007C
Directs air to the windshield, the air
vents and into the footwell
007D Directs air to the air vents and into
the footwell
Adjusting X
Switch on climate control (Y page 116).
X Set air-distribution control 0085for the heat-
ing (Y page 113) or air-conditioning system
0083 (Ypage 114) to the corresponding sym-
bol. Setting the airflow
X Switch on climate control (Y page 116).
X Vehicle with heating/rear-compart-
ment heating: set airflow control 0044of the
heating (Y page 113) or of the rear-com-
partment heating ( Ypage 115) to the
desired level.
X Vehicle with air conditioning/rear-com-
partment air conditioning: press the
0095 button to reduce or the 0097button
to increase the airflow.
The blower speeds are shown in bars next
to the buttons. Defrosting the windows
You can use the "defrosting" function to
defrost the windshield or to demist the inside
of the windshield and the side windows.
Only use the following settings until the win-
dows are clear again.
X Vehicle with window heating: switch on
the front (Y page 119) and/or rear window
defroster (Y page 120) .
X Switch on climate control (Y page 116).Vehicle with heating
X
Set temperature control 0043and airflow
control 0044to0085 (Ypage 113).
X Set air-distribution control 0085to007E
0085 (Ypage 113).
X Close the center air vents (Y page 121) and
the air outlets for the headroom and the
rear compartment ( Ypage 121).
X Direct the side air vents towards the side
windows and open the defroster vents for
the side windows (Y page 121).
Vehicle with air conditioning
X Set temperature control 0043to
0085 (Ypage 114).
X Press the 0097button until the maximum
blower output is reached.
All bars in the display next to the button
light up.
X Set air-distribution control 0083to007E
0085 (Ypage 114).
X Close the center air vents (Y page 121) and
the air outlets for the headroom and the
rear compartment ( Ypage 121).
X Direct the side air vents towards the side
windows and open the defroster vents for
the side windows (Y page 121). Clearing condensation from the win-
dows
Windows fogged up on the inside You should only select this setting until the
windows are clear again.
X
Vehicle with window heating: switch on
the front (Y page 119) and/or rear window
defroster (Y page 120) .
X Switch on climate control (Y page 116).
X Switch off air-recirculation mode
(Y page 120). 118
Operating the climate control systemClimate control
Vehicle with heating
X
Set temperature control 0043to a higher tem-
perature (Y page 113).
X Set airflow control 0044to a higher blower
setting. It should be set at least to level two
(Y page 113).
X Set air-distribution control 0085to
007E0085( Ypage 113).
i If the windows still fog up, set the control
as described for defrosting (Y page 118).
Vehicle with air conditioning
X Activate cooling with air dehumidification
(Y page 117).
X Press the 0066button (Y page 114).
The reheat function is switched on. The
indicator lamp in the switch lights up.
To switch off the reheat function, press the
0066 button again. The indicator lamp in
the button goes out.
Windows fogged up on the outside You should only select this setting until the
windshield is clear again.
X Switch on the windshield wipers
(Y page 107).
X Switch on climate control (Y page 116).
X Adjust air distribution to the footwell
(Y page 117).
X Close the air vents (Y page 121). Windshield defroster
Windshield heater Windshield heater switch
The windshield heater consumes a lot of
power. You should therefore switch it off as
soon as the windshield is clear. The wind-
shield heating otherwise switches off auto-
matically after 5 minutes.
X
Start the engine.
X To switch on/off: press the0085switch.
The indicator lamp in the 0085button
comes on when the windshield heating is
switched on.
If the indicator lamp in the 0085windshield
heating button flashes, the on-board voltage
is too low. The windshield heating has
switched off prematurely or cannot be acti-
vated.
X Switch off any consumers that are not
required, e.g. reading lamps or interior
lighting.
If enough on-board voltage is available again
within 30 seconds, the windshield heating
automatically switches on again. It otherwise
remains switched off. Operating the climate control system
119Climate control
Rear window defroster
Rear window defroster switch
The rear window defroster consumes a lot of
power. You should therefore switch it off as
soon as the window is clear. The rear window
defroster otherwise switches off automati-
cally after 12 minutes.
X Start the engine.
X To switch on/off: press the0071switch.
The indicator lamp in the 0071button
comes on when the rear window defroster
is switched on.
If the indicator lamp in the 0071rear window
defroster button flashes, the on-board volt-
age is too low. The rear window defroster has
switched off prematurely or cannot be acti-
vated.
