Table of Contents
Advertisement
HOLD function: Standstill
management
The HOLD function, as an assistance function,
supports the driver when stopping the vehicle and
driving off on steep gradients.
The vehicle is stopped and prevented from rolling
back away from the desired direction of travel
even without pressing the brake.
The HOLD function is only available in operating
mode D, R or M.
When the HOLD function is active, the light indica-
tor
on the instrument cluster comes on.
When adaptive cruise control is operating nor-
mally, the HOLD function actively holds the vehicle
at a standstill following automatic braking.
If the driver's seat belt is unfastened and the driv-
er's door is opened while the HOLD function is ac-
tive, the electric parking brake is activated
automatically. Driving off in the normal manner is
also possible when the HOLD function is activated.
Information
If the electric parking brake is used to hold the ve-
hicle on the gradient, you can drive off in the usual
way.
The electric parking brake detects the start re-
quest and is automatically released.
> Please see chapter "Brakes" on page 69.
Information
The HOLD function is disabled.
– In P and N operating modes: If the PDK operat-
ing mode is changed while the HOLD function is
active, the HOLD function is deactivated.
– If the vehicle is not stationary:
– If the engine has been switched off manually.
– On gradients of less than 5%.
– If the driver's door is opened and the driver's
seat belt is not fastened.
– If the pressure on the brake pedal is
insufficient.
Information
The HOLD function can be activated, irrespective
of the gradient, by flooring the pressed brake ped-
al while the vehicle is stationary. This keeps the
vehicle at a standstill without the brake pedal hav-
ing to be pressed continuously. A quick change of
the selector-lever transmission range position
does not deactivate the HOLD function in this case.
Slight rolling back on
WARNING
uphill slopes.
If the vehicle comes to a standstill on steep gra-
dients without the driver applying the footbrake,
the vehicle can roll back until the HOLD function
stops it. In this situation it is possible to reduce the
roll-back by applying the footbrake.
e Assist holding of the vehicle by increasing the
braking force with the footbrake.
H H O O L L D D f f u u n n c c t t i i o o n n : : S S t t a a n n d d s s t t i i l l l l m m a a n n a a g g e e m m e e n n t t
Information
When the HOLD function is active, the driver may
feel a difference in the brake pedal and hydraulic
noises may be heard.
This behavior is typical of the system. There is no
fault.
Loss of control over the
WARNING
vehicle
Despite the HOLD function, responsibility for stop-
ping and starting on gradients lies with the driver.
When stopping and starting on slippery surfaces
(e.g., icy or loose substrate) the HOLD function
cannot be guaranteed to provide assistance. In
this case, the vehicle can slip.
e Always adjust your driving style to the road
surface and the vehicle load; use the footbrake
if necessary.
If the HOLD function is not working, the driver
cannot be assisted when driving off on hills:
e Hold the vehicle with the footbrake.
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
119
Advertisement
Table of Contents
