BMW X5: PostCrash - iBrake

Principle

In the event of an accident, PostCrash can bring the vehicle to a halt automatically without intervention by the driver in certain situations.

General information

PostCrash can reduce the risk of another collision and subsequent consequences.

At standstill

After coming to a halt, the brake is released automatically.

Harder vehicle deceleration

In certain situations, it can be necessary to bring the vehicle to a halt more quickly than the Brake Assistant allows.

To do this, quickly apply extra force to the brake.

For a brief period, the braking pressure will be higher than the braking pressure that is achieved by the automatic braking function. Automatic braking is interrupted.

Interrupting automatic braking

It can be necessary to interrupt automatic braking in certain situations, for instance for an evasive maneuver.

Interrupt automatic braking:

• By pressing the brake pedal.
• By pressing the accelerator pedal.

Fatigue alert

Principle

The Fatigue Alert can detect decreasing alertness or fatigue of the driver during long, monotonous trips, for instance on highways. The system recommends a break.

Safety information

Warning

The system cannot serve as a substitute for the driver's personal judgment in assessing one's physical state. An increasing lack of alertness or fatigue may not be detected or not be detected in time. There is a risk of accident. Make sure that the driver is rested and alert. Adjust driving style to traffic conditions.

Function

The system is switched on each time drive-ready state is switched on.

After travel has begun, the system monitors certain aspects of the driver's behavior, so that decreasing alertness or fatigue can be detected.

This procedure takes the following criteria into account:

• Personal driving style, for instance steering behavior.
• Driving conditions, for instance time, length of trip.
• Depending on the equipment: attention of the driver through the Driver Attention Camera.

Starting at approx. 43 mph/70 km/h, the system is active and can also display a recommendation to take a break.

Break recommendation

Adjusting

The fatigue alert is active automatically with each switching on of drive-ready state and can thus display a break recommendation.

The break recommendation can also be switched on or off and adjusted via iDrive.

1. "CAR".

2. "Settings".

3. "General settings".

4. "Fatigue and Focus Alert".

5. Select the desired setting.

Display

If the driver becomes less alert or fatigued, a message is displayed in the Control Display with the recommendation to take a break.

During the display, various settings can be selected.

After a break, another recommendation to take a break cannot be displayed until after approximately 45 minutes.

System limits

The function may be limited in the following situations and may issue an incorrect warning or no warning at all:

• When the time is set incorrectly.
• When the vehicle speed is mainly below about 43 mph/70 km/h.
• With a sporty driving style, such as during rapid acceleration or when cornering fast.
• In active driving situations, such as when changing lanes frequently.
• When the road condition is poor.
• In the event of strong side winds.

The system is reset approx. 45 minutes after parking the vehicle, for instance in the case of a break during longer trips on highways.

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