Concept
This system assists the driver by automatically setting and releasing the brake, such as when moving in stop-and-go traffic.
The vehicle is automatically held in place when it is stationary.
On uphill grades the system prevents the vehicle from rolling backward when driving off
General information
Under the following conditions, the parking brake is automatically engaged:
Display
The indicator light changes from
green
to red.
Safety information
Warning
An unsecured vehicle can begin to move and possibly roll away. There is a risk of accident.
Before exiting, secure the vehicle against rolling.
In order to ensure that the vehicle is secured against rolling away, follow the following:
Warning
Unattended children or animals in the vehicle can cause the vehicle to move and endanger themselves and traffic, for instance due to the following actions:
There is a risk of accidents or injuries. Do not leave children or animals unattended in the vehicle.
Take the vehicle key with you when exiting and lock the vehicle.
NOTICE
If the vehicle is stationary, Automatic Hold engages the parking brake and prevents the vehicle from rolling in a car wash. There is a risk of damage to property. Deactivate Automatic Hold prior to entering the car wash.
Overview
Automatic Hold
Establishing function readiness of Automatic Hold
The LED lights up.
The indicator light lights up
green.
Automatic Hold is functional.
After every new vehicle start, the last selected setting is active.
Automatic Hold holding the vehicle
Function readiness is established and the driver's door is closed.
After stepping on the brake pedal, for instance when stopping at a traffic light, the vehicle is automatically secured against rolling.
The indicator light lights up
green.
Driving off
Step on the accelerator pedal to drive off.
The brake is released automatically and the indicator light of the parking brake is no longer illuminated.
Activating the parking brake automatically
The parking brake is automatically set if driveready state is switched off while the vehicle is being held by Automatic Hold or if the vehicle is exited.
The indicator light changes from
green
to red.
The parking brake is not set automatically, if the drive-ready state is switched off, while the vehicle is coasting to a halt. Automatic Hold is deactivated.
Switching function readiness off
Press the button.
The LED goes out
The indicator light goes out.
Automatic Hold is switched off.
If the vehicle is being held by Automatic Hold, press additionally on the brake pedal, when switching off.
Malfunction
If the parking brake fails or malfunctions, secure the vehicle against rolling before exiting.
A Check Control message is displayed.
Secure the vehicle against rolling away, for instance with a wheel chock, after exiting the vehicle.
After a power failure
To reestablish parking brake functionality after a power failure:
This process may take a few seconds. Some mechanical sounds associated with this process are normal.
The indicator light is no longer
illuminated
as soon as the parking brake is
ready for operation again.