Active light function
The active light function is a system that
moves the headlamps according to the steer-
ing movements of the front wheels. In this
way, relevant areas will be illuminated to a
greater extent while driving. This allows you
to recognize pedestrians, cyclists and ani-
mals.
Active: when the lights are switched on. Highbeam Assist
General notes You can use this function to set the head-
lamps to change between high beam and low
beam automatically. The system recognizes
vehicles with their lights on, either approach-
ing from the opposite direction or traveling in
front of your vehicle, and consequently
switches the headlamps from high beam to
low beam.
Once the system no longer detects any other
vehicles, it reactivates the high-beam head-
lamps.
The system's optical sensor is located behind
the windshield near the overhead control
panel.
Important safety notes G
WARNING
Highbeam Assist does not recognize road
users:
R who have no lights, e.g. pedestrians
R who have poor lighting, e.g. cyclists
R whose lighting is blocked, e.g. by a barrier
In very rare cases, Highbeam Assist may fail
to recognize other road users who have lights,
or may recognize them too late. In this or sim-
ilar situations, the automatic high-beam head-
lamps will not be deactivated or will be acti-
vated regardless. There is a risk of an acci-
dent. Always carefully observe the traffic conditions
and switch off the high-beam headlamps in
good time.
Highbeam Assist cannot take into account
road, weather or traffic conditions. Highbeam
Assist is only an aid. You are responsible for
adjusting the vehicle's lighting to the prevail-
ing light, visibility and traffic conditions.
In particular, the detection of obstacles can
be restricted if there is:
R poor visibility, e.g. due to fog, heavy rain or
snow
R dirt on the sensors or anything else cover-
ing the sensors
Activating/deactivating Highbeam
Assist X
To activate: switch on the Highbeam
Assist function using the on-board com-
puter (Y page 194).
X Turn the light switch to the 0058position.
X Press the combination switch beyond the
pressure point in the direction of arrow 0043
(Y page 95).
Highbeam Assist is active.
The or
00CE indicator lamp in the
multifunction display lights up when it is
dark and the light sensor activates the low-
beam headlamps.
If you are driving at speeds above approx-
imately 22 mph (35 km/h) and no other
road users have been detected:
The high-beam headlamps are switched on
automatically. The 0057indicator lamp in
the instrument cluster also lights up.
If you are driving at speeds below approx-
imately 19 mph (30 km/h) other road users
are recognized or the roads are adequately
lit:
The high-beam headlamps are switched off
automatically. The 0057indicator lamp in
the instrument cluster goes out. The 00CE Exterior lighting
97Lights and windshield wipers Z
Cargo compartment lamp
Type of lamp: W 10 W
X
Switch off the interior lighting.
X Undo screws 0043and remove the lamp lens.
X Press bulb 0044into the bulb holder and
unscrew it counter-clockwise.
X Press new bulb 0044into the bulb holder and
screw it in clockwise.
X Position the lamp lens and tighten
screws 0043.
i Vehicles with LED cargo compart-
ment lamp: if an LED is defective, consult
a qualified specialist workshop. Windshield wipers
Switching the windshield wiper on/
off
! Do not operate the windshield wipers
when the windshield is dry, as this could
damage the wiper blades. Moreover, dust
that has collected on the windshield can
scratch the glass if wiping takes place when
the windshield is dry.
If it is necessary to switch on the windshield
wipers in dry weather conditions, always
use washer fluid when operating the wind-
shield wipers. !
If the windshield wipers leave smears on
the windshield after the vehicle has been
washed in an automatic car wash, wax or
other residues may be the reason for this.
Clean the windshield using washer fluid
after washing the vehicle in an automatic
car wash.
! Vehicles with rain/light sensor:
Switch the wipers off in dry weather. Oth-
erwise, dirt or optical effects may cause
undesired windshield wiper sweeps. This
could then damage the windshield wiper
blades or scratch the windshield.
The windshield will no longer be wiped prop-
erly if the wiper blades are worn. Replace the
wiper blades twice a year (Y page 108), ide-
ally in spring and fall. Combination switch
X
Turn the SmartKey to position 1or 2in the
ignition lock.
X Turn the combination switch in the direc-
tion of arrow 0044to the appropriate setting
depending on the intensity of the rain.
X Single wipe: push the combination switch
briefly to the pressure point in the direction
of arrow 0043.