X Switch off any consumers that are not
required, e.g. reading lamps or interior
lighting.
If enough on-board voltage is available again
within 30 seconds, the rear window defroster
automatically switches on again. It otherwise
remains switched off. Switching air-recirculation mode on/
off
Important safety notes When you switch on air-recirculation mode,
the windows could fog up more quickly, in
particular at low outside temperatures. Only switch on air-recirculation mode for a short
time.
You can deactivate the intake of fresh air if
unpleasant odors enter the vehicle from out-
side. The air inside the vehicle will only be
circulated.
Heating/air-conditioning system
Air-recirculation mode switches off automat-
ically after about 10to 30 minutes, depending
on the outside temperature.
X Switch on climate control (Y page 116).
X To switch on/off: press the008Aswitch.
If the indicator lamp in the 008Abutton
lights up, air-recirculation mode is acti-
vated.
Rear-compartment heating/rear-com-
partment air conditioning On vehicles with a rear-compartment heating
and air-conditioning system, you can acti-
vate/deactivate air-recirculation mode for
the rear-compartment climate control.
X
Switch on climate control (Y page 116).
X To activate: set the temperature control of
rear-compartment heating
0087(Y page 115) or rear-compartment air
conditioning system 0044(Ypage 116) to the
center position.
Only one of the two climate control sys-
tems in the rear compartment is activated
and is in air-recirculation mode.
X To deactivate: turn the temperature
control of rear-compartment heating
0087(Y page 115) or rear-compartment air-
conditioning system 0044(Ypage 116) clock-
wise or counterclockwise. Only change the
temperature in small increments. 120
Operating the climate control systemClimate control
X
To open: for the right-hand side of the vehi-
cle, turn thumbwheel 0044or for the left-hand
side of the vehicle, thumbwheel 0043of the
air vents clockwise.
X To close: for the right-hand side of the
vehicle, turn thumbwheel 0044or for the left-
hand side of the vehicle, thumbwheel 0043of
the air vents counter-clockwise. Adjusting the air vents in the roof duct
! Always leave at least one air vent open.
If the rear-compartment air conditioning is
switched on and all the air vents are closed,
the air-conditioning system may be dam-
aged. On vehicles with rear-compartment air con-
ditioning, adjustable air vents are integrated
into the roof duct.
X To adjust the airflow: open or close the
air flap in air vents 0043as needed.
X To adjust the air distribution: turn air
vent 0043to the desired position. Operating the auxiliary heating sys-
tem Important safety notes
G
DANGER
If the exhaust pipe is blocked or adequate
ventilation is not possible, poisonous gases
such as carbon monoxide (CO) may enter the vehicle. This is the case, for example in
enclosed spaces or if the vehicle gets stuck
in snow. There is a risk of fatal injury.
Switch the auxiliary heating off in enclosed
spaces without extraction systems, e.g. in
garages. If the vehicle is stuck in snow and
you have to leave the auxiliary heating run-
ning, keep the exhaust pipe and the area
around the vehicle free of snow. To ensure an
adequate supply of fresh air, open a window
on the side of the vehicle that is not facing
into the wind. G
WARNING
When the auxiliary heating is switched on,
parts of the vehicle can become very hot, e.g.
the exhaust system. 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 the auxiliary heating is switched on,
make sure that no flammable material can
come into contact with hot vehicle compo-
nents.
! Turn on the auxiliary heating at least once
a month for approximately 10 minutes. The
auxiliary heating could otherwise be dam-
aged.
! Make sure that the flow of hot air is not
blocked. The auxiliary heating will other-
wise overheat and switch off.
Your vehicle may be equipped with either an
auxiliary hot-water heater or an auxiliary
warm-air heater. Adjustment and operation of
the:
R hot-water auxiliary heater is done via the
on-board computer and with the auxiliary
heating button in the control panel
(Y page 124) or with the remote control
(Y page 125).
R auxiliary warm-air heater is done via the
timer above the overhead control panel
(Y page 127).
The auxiliary heating works independently of
the engine and supplements the climate 122
Operating the auxiliary heating systemClimate control
Problems with cruise control
Problem Possible causes/consequences and
0050
0050Solutions On vehicles with steer-
ing wheel buttons, the
speed cannot be set
when cruise control is
activated. The display is showing a message of high priority and cannot
therefore show a change in speed.
X
Proceed as instructed by the message in the display.
