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longed rolling of the wheels, e.g. when being
towed, will result in transmission damage.
If the vehicle threatens to skid or cannot be
stopped when moving at low speed:
XShift the transmission to neutral position N.
XTry to maintain control of the vehicle using
corrective steering.
Drive particularly carefully on slippery roads.
Avoid sudden acceleration, steering and braking
maneuvers. Do not use cruise control.
You can find further information on winter tires
and snow chains in the "Winter operation" sec-
tion (
Ypage 245).
Driving off-road
Important safety notes
GWARNING
If you drive on a steep incline at an angle or
turn when driving on an incline, the vehicle
could slip sideways, tip and rollover. There is a risk of an accident.
Always drive on a steep incline in the line of
fall (straight up or down) and do not turn the
vehicle.
GWARNING
When driving off-road, your body is subject to
forces from all directions, due to the uneven
surface. You could be thrown from your seat,
for instance. There is a risk of injury.
Always wear a seat belt, even when driving off-
road.
GWARNING
If you drive over obstacles or in ruts, the steer-
ing wheel may jerk out of your grip, causing
injury to your hands.
Always hold the steering wheel firmly with
both hands. When driving over obstacles, you
must expect steering forces to increase
briefly and suddenly.
GWARNING
Flammable material such as leaves, grass or
twigs may ignite if they come into contact with
hot parts of the exhaust system. There is a risk of fire.
When driving off road or on unpaved roads,
check the vehicle's underside regularly. In
particular, remove parts of plants or other
flammable materials which have become
trapped. In the case of damage, contact a
qualified specialist workshop.
!When driving off-road or on unpaved surfa-
ces, check the underside of the vehicle and
the wheels and tires at regular intervals. In
particular, remove any trapped foreign
objects, e.g. stones and branches.
Such foreign objects may:
Rdamage the chassis, the fuel tank or the
brake system
Rcause imbalances and thus vibrations
Rbe flung out when you continue driving
If there is any damage, inform a qualified spe-
cialist workshop.
When driving off-road and on construction sites,
sand, mud and water mixed with oil, for exam-
ple, may get into the brakes. This may lead to a
reduction in braking performance or total brake
failure, also as a result of increased wear. The
braking characteristics will vary depending on
the material that has got into the system. Clean
the brakes after driving off-road. If you then
notice reduced braking performance or hear
scraping noises, have the brake system checked
at a qualified specialist workshop. Adjust your
driving style to the changed braking character-
istics.
Driving off-road or on construction sites increa-
ses the possibility of vehicle damage which may
in turn lead to the failure of certain assemblies
and systems. Adapt your driving style to the off- road driving c
onditions. Drive carefully. Have
any vehicle damage rectified at a qualified spe-
cialist workshop as soon as possible.
When driving on rough terrain, do not shift the
transmission into the neutral position. You could
lose control when attempting to brake the vehi-
cle with the service brake. If your vehicle cannot
manage an uphill slope, drive back down the
slope in reverse gear.
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When loading your vehicle for driving off-road or
on a construction site, keep the vehicle's centerof gravity as low as possible.
Checklist before driving off-road
XCheck the fuel and DEF levels (Ypage 159)
and top up (Ypage 126).
XEngine: check the oil level (Ypage 216) and
add oil (Ypage 218).
Before driving up or down steep gradients, fill
the oil to the maximum level.
iIf you drive up or down steep gradients, the
4 symbol may appear in the display. The
engine operating safety is not put at risk if you
have filled the engine oil to the maximum level
before the journey.
XVehicle tool kit: check that the jack is work-
ing (Ypage 236).
XMake sure that a lug wrench (Ypage 236),
wooden underlay for the jack, a robust tow
cable and a folding spade are carried in the
vehicle.
XWheels and tires: check the tire tread depth
(Ypage 244) and tire pressure
(Ypage 246).
Rules for driving off-road
!Always bear the vehicle's ground clearance
in mind and avoid obstacles, e.g. deep ruts.
Obstacles may damage the following parts of
the vehicle:
Rthe chassis
Rthe drive train
Rthe fuel and supply tanks
For this reason, you should always drive
slowly when driving off-road. If you have to
drive over obstacles, have the front
passenger direct you.
iWe recommend that you additionally carry a
shovel and a recovery rope with shackle in the
vehicle.
REnsure that loads and items of luggage are
securely stowed or lashed down
(
Ypage 208).