X To wipe with washer fluid: press the com-
bination switch beyond the pressure point
in the direction of arrow 0043.
i Wipe the windshield using washer fluid
even if it is raining. By doing so, you will
prevent smears on the windshield. Windshield wipers
107Lights and windshield wipers Z
The detent positions of the combination
switch correspond to the following wiper
speeds:
0W indshield wipers off
II ntermittent wipe
II Normal wipe
III Rapid wipe
i Canada only:
If the windshield wipers are switched on
and you stop the vehicle, the windshield
wiper speed is reduced. For example, if you
have selected level IIand stop the vehicle,
wiping continues with intermittent wipe
while the vehicle is stationary. If intermit-
tent wipe is selected, the intervals become
longer.
Vehicles with a rain and light sensor:
you can use level Ias the universal setting.
The rain and light sensor sets the appropri-
ate wiping frequency automatically,
according to the intensity of the rain. When
you stop the vehicle, levels IIIand IIare
switched down to level Iautomatically.
The windshield wiper will return to the orig-
inal level when you drive faster than
5 mph (8 km/h).
You can adjust the sensitivity of the rain and
light sensor using the on-board computer
(Y page 196).
Information on checking the washer fluid
level can be found in the "Maintenance and
care" (Y page 257) section. Switching the rear window wiper on/
off Combination switch
0043
00C5 Rear window wiper switch
0048 00E2 To wipe with washer fluid
0049 ITo switch on intermittent wiping
004A 0To switch off intermittent wiping
004B 00E2 To wipe with washer fluid
X Turn the key to position 1or 2in the ignition
lock.
X Turn switch 0043to the corresponding posi-
tion
The rear window wiper switches on automat-
ically if you engage reverse gear and the wind-
shield wipers are on. Replacing the wiper blades
G
WARNING
If the windshield wipers begin to move while
you are changing the wiper blades, you could
be trapped by the wiper arm. There is a risk
of injury.
Always switch off the windshield wipers and
ignition before changing the wiper blades.
! Never open the hood if a windshield wiper
arm has been folded away from the wind-
shield.
Never fold a windshield wiper arm without
a wiper blade back onto the windshield/
rear window. 108
Windshield wipersLights and
windshield wipers
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
Blind Spot Assist monitors the area approx-
imately 10 ft (3.0 m) behind your vehicle and
approximately 11.5 ft (3.5 m) to each side of
it. For this purpose, Blind Spot Assist uses
radar sensors in the rear bumper and behind
the protective strips of the B-pillars.
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
driving 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:
R a clear warning situation may not occur.
The yellow indicator lamp on the relevant
side of the vehicle will then light up.
R warnings may be issued in error when driv-
ing close to crash barriers or similar solid
lane borders.
R warnings may be interrupted when driving
alongside particularly long vehicles, for
example trucks, for a prolonged time.
The four sensors of Blind Spot Assist are inte-
grated into the rear bumper and behind the
protective strips of the B-pillars. Make sure
that the bumper and protective stripping are
free of dirt, ice or slush in the vicinity of the
sensors. The radar sensors must not be cov-
ered, for example by cycle racks or overhang-
ing loads. Have the function of the radar sensors
checked at a qualified specialist workshop:
R
after a severe impact
R in the event of damage to the bumper
R in the event of damage to the protective
strips of the B-pillars
Blind Spot Assist may otherwise not work
properly.
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. 0043
Yellow indicator lamp/red warning lamp
If yellow indicator lamp 0043lights up:
R you are driving at less than 20 mph
(30 km/h)
R Blind Spot Assist is deactivated
R Blind Spot Assist is malfunctioning
R there is no clear warning, depending on the
situation
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 0043on 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 warning only occurs if the difference in
speed is less than 14 mph (22 km/h).
Yellow indicator lamp 0043goes out if reverse
gear is engaged. Blind Spot Assist is then
deactivated. Driving systems
165Driving and parking Z
ings are suppressed for a certain period of
time.
R you accelerate hard, e.g. kickdown.
R you brake hard.
R you steer actively, e.g. swerve to avoid an
obstacle or change lane quickly.
R you cut the corner on a sharp bend.
In order that you are warned only when nec-
essary and in good time if you cross the lane
marking, the system recognizes certain con-
ditions and warns you accordingly.
Lane Keeping Assist warns you earlier if:
R you approach the outer lane marking on a
bend.
R the road has very wide lanes, e.g. a high-
way.
R the system recognizes solid lane markings.
Warnings are given later if:
R the road has narrow lanes.
R you cut the corner on a bend. PARKTRONIC
Important safety notes PARKTRONIC is only an aid. It cannot replace
your own awareness of the immediate sur-
roundings. You are responsible for safe
maneuvering, parking and pulling away. When
maneuvering, parking and pulling away, make
sure that there are no persons, animals or
objects in the maneuvering area.