X Deactivate cruise control Lane Tracking package
Blind Spot Assist General notes
Blind Spot Assist uses a radar sensor system
to monitor the areas on both sides of your
vehicle. It supports you from speeds of
approximately 20 mph (30 km/h). A warning
display in the exterior mirrors draws your
attention to vehicles detected in the moni-
tored area. If you then switch on the corre-
sponding turn signal to change lane, you will
also receive an optical and audible collision
warning. For this purpose, Blind Spot Assist
uses sensors in the rear bumper and behind
the protective strips of the B-pillars.
Important safety notes G
WARNING
Blind Spot Assist does not react to:
R vehicles overtaken too closely on the side,
placing them in the blind spot area
R vehicles 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.
i USA 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 warran-
ties, 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.
Monitoring range of the sensors
In particular, the detection of obstacles can
be impaired in the case of:
R dirt on the sensors or anything else cover-
ing the sensors
R poor visibility, e.g. due to fog, heavy rain or
snow
R narrow and short vehicles, e.g. motorcy-
cles or bicycles
R very wide lanes
R narrow lanes
R vehicles not driving in the middle of their
lane
R barriers or other road boundaries
Vehicles in the monitoring range are then not
indicated. 164
Driving systemsDriving and parking
You should always steer, brake or accelerate
yourself, in particular if warned by Lane Keep-
ing Assist.
Lane Keeping Assist may not work properly
or may not work at all if the vehicle is incor-
rectly loaded (Y page 242).
If you fail to adapt your driving style, Lane
Keeping Assist can neither reduce the risk of
accident nor override the laws of physics.
Lane Keeping Assist cannot take into account
road, weather or traffic conditions. Lane
Keeping Assist is only an aid. You are respon-
sible for the distance to the vehicle in front,
for vehicle speed, braking in good time and
for staying in your lane.
Lane Keeping Assist does not keep your vehi-
cle in its lane.
The system may be impaired or may not func-
tion if:
R there is poor visibility, e.g. due to insuffi-
cient illumination of the road, or due to
snow, rain, fog or spray
R there is glare, e.g. from oncoming traffic,
the sun or reflection from other vehicles
(e.g. if the road surface is wet)
R the windshield is dirty, fogged up, damaged
or covered, for instance by a sticker, in the
vicinity of the camera
R no, or several, unclear lane markings are
present for one lane, e.g. in a construction
area
R the lane markings are worn away, dark or
covered up, e.g. by dirt or snow
R the distance to the vehicle in front is too
small and the lane markings thus cannot be
detected
R the lane markings change quickly, e.g.
lanes branch off, cross one another or
merge
R the road is narrow and winding
R there are highly variable shade conditions
on the road
A warning may be given if a front wheel
passes over a lane marking. In addition, a warning tone sounds and the
00B0indicator
lamp in the instrument cluster lights up.
Activating/deactivating Lane Keeping
Assist
Lane Keeping Assist is automatically acti-
vated when you start the engine.
X To deactivate: press the button in
the center console (Y page 37).
On vehicles without steering wheel but-
tons:
OFF OFF flashes briefly in the display and the
00B0 indicator lamp in the instrument clus-
ter flashes and then lights up continuously.
On vehicles with steering wheel but-
tons:
The message: Lane Keeping Assist Lane Keeping Assist
deactivated
deactivated appears in the display and
the 00B0 indicator lamp in the instrument
cluster flashes and then lights up contin-
uously.
Lane Keeping Assist is deactivated.
X To activate: press the button in the
center console again (Y page 37).
On vehicles without steering wheel but-
tons:
ON ON flashes briefly in the display and the
00B0 indicator lamp in the instrument clus-
ter flashes and then goes out.
On vehicles with steering wheel but-
tons:
The message: Lane Keeping Assist Lane Keeping Assist
activated
activated appears in the display and the
00B0 indicator lamp in the instrument clus-
ter flashes and then goes out.
Lane Keeping Assist is activated.
A Lane Keeping Assist warning is suppressed
if:
R a driving safety system intervenes, such as
ABS, BAS or ESP ®
.
R you have set the turn signal and a lane
change is detected. In this case, the warn- Driving systems
167Driving and parking Z
Observe the following when towing a trailer:
R Practice driving around bends, stopping
and backing up at a place where there is no
traffic. This enables you to gain experience
and get used to the new handling charac-
teristics.
