
Indicator and warning display
:
Yellow indicator lamp/red warning lamp
When Active Blind Spo tAssist is activated,
indicator lamp :in the exterior mirrors lights
up in yellow at speeds of up to 30 km/h. At
speeds above 30 km/h, the indicator lamp
goes out and Active Blind Spot Assist is
operational.
If a vehicle is detected within the monitoring
range of Blind Spot Assist at speeds above
30 km/h, warning lamp :on the corre-
sponding side lights up red. This warning is
always emitted 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 12 km/h.
The yellow indicator lamp goes out if reverse
gear is engaged. Active Blind Spot Assist is
then no longer active.
The brightness of the indicator/warning
lamps is adjusted automatically according to
the ambient light. G
WARNING
Active Blind Spot Assist is not active at speeds
below 30 km/h. The indicator lamps in the
exterior mirrors are yellow. Vehicles in the
monitoring range are then not indicated.
Always pay attention to traffic conditions and
your surroundings. Otherwise, you may fail to
recognise dangers in time, cause an accident
and injure yourselfa nd others. Visual and acoustic collision warning
If you switch on the appropriate turn signals
and a vehicle is detected in the side monitor-
ing range, you will receive a visual and acous-
tic collision warning
.You will hear a double
warning tone and red warning lamp :
flashes. If the turn signal remains on, detec-
ted vehicles are indicated by the flashing of
red warning lamp :. There are no further
warning tones.
Course-correcting brake application
If Active Blind Spot Assist detects a risk of a
lateral collision in the monitoring range, a
course-correcting brake application is carried
out. This is designed to help you avoid a col-
lision.
The course-correcting brake application is
available in the range between 30 km/ha nd
200 km/h.
If a course-correcting brake application
occurs, red warning lamp :flashes in the
exterio rmirro rand the following is shown in
the multifunctio ndisplay, for example: Example: vehicles with automatic transmission
G
WARNING
Active Blind Spot Assist is only an aid
designed to assist driving. It is not a substitute
for attentive driving. Automatic braking by the
system may not always be sufficien tto avoid
a collision. In such cases, you need to steer,
brake or accelerate yourself.
In very rare cases, the system may detect a
risk of collision where there is none and brake
in error near crash barriers or similar road
boundaries. Active Blind Spot Assist cannot
detect all traffic situations and road users.
Ensure at all times that there is sufficient lat-
eral distance between you and other road Driving systems
211Driving and parking
Z 

may detect the lane markings on the road
incorrectly or not at all.
The system may be impaired or may not func-
tion if:
R
several or no lane markings for a single lane
are present.
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.
R the windscreen is dirty, misted up or cov-
ered, for instance by a sticker, in the vicinity
of the camera.
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 on the road are unclear,
e.g. near roadworks.
R the lane markings change quickly, e.g.
lanes branch off, cross one another or
merge.
R the road is narrow and winding.
Active Lane Keeping Assist cannot detect
road and traffic conditions. It is not a substi-
tute for attentive driving. You are responsible
for the vehicle's speed, braking in good time,
and steering correctly. Always adapt your
driving style to suitt he prevailing road and
weather conditions.A lways pay attention to
traffic conditions and your surroundings. Oth-
erwise, you may fail to recognise dangers in
time, cause an accident and injure yourself
and others.
Warning vibration in the steering wheel
A warning may be given if a front wheel
passes over a lane marking. You will the nbe
warned by means of an intermittent vibration
in the steering wheel for up to 1. 5seconds.
In order that you are warned only when nec-
essary and in good time if you cross the lane marking, the system recognises certain con-
ditions and warns you accordingly.
The warning vibration occurs earlier if:
R
you approach the outer lane marking on a
bend.
R the road has very wide lanes, e.g. a motor-
way.
R the system recognises solid lane markings.
The warning vibration occurs later if:
R the road has narrow lanes.
R you cut the corner on a bend.
No warning vibration occurs if:
R you clearly and actively steer, brake, or
accelerate.
R you cut the corner on a sharp bend.
R a driving safety system intervenes, such as
ABS, BAS or ESP ®
.
R you have switched on the turn signals. In
this event, the warnings are suppressed for
a certain period of time.
Lane-correcting brake application
If you leave your lane under certain circum-
stances, the vehicle will brake briefly on one
side. This is designed to help you bring the
vehicle back into the original lane.
This function is available in the range between
60 km/h and 200 km/h.
A lane-correcting brake application can only
be made after driving over a solid, recognis-
able lane marking. Befor ethis, a warning
must be emitted by means of intermittent
vibration in the steering wheel. In addition, a
lane with lane markings on both sides must
be recognised. The brake application also
slightly reduces driving speed.
If a lane-correcting brake application occurs,
the following appears in the multifunction dis-
play: Driving systems
213Driving and parking Z 