RBefore driving off-road, stop the vehicle and
shift to a low gear.
RIf the surface demands it, temporarily deacti-
vate ASR when pulling away (Ypage 54).
ROnly drive off-road with the engine running
and a gear engaged.
RDrive slowly and smoothly. Walking pace is
necessary in many situations.
RAvoid spinning the drive wheels.
RMake sure that the wheels always remain in
contact with the ground.
RDrive with extreme care over unknown terrain
where you can only see for a short distance.
As a precaution, get out of the vehicle to take
a look at the route to be taken in advance.
RCheck the water depth before fording.
RWatch out for obstacles (e.g. rocks, holes,
tree stumps and ruts).
RAvoid edges where the surface could crumble
or break away.
Checklist after driving off-road
!If you detect damage to the vehicle after
driving off-road, have the vehicle checked
immediately at a qualified specialist work-
shop.
Off-road driving places a higher demand on your
vehicle than normal road operation. Check your
vehicle after driving on rough terrain. By doing
so you will notice any damage in good time and
reduce the risk of an accident for yourself and
other road users. Clean your vehicle thoroughly
before driving on public roads.
Observe the following points after driving off-
road, on construction sites and before driving on
public roads:
XVehicles with all-wheel drive: deactivate
all-wheel drive (Ypage 145).
XActivate ASR (Ypage 54).
XClean the headlamps and tail lamps and
check them for damage.
XClean the front and rear license plates.
XClean the windshield, windows and exterior
mirrors.
XClean the steps, door sills and grab handles.
This increases safety of footing.
XClean the wheels and tires, wheel arches and
the underbody of the vehicle with a water jet.
This increases road grip, especially on wet
road surfaces.
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XCheck the wheels and tires and wheel archesfor trapped foreign objects and remove them.
Trapped foreign objects can damage the
wheels and tires or may beflung out from the
veh icle when you continue driving.
XCheck the underbo dyfor trapped branches or
other parts of plants and remove them.
XClean the brake disks, brake padsand axle
jo ints, particular lyafter operation insand,
mud, grit and gravel, water or similarly dirt y
conditions.
XCheck the entire floor assembly, the tires,
wheels, bodywork structure, brakes, steering,
chassis and exhaust system for any damage.
XCheck the service brake for operating safety,
e.g. carry out a brake test.
XIf you notice strong vibrations after driving off-
road, check the wheels and drive train for for-
eign objects again. Remove any foreign
objects which can lead to imbalances and
thus cause vibrations.
Driving systems
Cruise control
General notes
Cruise control maintains the speed of the veh i-
cle for you.
Use cruise control ifroad and traff icconditions
make itappropriate to maintain a steady speed
for a prolonged period. You can set any speed
from 20 mph upwards inincrements of 1 mph.
iIfyou have set km /has the unit for the dig-
ital speedometer (Ypage 167), you can set
any speed from 30 km /hupwards inincre-
ments of 1 km/h.
Cruise control should not beactivated when
driv ing off-road or on construction sites.
Cruise control may not be ableto maintain the
stored speed on uphillordownhill gradients. If
the gradient evens out and the veh icle's speed
does not fall below 20 mph (30 km/h), the
stored speed is resumed.
iThe speed shown in the speedometer may
differ slightly from the speed stored by cruise
control.
Important safety notes
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.
Do not use cruise control:
Rin traffic conditions that are unsuitable for
driving at a constant speed, e.g. in heavy traf-
fic, on winding roads or off-road.
Ron slippery roads. Braking or accelerating
may cause the drive wheels to lose traction
and the vehicle could then skid.
Rwhen 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
Operating cruise control
: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 upper lever on the
left of the steering column.
Displaying the cruise control speed
Vehicles with steering wheel buttons: when
you activate cruise control, the text field in the
display briefly shows the speed
limitmessage
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and the stored speed. The status area of the
display then shows theVsymbol and the
stored speed.
Vehicles without steering wheel buttons:
when you activate cruise control, the display
briefly shows the Vsymbol and the stored
speed.
Activation conditions
To activate cruise control, all of the following
activation conditions must be fulfilled:
Rthe parking brake must be released. The c
indicator lamp in the instrument cluster is off
Ryou are driving faster than 20 mph (30 km/h)
Rneither the brake or clutch pedal is depressed
iOther drive and brake systems not descri-
bed in this Operator's Manual, such as a
retarder, may affect cruise control. You can
find information on this in the separate oper-
ating instructions provided by the body man-
ufacturer.