PARKTRONIC does not account for obstacles
that are:
R beneath its detection range, e.g. persons,
animals or objects
R above its detection range, e.g. overhanging
loads, overhangs or truck loading ramps
PARKTRONIC is an electronic parking aid with
ultrasonic sensors. It indicates the distance
between your vehicle and an object visually
and audibly.
Your vehicle features two separate sound
emitters with different frequencies for the warning tones. The warning ranges in front of
and behind the vehicle are indicated by dif-
ferent warning tones.
PARKTRONIC is activated automatically when
you:
R turn the key to position 2in the ignition lock
R release the parking brake and
R move the selector lever to D,Nor R.
PARKTRONIC is deactivated at speeds above
11 mph (18 km/h). PARKTRONIC is reacti-
vated at speeds below 10 mph (16 km/h).
PARKTRONIC monitors the area around your
vehicle with sensors in the front and rear
bumpers.
Range of the sensors !
Pay particular attention to obstacles
above or below the sensors when parking,
such as flower pots or trailer towbars.
PARKTRONIC does not recognize such
objects when they are in the immediate
vicinity of the vehicle. You could damage
the vehicle or objects.
PARKTRONIC can suffer interference from:
R ultrasonic sources such as a truck's
compressed-air brakes, an automatic car
wash or a pneumatic drill
R attachments to the vehicle, e.g. rear
mounted racks
R number plates (vehicle license plates)
that are not affixed flat against the
bumper
R dirty or icy sensors 168
Driving systemsDriving and parking
The sensors must be free of dirt, ice or slush.
Otherwise, they cannot function correctly.
Clean the sensors regularly, taking care not
to scratch or damage them (Y page 270).Front sensors
Center Approximately 39 in
(100 cm)
Corners Approximately 26 in
(65 cm)
Rear sensors
Center Approximately 71 in
(180 cm)
Corners Approximately 39 in
(100 cm) Minimum distance
Center Approximately 12 in
(30 cm) Front corner sen-
sors Approximately 10 in
(25 cm) Rear corner sensors Approximately 12 in
(30 cm) If an obstacle is within this range, all seg-
ments of the warning displays light up and you
hear a warning tone. If the distance between
the vehicle and the obstacle falls below the
minimum range, it is possible that the dis-
tance may no longer be displayed.
Warning displays
Warning display, front area
Warning display for the left-hand rear area in the
left-hand exterior mirror
0043
Warning segments for the left front area
0044 Warning segments for the right front area
0087 Operational readiness symbol for the
front area Driving systems
169Driving and parking Z
0085
Warning display segments
0083 Operational readiness symbol for the rear
area
The warning displays show the distance
between the sensor and the obstacle.
The warning display is divided into five yellow
and two red segments for each side of the
vehicle. PARKTRONIC is operational if yellow
indicator segments 0087and 0083are lit.
There is a malfunction if only the red seg-
ments of the warning display light up
(Y page 171).
The position of the gear lever determines
whether the front and/or rear area is moni-
tored. Selector lever
position Monitoring
D
Front area
R
or N Front and rear area
P
No areas activated
One or more segments light up as the vehicle
approaches an obstacle, depending on the
vehicle's distance from the obstacle.
From the:
R
sixth segment, an intermittent warning
tone sounds for approximately 2 seconds.
R seventh segment, a continuous warning
tone sounds. This indicates that you have
now reached the minimum distance.
Roll-back warning PARKTRONIC automatically monitors the
area behind the vehicle if the vehicle begins
to roll backwards without reverse gear
engaged, e.g. after stopping on an uphill gra-
dient.
If PARKTRONIC recognizes an obstacle at a
distance of at most 31 in (80 cm), all the seg-
ments in the warning displays light up. A con-
tinuous warning tone also sounds as the vehi-
cle approaches the obstacle and for a further 2 seconds after the vehicle has come to a
halt.
Activating/deactivating PARKTRONIC
X
Press the 0069button.
If PARKTRONIC is deactivated, the indica-
tor lamp in the switch lights up.
Towing a trailer PARKTRONIC detects a coupled trailer if your
vehicle is equipped with the corresponding
electrical installations for trailer towing.
PARKTRONIC is deactivated for the rear area
when you establish an electrical connection
between your vehicle and a trailer. If you use
an adapter for the socket, remove it from the
socket after detaching the trailer. Otherwise,
PARKTRONIC remains deactivated for the
rear area.
Remove a detachable trailer coupling if it is
no longer required. PARKTRONIC measures
the minimum detection range to an obstacle
from the bumper, not the ball coupling. 170
Driving systemsDriving and parking