
When driving at speeds below 30 km/h, you
will see parking symbol ;as a status indi-
cator in the instrument cluster. When a park-
ing space has been detected, an arrow
towards the right or the left also appears.
Active Parking Assist only displays parking
spaces on the front-passenger side as stand- ard. Parking spaces on the driver's side are
displayed as soon as the turn signal on the
driver's side is activated. When parking on thedriver's side, this must remain switched on
until you acknowledge the use of Active Park-
ing Assist by pressing the abutton on the
multifunction steering wheel.
i In the case of parking spaces that are at
right angles to the direction of travel,
please ensure that the parking space is
long enough to accommodate your vehicle.
A parking space is displayed while you are
driving past it, and until you are approx-
imately 15 m away from it.
Parking G
WARNING
Active Parking Assist merely aids you by inter- vening actively in the steering. There is a risk
of accident if you do not apply the brakes
yourself.
Always apply the brakes yourself when park-
ing and manoeuvring.
X Stop the vehicle when the parking symbol
shows the desired parking space in the
instrument cluster.
X Shift the transmission to position R.
The Start Park Assist? Yes: OK No:
Start Park Assist? Yes: OK No:
% message appears in the multifunction
display. X
To cancel the procedure: press the%
button on the multifunction steering wheel or pull away.
or
X To park using Active Parking Assist:
press the abutton on the multifunction
steering wheel.
The Park Assist active Accelerate
Park Assist active Accelerate
and and brake
brake Observe
Observe surroundings
surroundings mes-
sage appears in the multifunction display.
X Release the multifunction steering wheel.
X Reverse the vehicle, being ready to brake at
all times. When reversing, drive at a speed
below 10 km/h. Otherwise, Active Parking
Assist will be cancelled.
i In tight parking spaces, you will achieve
the best parking results by backing up as
far as possible. When doing so, also
observe the PARKTRONIC messages.
X Stop as soon as PARKTRONIC sounds the
continuous warning tone, if not before.
Manoeuvring may be required in tight park-
ing spaces.
The Park Assist active Select D
Park Assist active Select D
Observe Observe surroundings
surroundings message appears in
the multifunction display.
X Shift the transmission to position Dwhile
the vehicle is stationary.
Active Parking Assist immediately steers in
the other direction.
The Park Assist active Accelerate Park Assist active Accelerate
and
and brake
brake Observe
Observe surroundings
surroundings mes-
sage appears in the multifunction display.
i You will achieve the best results by wait-
ing for the steering procedure to complete before pulling away.
X Drive forwards and be ready to brake at all
times.
X Stop as soon as PARKTRONIC sounds the
continuous warning tone, if not before.
The Park Assist active Select R
Park Assist active Select R
Observe
Observe surroundings
surroundings message appears in
the multifunction display. 212
Driving systemsDriving and parking

Additional transmission shifts may be neces-
sary.
As soon as the parking procedure is com-
plete, the Park
Park Assist Assist switched
switched off
offmes-
sage appears in the multifunction display and
you will hear a tone. PARKTRONIC continues
to be available.
X Manoeuvre if necessary.
X Always observe the warning messages dis-
played by PARKTRONIC (Y page 208).
Parking tips: R The way your vehicle is positioned in the
parking space after parking is dependent
on various factors. These include the posi-
tion and shape of the vehicles parked in
front and behind it and the conditions of the
location. It may be the case that Active
Parking Assist guides you too far into a
parking space, or not far enough into it. In
some cases, it may also lead you across or
onto the kerb. If necessary, you should can-
cel the parking procedure with Active Park- ing Assist.
R You can also engage forward gear prema-
turely. The vehicle redirects and does not
drive as far into the parking space. Should a gear be changed too early, the parking pro-
cedure will be cancelled. A sensible parking position can no longer be achieved from
this position.
Cancelling Active Parking Assist You can cancel Active Parking Assist at any
time.
X Stop the movement of the multifunction
steering wheel or steer yourself.
Active Parking Assist will be cancelled at
once. The Park Assist cancelled
Park Assist cancelled mes-
sage appears in the multifunction display.
or X Press the PARKTRONIC button on the
centre console (Y page 209).
PARKTRONIC is switched off and Active
Parking Assist is immediately cancelled. The
Park Assist cancelled Park Assist cancelled message
appears in the multifunction display.
Active Parking Assist is cancelled automati-
cally if:
R the transmission is shifted too early
R the electric parking brake is applied
R transmission position Pis selected
R parking using Active Parking Assist is no
longer possible
R you are driving faster than 10 km/h
R a wheel spins and ESP ®
intervenes or fails.
In such cases the ÷warning lamp lights
up in the instrument cluster.
A warning tone sounds. The parking symbol
goes out and the Park Assist cancelled Park Assist cancelled
message appears in the multifunction dis-
play.
When Active Parking Assist is cancelled, you
must steer again yourself.
Towing a trailer For vehicles with a trailer tow hitch, the min-
imum length for parking spaces is slightly
increased.
If you have attached a trailer to your vehicle,
you should not use Active Parking Assist.
Once the electrical connection is established between your vehicle and the trailer, Active
Parking Assist is no longer available. PARK-
TRONIC is deactivated for the rear area. Driving systems
213Driving and parking Z