Storing and maintaining the current
speed
XAccelerate the vehicle to the desired speed
above 20 mph (30 km/h).
XBriefly push the cruise control lever up :or
down ?.
XRelease the accelerator pedal.
Cruise control is activated. The current speed
is stored.
The display shows the Vsymbol and the
stored speed.
Resuming the stored speed
GWARNING
If you call up the stored speed and it differs
from the current speed, the vehicle acceler-
ates or decelerates. If you do not know the
stored speed, the vehicle could accelerate or brake unexpectedly. There is a risk of an acci-
dent.
Pay attention to the road and traffic condi-
tions before calling up the stored speed. If you
do not know the stored speed, store the
desired speed again.
XBriefly pull the cruise control lever towards
you =.
XRelease the accelerator pedal.
Cruise control is activated and resumes the
vehicle's speed to the last speed stored.
The display shows the Vsymbol and the
stored speed.
iWhen you pull the cruise control lever
towards you for the first time after starting the
engine, cruise control adopts the current
speed.
Setting the speed
It may be a moment before the vehicle starts to
accelerate or brake to the set speed. Take this
delay into account when setting the speed.
XBriefly push the cruise control lever up :to
increase the speed or down =to reduce the
speed.
The last stored speed increases or decreases
in 1 mph increments (1 km/h increments).
or
XPress and hold the cruise control lever up :
or down =until the desired speed has been
reached.
XRelease the cruise control lever.
The current speed is stored.
The display shows the Vsymbol and the
stored speed.
iCruise control is not deactivated if you
depress the accelerator pedal. If you acceler-
ate briefly to overtake, for example, cruise
control resumes the vehicle’s speed to the
last speed stored after you have finished over-
taking.
Deactivating cruise control
There are various ways to deactivate cruise con- trol:
XBriefly press the cruise control lever for-
wards ?.
or
XApply the brakes.
The last speed set remains stored. The last
speed stored is deleted when you switch off the
engine.
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Cruise controlisdeactivated automatically
when:
Ryou apply the brakes
Ryouapply the parking brake and the c
indicator lamp inthe instrument cluster lights
up
Ryou are driving slower than 20 mph (30 km/h)
Ryou shift the automat ictransmission to neu-
tral position Nwhile the vehicle is inmotion
RESP®or ASR intervenes
Rthere isa malfunction inthe ESP®, ASR or ABS
system
Problems with cruise control
ProblemPossible causes/consequences and MSolutions
On vehicleswit h steering
wheel buttons, the
speed cannot beset
when cruise control is
activated.The displ ay shows a high-priority message. Thus a change in speed is
not possible.
XProceed as instructed by the message inthe display.
XDeactivate cruise control
COLLISION PREVENTION ASSIST
General notes
COLL ISION PREVENTION AS SISTcomprises the
dist ance warning function and adaptive Brake
Assist.
Distance warning function
Important safety notes
iNote the section on 'Important safety notes'
(Ypage 53).
GWAR NING
The distance warning function does not react:
Rto people or animals
Rto oncoming veh icles
Rto crossing traff ic
Rwhen cornering
Thus, the distance warning function cannot
provide a warning inall critical situations.
There isa risk of an acc ident.
Alwa ys pay careful attention to the traff icsit-
uation and beready to brake.
GWAR NING
The distance warning function cannot always
clearly identify objects and co mplex traff ic
situations.
In such cases, the distance warning function
may:
Rgive an unnecessary warning
Rnot give a warning
There is a risk of an accident.
Alwa ys pay careful attention to the traff icsit-
uation and donot rely solely on the distance
warning function.
Operation
The distance warning function can help you to
minimize the risk of a front-end collision with a
vehicle ahead or reduce the effects of such a
collision. Ifthe distance warning function
detects that there isa risk of a collision, you will
be warned visually and acoustically. Without
your intervention, the distance warning function
cannot prevent a collision.
The distance warning function willissue a warn-
ing at speeds of around 20 mph (30 km/h)or
more if:
Ryou approach a vehicle ahead of you very
quickly. You will then hear an intermittent
warning tone and the red ·warning lamp
in the instrument cluster flashes.
XBrake immediately in order to increase the
distance from the vehicle in front.
or
XTake evasive action provided it is safe to do
so.
