hill Descent Control
Stability System (NOSE) controls the movement of the car during its descent, reducing speed and thereby ensuring traffic safety.
The HDC system is switched on by pressing the HDC key (pic. 1.57), while the vehicle speed must be less than 35 km/h.
Without any intervention from the driver, the car slows down on the descent and begins to move at a speed of about 8 km / h. This speed can be adjusted between 5 km/h and 25 km/h by pressing the brake or accelerator pedal. At speeds above 60 km/h, HDC is automatically deactivated and its indicator goes out. The system is reactivated by pressing the button, the system is also deactivated after the ignition is switched off.
On vehicles equipped with a manual transmission, the HDC system should only be engaged in first gear and reverse gear. In higher gears, the effect of engine braking is reduced. On vehicles equipped with automatic transmission, the HDC system can be activated in any situation.
Attention! If the indicator goes out in HDC operation mode or does not light up when a key is pressed and the indicator lights up «ABS, DSC and xDrive systems», the HDC system cannot be used temporarily, due to the possible overheating of the brakes. You should contact the service station.