Additional display for vehicles with PARKTRONIC
: Front warning display
; Additional PARKTRONIC measurement
operational readiness indicator
= Rear warning display
Vehicles with PARKTRONIC: when PARK-
TRONIC is operational (Y page 207), addi-
tional measurement operational readiness
indicator ;appears in the COMAND display.
If the PARKTRONIC warning displays are
active or light up, warning displays :and =
are also active or light up correspondingly in
the COMAND display.
"Reverse parking" function Reversing straight into a parking space
without turning the steering wheel :
White guide line without turning the steer-
ing wheel, vehicle width including the
exterior mirrors (static)
; CLS Coupé: yellow guide line for the vehi-
cle width including the exterior mirrors,
for current steering wheel angle
(dynamic) ;
CLS Shooting Brake: red guide line for
the vehicle width including the exterior
mirrors, for current steering wheel angle
(dynamic)
= Yellow guide line at a distance of approx-
imately 1.0 mfrom the rear of the vehicle
? Red guide line at a distance of approx-
imately 0.30 mfrom the rear of the vehicle
(CLS Shooting Brake: 0.25 m)
X Make sure that the reversing camera is
switched on (Y page 214).
The lane and the guide lines are shown.
X With the help of white guide lines :, check
whether the vehicle will fit into the parking space.
X Using white guide lines :as a guide, care-
fully reverse until you reach the end posi-
tion.
Red guide line ?is then at the end of the
parking space. The vehicle is almost paral-
lel in the parking space.
Reverse perpendicular parking with the
steering wheel at an angle :
Parking space marking
; CLS Coupé: yellow guide line for the vehi-
cle width including the exterior mirrors,
for current steering wheel angle
(dynamic)
; CLS Shooting Brake: red guide line for
the vehicle width including the exterior
mirrors, for current steering wheel angle
(dynamic) 216
Driving systemsDriving and parking

"Coupling up a trailer" function
:
Vehicle centre point on the yellow guide
line at a distance of approximately 1.0 m
from the rear of the vehicle
; Trailer drawbar
This function is only available on vehicles with
a trailer tow hitch.
X Set the height of trailer drawbar ;so that
it is slightly higher than the ball coupling.
X Position the vehicle centrally in front of
trailer drawbar ;. :
Red guide line at a distance of approx-
imately 0.30 m from the ball coupling
; Trailer drawbar locating aid
= Trailer drawbar
? Symbol for the "Coupling up a trailer"
function
X Use the COMAND controller to select sym-
bol ?, see the separate operating instruc-
tions for COMAND Online.
The "Coupling up a trailer" function is selec- ted. The distance specifications now only apply to objects that are at the same level
as the ball coupling.
X Reverse carefully, making sure trailer draw-
bar locating aid ;points approximately in
the direction of the trailer drawbar.
X Reverse carefully until trailer drawbar =
reaches red guide line :.
The distance between the trailer drawbar
and the red guide line is now approximately
0.30 m.
X Couple up the trailer (Y page 235). ATTENTION ASSIST
General notes ATTENTION ASSIST helps you during long,
monotonous journeys such as on motorways and trunk roads. It is active in the 80 km/h to
180 km/h range.
If ATTENTION ASSIST detects typical indica-
tors of fatigue or increasing lapses in con-
centration on the part of the driver, it sug-
gests taking a break.
ATTENTION ASSIST assesses your level of
fatigue or lapses in concentration by taking
the following criteria into account:
R your personal driving style, e.g. steering
characteristics
R journey-related parameters, e.g. time of
day, length of journey
The functionality of ATTENTION ASSIST is
restricted, and warnings may be delayed or
not occur at all:
R if the road condition is poor, e.g. if the sur-
face is uneven or if there are potholes
R if there is a strong side wind
R if you have adopted a sporty driving style
with high cornering speeds or high rates of
acceleration
R if you are predominantly driving slower
than 80 km/h or faster than 180 km/h
R if you are currently using COMAND Online
or making a telephone call with COMAND
Online 218
Driving systemsDriving and pa
rking