Example: vehicles with automatic transmission
i
A further lane-correcting brake applica-
tion can only occur after your vehicle has
returned to the original lane. G
WARNING
Active Lane Keeping Assist does not keep
your vehicle in its lane. It is only an aid
designed to assist driving .Itis not a substitute
for attentive driving. Corrective braking may
not always be sufficient to return your vehicle
to its original lane. In such cases, you must
steer the vehicle yourselft o ensure that it
does not leave the lane.
Active Lane Keeping Assist cannot detect the
current traffic situation or other road users.
Ensure at all times that there is sufficient lat-
eral distance between you and other road
users or obstacles. In rare cases, broken lines
or certain structures on the road surface may
be detected by the system as solid lane mark-
ings. You can, for example, countersteer gen-
tly at any time to cancel inappropriate braking
action, e.g. if you intentionally drive across a
solid lane marking.
Active Lane Keeping Assist cannot take
weather conditions into account.
You are responsible for the vehicle's speed,
correc tsteering and for braking in good time.
Always adap tyour driving style to suit the
prevailing road and weather conditions.
Always pay attention to traffic conditions and
your surroundings. Otherwise, you may fail to
recognise dangers in time, cause an accident
and injure yourself and others. No lane-correcting brake application occurs
if:
R
you clearly and actively steer, brake, or
accelerate.
R you cut the corner on a sharp bend.
R you have switched on the turn signals.
R a driving safety system intervenes, such as
ESP ®
, PRE-SAFE ®
Brake or Active Blind
Spot Assist.
R you have adopted a sporty driving style with
high cornering speeds or high rates of
acceleration.
R on vehicles with a trailer tow hitch, the
electrical connection to the trailer has been
correctly established.
R ESP ®
is deactivated.
R the transmission is not in position D.
R a loss of tyre pressure or a defective tyre
has been detected and displayed.
Active Lane Keeping Assist does not detect
road and traffic conditions. An inappropriate
brake application may be interrupted at any
time if:
R you steer slightly in the opposite direction.
R you use a turn signal.
R you clearly brake or accelerate.
Al ane-correcting brake applicatio nis inter-
rupted automatically if:
R a driving safety system intervenes, such as
ESP ®
, PRE-SAFE ®
Brake or Active Blind
Spot Assist.
R lane markings can no longer be recognised.
Activating Active Lane Keeping Assist Example: vehicles with automatic transmission214
Driving systemsDriving and parking 

Display messages Possible causes/consequences and
M Solutions
6
Rear centre mal‐
function Consult
workshop G
Risk of injury
SRS has malfunctioned at the rear centre. The 6warning lamp
also lights up in the instrumen tcluster.
X Visit a qualified specialist workshop. 6
Left
windowbag mal‐
function Consult
workshop orRight
windowbag malfunc‐
tion Consult work‐
shop G
Risk of injury
There is a malfunction in the left-hand and/or right-hand window-
bag. The 6warning lamp also lights up in the instrumen tclus-
ter.
X Visit a qualified specialist workshop. Lights (4-button multifunction steering wheel)
i Display messages about LEDs:
This display message will only appear if all LEDs have failed. Displa
ymessages Possible causes/consequences and
M Solutions
b
Left corner. light
or
Right corner. light The left or right-hand cornering light is faulty.
X
Chec kwhether you are permitted to change the bulb yourself
(Y page 125).
or
X Visit a qualified specialist workshop. b
Left dipped beam
or
Right dipped-beam The left or right-hand dipped-beamh
eadlamp is faulty.
X Check whether you are permitted to change the bulb yourself
(Y page 125).
or
X Visit a qualified specialist workshop. b
Trailer left tail
lamp or
Trailer right tail lamp The left or right-hand trailer tail lamp is faulty.
X
Check whether you are permitted to change the bulb yourself.
or
X Visit a qualified specialist workshop. b
Trailer
left indic.
or
Trailer right indic. The left or right-hand trailer turn signal lamp is faulty.
X
Check whether you are permitted to change the bulb yourself.
or
X Visit a qualified specialist workshop. Display messages
261On-board computer and displays Z 

