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shop. This also applies to collisions at slow
speeds where there is no visible damage to the
front end of the vehicle.
Setting Active Brake Assist
On-board computer:
DriveAssist
Active Brake Assist
4
5
Select the desired setting for the warning/
#
reaction time and press the a button.
The setting is retained when the vehicle is
next started.
Deactivating Active Brake Assist
%
It is recommended that Active Brake Assist is
always left activated.
Select
Off
and press the a button.
#
The distance warning function and the auton‐
omous braking function are deactivated. Also,
the status appears in the Status overview of
the
DriveAssist
menu.
The next time the vehicle is started, Active Brake
Assist is automatically activated with the
setting.
When Active Brake Assist is activated, the multi‐
function display shows the Ä symbol.
At speeds up to approximately 20 mph
(30 km/h), the multifunction display in vehicles
with Active Parking Assist first shows the j sta‐
tus indicator. Only from a speed of approximately
20 mph (30 km/h) does the multifunction display
show the j symbol instead of the Ä status
indicator.
Cruise control
Function of cruise control
Cruise control accelerates and brakes the vehicle
automatically in order to maintain a previously
stored speed.
If you accelerate to overtake, for example, the
stored speed is not deleted. If you remove your
foot from the accelerator pedal after overtaking,
cruise control will resume speed regulation back
to the stored speed.
You operate cruise control using the cruise con‐
trol lever. You can store any speed above 20 mph
(30 km/h).
Observe the notes on driving systems and your
responsibility, otherwise you cannot recognize
dangers (
page 109).
/
System limits
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).
On long and steep downhill gradients, you should
change down to a lower gear in good time. Take
particular note of this when driving a laden vehi‐
cle. By doing so, you will make use of the
engine's braking effect. This will take some of the
strain off the brake system and prevent the
brakes from overheating and wearing too quickly.
If you change wheel size on your vehicle, check it
is assigned to the correct wheel size category
(
/
page 218). If the category is changed without
recoding the control units in the vehicle, the func‐
tioning of cruise control may be impaired.
Do not use cruise control in the following situa‐
tions:
in traffic situations where frequent speed
R
changes are required, e.g. in heavy traffic or
on winding roads
Medium
off-road or on construction sites
R
on slippery or slick roads, as the drive wheels
R
can lose traction when accelerating and the
vehicle can then skid
if there is poor visibility
R
Operating cruise control
Requirements
Cruise control is selected.
R
The parking brake has been released.
R
®
ESP
is activated, but may not intervene.
R
The driving speed is at least 20 mph
R
(30 km/h).
The brake pedal is not depressed.
R
Driving and parking 115
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