R
if the time has been set incorrectly
R in active driving situations, such as when
you change lanes or change your speed
Important safety notes ATTENTION ASSIST is only an aid. It may not
always detect fatigue or lapses in concentra-
tion until too late, or may not detect them at
all. The system is not a substitute for a well-
rested and attentive driver.
Warning and display messages in the
multifunction display X
Activate ATTENTION ASSIST using the on-
board computer (Y page 250).
If ATTENTION ASSIST is active, you will be
warned no sooner than 20 minutes after
your journey has begun. You then hear an
intermittent warning tone twice and the
Attention Assist: Take a break!
Attention Assist: Take a break!
message appears in the multifunction dis-
play.
X If necessary, take a break.
X Press the abutton to confirm the mes-
sage.
On long journeys, take regular breaks in good time to allow yourself to rest properly. If you
do not take a break, you will be warned again
after 15 minutes at the earliest. This will only
happen if ATTENTION ASSIST still detects
typical indicators of fatigue or increasing lap-
ses in concentration.
When ATTENTION ASSIST is deactivated, the é symbol appears in the multifunction
display in the assistance graphic display.
ATTENTION ASSIST is reset and starts
assessing your tiredness again when you con- tinue your journey if:
R you switch off the engine
R you take off your seat belt and open the
driver's door, e.g. for a change of drivers or
to take a break Speed Limit Assist
General notes :
Speed Limit Assist camera
Speed Limit Assist shows you detected speed
limits in the multifunction display. Data from
the navigation system is also used for this
purpose. If a traffic sign indicating a speed
limit or the end of a speed limit is detected, it is shown in the multifunction display. If Speed
Limit Assist does not detect any traffic signs, the speed limit from the digital road map is
taken and shown in the display.
Speed Limit Assist detects the traffic signs
with a camera attached behind the top of the
windscreen.
i Speed Limit Assist is not operational in all
countries.
Important safety notes Speed Limit Assist is only an aid and does not
always detect traffic signs specifying the
maximum permissible speed. Traffic signs
always have priority over the Speed Limit
Assist display.
The system may be impaired or may not func-
tion if:
R there is poor visibility, e.g. due to snow,
rain, fog or spray
R there is glare, e.g. from the sun or from
oncoming traffic
R the windscreen is dirty, misted up or cov-
ered, for instance by a sticker, in the vicinity
of the camera Driving systems
219Driving and parking Z