R Before driving, check:
-that the trailer tow hitch and ball cou-
pling are secure
- that the safety switch for a braked trailer
is functioning properly
- that the safety chains are secure and not
damaged
- that the electrical connections are
secure
- that the lights are working
- that the wheels are in good order and the
tire pressure is correct
R Adjust the exterior mirrors to provide an
unobstructed view of the rear section of the
trailer.
R If the trailer has electronically controlled
brakes, pull the vehicle/trailer combina-
tion away carefully. Brake manually using
the brake controller and check that the
brakes are working.
R Secure the load on the trailer according to
the applicable specifications and current
standards on securing loads
(Y page 244).
R When driving with a trailer, check at regular
intervals that the load is secured and that
the brakes and lights are working.
R Bear in mind that the handling will be less
stable when towing a trailer than when driv-
ing without one. Avoid sudden steering
movements.
R The vehicle/trailer combination is heavier,
accelerates more slowly and has a
decreased gradient climbing capability and
a longer braking distance.
It is more susceptible to crosswinds and
requires cautious steering.
R If possible, do not brake suddenly, but
rather moderately at first so that the trailer can activate its brakes. Then increase the
force on the brake pedal.
R If the automatic transmission repeatedly
shifts between gears when driving on
inclines, restrict the shift range. Select shift
range 4,3,2or 1.
Driving in a low gear and at a low speed
reduces the risk of damaging the engine.
R When driving on a downhill gradient, shift
to a low gear and take advantage of the
engine's braking effect.
Avoid continuous brake application as this
may overheat the vehicle brakes and, if
installed, the trailer brakes.
R If the coolant temperature increases dra-
matically while the air-conditioning system
is switched on, switch off the air-condition-
ing system.
Coolant heat can also be dissipated by
switching the airflow and the temperature
of the heater/air conditioning to the maxi-
mum level. Open the windows if necessary.
R When overtaking, pay particular attention
to the extended length of your vehicle/
trailer combination.
Due to the length of your vehicle/trailer
combination you need an additional dis-
tance before you can return to your original
lane. Uncoupling a trailer
G
WARNING
If you uncouple a trailer with the overrun
brake engaged, you could trap your hand
between the vehicle and the trailer drawbar.
There is a risk of injury.
Do not uncouple a trailer if the overrun brake
is engaged.
! Do not disconnect a trailer with an
engaged overrun brake. Otherwise, your
vehicle could be damaged by the rebound-
ing of the overrun brake. Towing a trailer
177Driving and parking Z
Useful information
This Operator's Manual describes all models
as well as standard and optional equipment
of your vehicle that were available at the time
of going to print. Country-specific variations
are possible. Note that your vehicle may not
be equipped with all of the described func-
tions. This also applies to systems and func-
tions relevant to safety.
Read the information on qualified specialist
workshops (Y page 26). Important safety notes
G
WARNING
If you are driving and reach through the steer-
ing wheel to operate the adjustment knob,
you could lose control of the vehicle. There is
a risk of an accident and injury.
Only operate the adjustment knobs when the
vehicle is stationary. Do not reach through the
steering wheel when driving. G
WARNING
If you operate information systems and com-
munication equipment integrated in the vehi-
cle while driving, you will be distracted from
traffic conditions. You could also lose control
of the vehicle. There is a risk of an accident.
Only operate the equipment when the traffic
situation permits. If you are not sure that this
is possible, park the vehicle paying attention
to traffic conditions and operate the equip-
ment when the vehicle is stationary. G
WARNING
If the instrument cluster has failed or mal-
functioned, you may not recognize function
restrictions in systems relevant to safety. The
operating safety of your vehicle may be
impaired. There is a risk of an accident.
Drive on carefully. Have the vehicle checked
at a qualified specialist workshop immedi-
ately. If uncertainties regarding the operating safety
of the vehicle arise when continuing the jour-
ney, stop the vehicle, paying attention to road
and traffic conditions. Instrument cluster
Overview
0043
Instrument cluster on vehicles without
steering wheel buttons
0044 Instrument cluster in vehicles with steer-
ing-wheel buttons
0087 0074/0075 adjustment button, 0079menu but-
ton, 0045reset button, 0098service button
(engine oil level check)
You will find a full overview of the instrument
cluster in the "At a glance" section
(Y page 34).
The display in the instrument cluster is acti-
vated when you:
R open the driver's door
R turn the key to position 2in the ignition lock
R press the 0045reset button
R switch on the lights
The display switches off automatically after
approximately 30 seconds if:
R the vehicle lighting is not switched on.
R the key is in position 0in the ignition lock. 182
Instrument clusterOn-board computer and displays