Display messages Possible causes/consequences and
M Solutions
b
Trailer brake lamp The trailer brake lamp is faulty.
X
Chec kwhether you are permitted to change the bulb yourself.
or
X Visit a qualified specialist workshop. b
Rear
left indicator
or
Rear right indi‐ cator The rear left-hand or rear right-hand turn signal is faulty.
X
Check whether you are permitted to change the bulb yourself
(Y page 125).
or
X Visit a qualified specialist workshop. b
Front left indica‐
tor or
Front right indicator The front left-hand or front right-hand turn signal is faulty.
X
Check whether you are permitted to change the bulb yourself
(Y page 125).
or
X Visit a qualified specialist workshop. b
Left
mirror indica‐
tor or
Right mir‐ ror indicator The turn signal in the left-hand or right-hand exterior mirror is
faulty.
X
Check whether you are permitted to change the bulb yourself
(Y page 125).
or
X Visit a qualified specialist workshop. b
Third brake lamp The third brake lamp is faulty.
X
Check whether you are permitted to change the bulb yourself
(Y page 125).
or
X Visit a qualified specialist workshop. b
Tail/brake lamp,
left or
Tail/brake lamp, right The left or right-hand tail lamp/brake lamp is faulty.
X
Check whether you are permitted to change the bulb yourself
(Y page 125).
or
X Visit a qualified specialist workshop. b
Left main beam
or
Right main beam The left or right-hand high beam is faulty.
X
Check whether you are permitted to change the bulb yourself
(Y page 125).
or
X Visit a qualified specialist workshop. 262
Display messagesOn-board computer and displays 

Display messages Possible causes/consequences and
M Solutions
b
Trailer left indi‐
cator or
Trailer right indicator The lef
torright-hand trailer tur nsignal lamp is faulty.
X Check whether you are permitted to change the bulb yourself.
or
X Visit a qualified specialist workshop. b
Trailer brake lamp The trailer brake lamp is faulty.
X Check whether you are permitted to change the bulb yourself.
or
X Visit a qualified specialist workshop. b
Rear
left indicator
or
Rear right indi‐ cator The rear left-hand or rear right-hand tur
nsignal is faulty.
X Check whether you are permitted to change the bulb yourself
(Y page 125).
or
X Visit a qualified specialist workshop. b
Front left indica‐
tor or
Front right indicator The front left-hand or front right-hand turn signal is faulty.
X Check whether you are permitted to change the bulb yourself
(Y page 125).
or
X Visit a qualified specialist workshop. b
Left
mirror indica‐
tor or
Right mir‐ ror indicator The turn signal in the left-hand or right-hand exterior mirror is
faulty.
X Check whether you are permitted to change the bulb yourself
(Y page 125).
or
X Visit a qualified specialist workshop. b
Third brake lamp The third brake lamp is faulty.
X
Check whether you are permitted to change the bulb yourself
(Y page 125).
or
X Visit a qualified specialist workshop. b
Left-hand tail
lamp/brake lamp or
Right-hand tail lamp/brake lamp The left or right-hand tail lamp/brake lamp is faulty.
X
Check whether you are permitted to change the bulb yourself
(Y page 125).
or
X Visit a qualified specialist workshop. Display messages
265On-board computer and displays Z 

X
Press the mark on cover :inwards in the
direction of the arrow.
X Take cover :off the opening.
X Screw the towing eye in clockwise to the
stop and tighten it.
Removing the towing eye X
Loosen the towing eye and unscrew it.
X Attach cover :to the bumper and press
until it engages.
X Place the towing eye in the vehicle tool kit. Towing the vehicle with the rear axle
raised
Only possible on vehicles without
4MATIC.
When towing your vehicle with the rear axle
raised, it is importan tthat you observe the
safety instructions (Y page 351).
! The ignition must be switched off if you
are towing the vehicle with the rear axle
raised. Intervention by ESP ®
could other-
wise damage the brake system.
X Switch on the hazard warning lamps
(Y page 121).
X Turn the key in the ignition lock to position
0 and remove the key from the ignition
lock.
X When leaving the vehicle, take the key or
the KEYLESS-GO key with you. Towing the vehicle with both axles on
the ground
It is important that you observe the safety
instructions when towing away your vehicle
(Y page 351). G
WARNING
The power assistance for the steering and the
brake force booster do not work when the
engine is not running. You will then need much more effort to brake and steer the vehi-
cle. Adapt your style of driving accordingly.
X Switch on the hazard warning lamps
(Y page 121).
i When towing with the hazard warning
lamps switched on, use the combination
switch as usual to signal achange of direc-
tion. In this case, only the turn signals for
the desired direction flash. When the com-
bination switch is reset, the hazard warning
lamps start flashing again.
X Turn the key to position 2in the ignition
lock.
X When the vehicle is stationary, depress the
brake pedal and keep it depressed.
X Vehicles with manual transmission:
depress the clutch pedal.
X Engage neutral.
or
X Vehicles with automatic transmission:
shift the automatic transmission to posi-
tion N.
X Release the brake pedal.
X Release the parking brake. Transporting the vehicle
The towing eyes or trailer tow hitch can be
used to pull the vehicle onto a trailer or trans-
porter if you wish to transport it.
X Vehicles with manual transmission:
shift to neutral.
X Vehicles with automatic transmission:
turn the key to position 2in the ignition
lock.
X Move the selector lever to N.
As soon as the vehicle is loaded:
X Prevent the vehicle from rolling away by
applying the parking brake.
X Vehicles with manual transmission:
shift to first gear or reverse gear. Towing and tow-starting
353Breakdown assistance Z