Cruise control may be unable to maintain the
stored speed on uphill gradients. The stored
speed is resumed if the uphill gradient evens out
and the vehicle's speed does not fall below
20 mph (30 km/h). Cruise control maintains the
stored speed on downhill gradients by automat-
ically applying the brakes. Observe the addi-
tional driving tips (
Y
page 137).
Important safety notes
Observe the notes on braking (
Y
page 137).
If you fail to adapt your driving style or if you are
inattentive, cruise control can neither reduce
the risk of an accident nor override the laws of
physics. Cruise control cannot take road,
weather and traffic conditions into account.
Cruise control is only an aid. You are responsible
for the distance to the vehicle in front, for vehi-
cle speed, for braking in good time and for stay-
ing in lane.
If you change wheel size, make sure they corre-
spond to the correct wheel size category
(
Y
page 268). If the category is changed without
recoding the control units in the vehicle, the
functioning of cruise control may be impaired.
Do not use cruise control:
R
in traffic conditions that are unsuitable for
driving at a constant speed, e.g. in heavy traf-
fic, on winding roads or off-road.
R
on slippery roads. Braking or accelerating
may cause the drive wheels to lose traction
and the vehicle could then skid.
R
when there is poor visibility, e.g. due to fog,
heavy rain or snow.
If there is a change of drivers, make sure that
you inform the new driver about the set cruise
speed.
Cruise control lever and display
:
To activate and store the current speed or a
higher speed
;
To activate at the last stored speed
=
To activate and store the current speed or a
lower speed
?
To deactivate cruise control
The cruise control lever is the lower lever on the
left of the steering column.
When you activate cruise control, the display
briefly shows the
Cruise Control
Cruise Control
message
and the stored speed.
The display also shows the
V
symbol and the
stored speed:
R
in the header on vehicles without steering
wheel buttons (
Y
page 171)
R
in the status area on vehicles with steering
wheel buttons (
Y
page 177)
Activation conditions
To activate cruise control, all of the following
activation conditions must be fulfilled:
R
the parking brake must be released. The
F
(only USA) or
J
(only Canada) indicator
lamp in the instrument cluster goes out
R
ESP
®
must be switched on, but not currently
intervening or performing a control action
R
you are driving faster than 20 mph (30 km/h)
R
the brake pedal is not depressed
142
Driving systems
Dri
vi
ng
and
parkin
g
