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Driving
The Auto Hold function is automatically
t
urned off if the following conditions are
met:
If any of the conditions mentioned on
›››
page 277, Conditions for keeping
the vehicle stationary with the Au-
to Hold function are no longer met.
If the engine is running irregularly or an
anomaly is detected.
If the engine is turned off or stalls.
Manual gearbox: The clutch and the ac-
celerator are pressed at the same time.
Automatic gearbox: If the accelerator is
pressed
Automatic gearbox: If any of the tyres
has only minimal contact with the
ground, e.g. in the case of axle articula-
tion.
WARNING
The smart technology incorporated into
the Aut
o Hold function cannot defy the
laws of physics; it only works within the lim-
its of the system. The greater convenience
provided by the Auto Hold function should
never tempt you to take any risk that may
compromise safety.
●
Never leave the vehicle running and with
the Auto Hold function switched on.
●
The Auto Hold function cannot always
keep the vehicle stationary uphill or down-
1.
2.
3.
4.
5.
hill or stop it sufficiently, for example, on
slippery or fr
ozen surfaces.
Note
Before entering a car wash, always switch
off the Aut
o Hold function, because if the
electronic parking brake is automatically
connected, it may cause damage.
Stabilisation and brake as-
sist
ance systems
Control lamps
It lights up
Fault in the ESC or ABS, or disconnection caused by
the syst
em.
The ESC works in combination with the ABS. If the
ABS fails, the lamp also lights up.
Flashes
ESC or ASR activated.
It lights up
ASR switched off manually.
Or: ESC in Sport mode
›››
page 280.
It lights up
ABS faulty or does not work.
WARNING
When the ignition is switched on, the status
of the br
ake system and the brake assist
functions is automatically checked. The
control lights on the instrument cluster
light up briefly and then turn off again. If a
warning light stays on permanently, there
is a fault. Seek qualified technical assis-
tance immediately.
Brake assist systems
Electronic Stability Control (ESC)
The ESC helps t
o improve safety. It reduces
the tendency to skid and improves the stabili-
ty and roadholding of the vehicle. The ESC
detects critical handling situations, such as
vehicle understeer or oversteer, or wheelspin
on the driving wheels. It stabilises the vehicle
by braking individual wheels or by reducing
the engine torque. The warning lamp will
flash on the instrument panel when the ESC is
intervening .
The ESC includes the anti-lock brake system
(ABS), the hydraulic brake assist (HBA), the
traction control system (ASR), electronic dif-
ferential lock (EDS), electronic torque control
(XDS) and tractor-trailer sway mitigation.
278
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