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144 Driving
The warning lamp lights up when the handbrake is applied with the ignition
on .
Stability system (ESC)
Fig. 103 ESC system:
ASR switch
The ESC system increases control of the vehicle in emergency situations,
e.g. during a sudden change in direction. Depending on the driving condi-
tions, it reduces the risk of skidding and increases driving stability.
The system uses the steering wheel angle and road speed to calculate the
changes of direction desired by the driver, and constantly compares them
with the actual behaviour of the vehicle. When irregularities occur, for exam-
ple, if the vehicle begins to skid, the ESC brakes the appropriate wheel au-
tomatically.
The warning lamp in the general instrument panel starts flashing when
the system is working.
The stability (ESC) system includes the following systems:
● Anti-lock brake system (ABS)
● Traction control system (ASR)
● Electronic differential lock (EDL)
● Brake assist system (HBA)
● Hill hold control (HHC)
The ESC system cannot be switched on. The
⇒ Fig. 103 button can only
be used to switch off the ASR system. The warning lamp lights up on the
general instrument panel if the ASR system is switched off.
The ASR should be switched on at all times. Only under certain circumstan-
ces should the system be switched off, e.g.
● Driving with chains
● Driving in deep snow or on very soft surfaces
● During the “swinging movement” required to remove a stuck vehicle
Switch the ASR back on as soon as possible.
Brake assist system (HBA)*
The HBA system is activated when you press down on the brake pedal sud-
denly. It increases braking power, helping to reduce braking distances. To
reduce the braking distance as much as possible, keep the brake pedal
pressed down firmly until the vehicle comes to a standstill.
With the help of this system, the ABS is activated more quickly and more
efficiently.
The brake assist function is deactivated automatically when the brake pedal
is released.
Hill hold control (HHC)*
The HHC system makes it easier to start the vehicle on hills. The system
maintains the brake pressure created by pressing down on the brake pedal
for 2 seconds after it has been released. Your foot can be removed from the
brake pedal and you can use the accelerator pedal and move away on a hill
without having to use the handbrake. The brake pressure drops as the ac-
celerator pedal is pressed. If the vehicle is not started then it will start to
move backwards after two seconds.
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