R
the traffic signs are covered, for instance by
dirt, snow or trees
R the traffic signs are poorly illuminated
R there are ambiguous traffic signs, for
instance near roadworks or on multi-lane
roads
Information in the multifunction display :
Traffic sign indicating a speed limit or the
end of a speed limit (example)
; Units used in the traffic sign displayed
Briefly showing detected traffic signs in
the multifunction display
X Activate the Speed Limit Assist warning
function using the on-board computer
(Y page 249).
A traffic sign indicating a speed limit or the
end of a speed limit :appears in the mul-
tifunction display for approximately five
seconds as soon as it is detected. Any other
information in the multifunction display is
hidden for this period.
Permanently showing detected traffic
signs in the multifunction display
X Display the assistance graphic using the
on-board computer (Y page 249).
A traffic sign indicating a speed limit or the
end of a speed limit :appears in the mul-
tifunction display as soon as it is detected.
Traffic sign indicating a speed limit :is
generally displayed until:
R a traffic sign indicating the end of the
speed limit is detected
R you make a turn R
you leave or enter a town
R the road type changes (e.g. motorway,
country road)
R you have travelled a certain minimum
distance without the traffic sign being
repeated or detected again
i You can also activate Speed Limit Assist
using COMAND Online. The maximum per-
missible speed is shown in the COMAND
display; see the COMAND Online operating instructions. Night View Assist Plus
Important safety notes Night View Assist Plus is only an aid and is not
a substitute for attentive driving. Do not rely
on the Night View Assist Plus display. You areresponsible for the distance to the vehicle in
front, for vehicle speed and for braking in
good time. Drive carefully and always adapt
your driving style to suit the prevailing road
and traffic conditions.
Night View Assist Plus cannot display objects
directly in front of or beside the vehicle.
The system may be impaired or may not func-
tion if:
R there is poor visibility, e.g. due to snow,
rain, fog or spray
R the windscreen is dirty, misted up or cov-
ered, for instance by a sticker, in the vicinity
of the camera
R on bends, on uphill gradients or downhill
gradients
Pedestrian recognition may be impaired or
inoperative if:
R pedestrians are partially or entirely
obscured by objects, e.g. parked vehicles
R the silhouette of the pedestrian in the Night
View Assist Plus display is incomplete or
interrupted, e.g. by powerful light reflec-
tions 220
Driving systemsDriving an
d parking

Problems with Night View Assist Plus
Problem
Possible causes/consequences and
M
MSolutions The picture quality of
Night View Assist Plus
has deteriorated. The windscreen wipers are smearing the windscreen.
X Replace the wiper blades (Y page 134). The windscreen is smeared after the vehicle has been cleaned in a
car wash.
X Clean the windscreen (Y page 337). There is windscreen chip damage in the camera's field of vision.
X Replace the windscreen. The windscreen is misted up on the inside.
X Demist the windscreen (Y page 147). The windscreen is iced up.
X De-ice the windscreen (Y page 146). There is dirt on the inside of the windscreen.
X Clean the inside of the windscreen (Y page 337).Lane Tracking package
General notes The Lane Tracking package consists of Blind
Spot Assist (Y page 223) and Lane Keeping
Assist (Y page 225).
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
30 km/h. A warning display in the exterior
mirrors draws your attention 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. For monitoring,
Blind Spot Assist uses sensors in the rear
bumper. Important safety notes G
WARNING
Blind Spot Assist does not react to vehicles:
R overtaken too closely on the side, placing
them in the blind spot area
R when the difference in the speed of
approach and overtaking is too great
As a result, Blind Spot Assist cannot warn
drivers in these situations. There is a risk of an accident.
Always pay careful attention to the traffic sit- uation and maintain a safe distance at the side
of the vehicle.
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. Driving systems
223Driving and parking Z

Monitoring range of the sensors
In particular, the detection of obstacles can
be impaired in the case of:
R dirt on the sensors or obscured sensors
R poor visibility, e.g. due to fog, heavy rain,
snow or spray
R narrow vehicles, e.g. motorcycles or bicy-
cles
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. CLS Coupé
Blind Spot Assist monitors the area up to
3.0 mbehind your vehicle and directly next to
your vehicle, as shown in the diagram.
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 there are vehicles at the edge of
their lane nearest your vehicle. Due to the nature of the system:
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 long vehicles, for example lor-
ries, for a prolonged time
The two radar sensors for Blind Spot Assist
are integrated 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 sensors must not be covered, for exam-
ple by cycle racks or overhanging loads. Fol-
lowing a severe impact or in the event of dam- age to the bumpers, have the function of the
sensors checked at a qualified specialist
workshop. Blind Spot Assist may otherwise
not work properly.
Indicator and warning display :
Yellow indicator lamp/red warning lamp
Blind Spot Assist is not active at speeds below approximately 30 km/h. Vehicles in the mon-
itoring range are then not indicated.
If Blind Spot Assist is activated, indicator
lamp :in the exterior mirrors lights up yel-
low up to a speed of 30 km/h. At speeds
above 30 km/h, the indicator lamp goes out
and 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
always occurs when a vehicle enters the blind
spot monitoring range from behind or from 224
Driving systemsDriving and parking