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If you want the distance warning function to
assist you, the function must be activated and
operational.
Due to the nature of the system, particularly
complicated driving conditions may cause the
system to display an unnecessary warning.
With the help of the radar sensor system, the
distance warning function can detect obstacles
that are in the path of your vehicle for an exten-
ded period of time.
Up to a speed of around 45 mph (70 km/h), the
distance warning function can also react to sta-
tionary obstacles, such as stopped or parked
vehicles.
If you approach an obstacle and the distance
warning function detects a risk of a collision, the
system will alert you both visually and acousti-
cally.
In particular, the detection of obstacles can be
impaired in the case of:
Rdirt on the sensors or anything else covering
the sensors
Rsnow or heavy rain
Rinterference from other radar sources
Rthere are strong radar reflections, for exam-
ple in parking garages
Ra narrow vehicle traveling in front, e.g. a
motorbike
Ra vehicle traveling in front on a different line
Following damage to the front end of the vehicle,
have the configuration and operation of the
radar sensor checked at a qualified specialist
workshop. This also applies to collisions at slow
speeds where there is no visible damage to the
front of the vehicle.
Activating/deactivating the distance
warning function
When you switch on the engine, the distance
warning function switches on after a few sec-
onds.
XTo deactivate: press theæbutton
(Ypage 36).
Vehicles without steering wheel buttons:
the Ä warning lamp in the instrument clus-
ter lights up and the OFF
message flashes. The
message then disappears and the Äindi-
cator lamp remains lit.
Vehicles with steering wheel buttons: the
Ä warning lamp in the instrument cluster
flashes and the Distance
warningsystemdeactivatedmessage appears .The mes- sage then disappears and the
Äwarning
lamp remains lit.
XTo activate: press theæbutton again
(Ypage 36).
Vehicles without steering wheel buttons:
the Ä warning lamp in the instrument clus-
ter lights up and the on
message flashes. The
message then disappears and the Äindi-
cator lamp goes out.
Vehicles with steering wheel buttons: the
Ä warning lamp in the instrument cluster
flashes and the Distance
warningsystemactivatedmessage appears in the multi-
function display. The message then disap-
pears and the indicator lamp Ägoes out.
Adaptive Brake Assist
iObserve the "Important safety notes" sec-
tion for driving safety systems (Ypage 53).
GWARNING
Adaptive Brake Assist cannot always clearly
identify objects and complex traffic situa-
tions.
In such cases, Adaptive Brake Assist can:
Rintervene unnecessarily
Rnot intervene
There is a risk of an accident.
Always pay careful attention to the traffic sit- uation and be ready to brake. Terminate the
intervention in a non-critical driving situation.
GWARNING
Adaptive Brake Assist does not react:
Rto people or animals
Rto oncoming vehicles
Rto crossing traffic
Rto stationary obstacles
Rwhen cornering
As a result, the Adaptive Brake Assist may not
intervene in all critical conditions. There is a
risk of an accident.
Always pay careful attention to the traffic sit- uation and be ready to brake.
Adaptive Brake Assist aids you when braking
during hazardous situations at speeds above
140Driving systems
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20 mph (30 km/h). With the help of Adaptive
Brake Assist, the distance warning signal can
detect obstacles that are in the path of your
vehicle for an extended period of time.
When you approach an obstacle and adaptive
Brake Assist detects that there is a risk of a col-
lision, adaptive Brake Assist calculates the brak-ing force necessary to avoid a collision. Should
you apply the brakes forcefully, adaptive Brake
Assist will automatically increase the braking
force to the calculated level.
XKeep the brake pedal depressed until the
emergency braking situation is over.
ABS prevents the wheels from locking.
The brakes function as usual again if:
Ryou release the brake pedal
Rthere is no longer any danger of a collision
Rno obstacle is detected in front of your vehicle
Adaptive Brake Assist is then deactivated.
Up to the maximum vehicle speed, adaptive
Brake Assist can react to moving obstacles that
have already been recognized as such at least
once over the period of observation. Adaptive
Brake Assist does not react to stationary obsta-
cles.
In particular, the detection of obstacles can be
impaired if:
Rdirt on the sensors or anything else covering
the sensors
Rsnow or heavy rain
Rinterference from other radar sources
Rthere are strong radar reflections, for exam-
ple in parking garages
Ra narrow vehicle traveling in front, e.g. a
motorbike
Ra vehicle traveling in front on a different line
If adaptive Brake Assist is not available due to a
malfunction in the radar sensor system, the full
brake boosting effect with the help of BAS
remains available.
Following damage to the front end of the vehicle,
have the configuration and operati
on of the
radar sensor checked at a qualified specialist
workshop. This also applies to collisions at slow
speeds where there is no visible damage to the
front of the vehicle.
Lane Tracking package
Blind Spot Assist
General notes
Blind Spot Assist monitors the areas on either
side of the vehicle that are not visible to the
driver with two lateral, rear-facing radar sensors
in the bumper. It supports you from speeds of
approximately 20 mph (30 km/h). A warning
display in the exterior mirrors draws your atten-
tion to vehicles detected in the monitored area. If you then switch on the corresponding turn
signal to change lane, you will also receive an
optical and audible collision warning.
Important safety notes
GWARNING
Blind Spot Assist does not react to:
Rvehicles overtaken too closely on the side,
placing them in the blind spot area
Rvehicles which approach with a large speed
differential and overtake your vehicle
As a result, Blind Spot Assist may not give
warnings in such situations. There is a risk of
an accident.
Always observe the traffic conditions care-
fully, and maintain a safe lateral distance.
Blind Spot Assist is only an aid. It may fail to
detect some vehicles and is no substitute for
attentive driving. Always ensure that there is
sufficient distance to the side for other road
users and obstacles.
iUSA only:
This device has been approved by the FCC as
a "Vehicular Radar System". The radar sensor
is intended for use in an automotive radar
system only. Removal, tampering, or altering
of the device will void any warranties, and is
not permitted by the FCC. Do not tamper with, alter, or use in any non-approved way.
Any unauthorized modification to this device
could void the user’s authority to operate the
equipment.
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Monitoring range of the sensors
In particular, the detection of obstacles can be
impaired in the case of:
Rdirt on the sensors or anything else covering
the sensors
Rpoor visibility, e.g. due to fog, heavy rain or
snow
Rnarrow and short vehicles, e.g. motorcycles
or bicycles
Rvery wide lanes
Rnarrow lanes
Rvehicles not driving in the middle of their lane
Rbarriers or other road boundaries
Vehicles in the monitoring range are then not
indicated.
Blind Spot Assist monitors the area approx-
imately 10 ft (3.0 m) behind your vehicle and
approximately 1.6 ft (0.5 m) to 11.5 ft (3.5 m)
each side of it. The monitoring range behind the
vehicle may also be larger depending on the sit-
uation.
If the lanes are narrow, vehicles driving in the
lane beyond the lane next to your vehicle may be
indicated, especially if the vehicles are not driv-
ing in the middle of their lane. This may be the
case if the vehicles are driving on the inner side
of their lane. Due to the nature of the system:
Rwarnings may be issued in error when driving
close to crash barriers or similar solid lane
borders.
Rwarnings may be interrupted when driving
alongside particularly long vehicles, for exam-
ple trucks, for a prolonged time.
The two sensors for Blind Spot Assist are inte-
grated into the sides of the rear bumper. Make
sure that the bumper is free of dirt, ice or slush
in the vicinity of the sensors. The radar sensors
must not be covered, for example by rear-moun- ted cycle racks or overhanging loads. Following
a severe impact or in the event of damage to the
bumper, have the function of the radar sensors
checked at a qualified specialist workshop.
Blind Spot Assist may otherwise not work prop- erly.
Indicator and warning display
Blind Spot Assist is not active at speeds below
approximately 20 mph (30 km/h). Vehicles in
the monitoring range are then not indicated.
:Yellow indicator lamp and red warning lamp
If yellow indicator lamp :lights up:
Ryou are driving at less than 20 mph (30 km/h)
RBlind Spot Assist is deactivated
RBlind Spot Assist is malfunctioning
Blind Spot Assist is active from a speed of
20 mph (30 km/h). If a vehicle is detected in the
blind spot monitoring range, red warning
lamp :on the corresponding side lights up.
This warning occurs when a vehicle enters the
blind spot monitoring range from behind or from
the side. When you overtake a vehicle, the warn- ing only occurs if the difference in speed is less
than 14 mph (22 km/h).
Yellow indicator lamp :goes out if reverse gear
is engaged. Blind Spot Assist is then deactiva-
ted.
142Driving systems
Driving and parking