2014 MERCEDES-BENZ CLA sensor

Problems with PARKTRONIC
ProblemPossible causes/consequences and
Solutions
Only the red segments
in the PARKTRONIC
warning displays are lit.
You also hear a warning
tone for approximately
two seconds.
PARKTRONIC is then
deactivated and the
indicator lamp on the
PARKTRONIC button
lights up.
PARKTRONIC has malfunctioned and has switched off.
XIf problems persist, have PARKTRONIC checked at a qualified
specialist workshop.
Only the red segments
in the PARKTRONIC
warning displays are lit.
PARKTRONIC is then
deactivated.
The PARKTRONIC sensors are dirty or there is interference.
XCleanthe PARKTRONIC sensors (Ypage 289).
XSwitch the ignition back on.
The problem may be caused by an external source of radio or
ultrasound waves.
XSee if PARKTRONIC functions in a different location.
Active Parking Assist
General notes
Active Parking Assist is an electronic parking
aid with ultrasound. It measures the road on
both sides of the vehicle.Aparking symbol
indicates a suitable parking space. Active
steering interventioncan assistyou during
maneuvering and parking. You may also use
PARKTRONIC (Ypage 175).
Important safety notes
Active Parking Assist is merely an aid. It is not
a replacement for your attention to your
immediate surroundings. You are always
responsible for safe maneuvering, parking
and exiting a parking space. Make sure that
no persons, animals or objects are in the
maneuvering range.
When PARKTRONIC is switched off, Active
Parking Assist is also unavailable.
GWARNING
While parking or pulling out of a parking
space, the vehicle swings out and can drive
onto areas of the oncoming lane. This could
result in a collision with another road user.
There is a risk of an accident.
Pay attention to other road users. Stop the
vehicle if necessary or cancel the Active
Parking Assist parking procedure.
!If unavoidable, you should drive over
obstacles such as curbs slowly and not at
a sharp angle. Otherwise, you may damage
the wheels or tires.
Active Parking Assist may possibly indicate
parking spaces which are not suitable for
parking, for example:
Rwhere parking or stopping is prohibited
Rin front of driveways or entrances and exits
Ron unsuitable surfaces
178Driving systems
Driving and parking

information in the multifunction display is
hidden for this period.
Speed Limit Assist is available and
switched on
Traffic sign indicatingaspeed limit or the
end of a speed limit (example)
"Own vehicle
Permanently showing detected traffic
signs in the multifunction display
XDisplay the assistance graphic using the
on-board computer (Ypage 203).
Atraffic sign indicating a speed limitorthe
end of a speed limitappears in the
multifunction display as soon as it is
detected.
Traffic sign indicating a speed limitis
generally displayed until:
Ra traffic sign indicating the end of the
speed limit is detected.
Ryou make a turn.
Ryou leave or enter a city.
Rthe road type changes (e.g. freeway,
country road).
Ryou have traveled a certain minimum
distance without the traffic sign being
repeated or detected again.
iYou can also activate Speed Limit Assist
using COMAND. The maximum permissible
speed is shown in the COMAND display;
see the COMAND Operating Instructions.
Lane Tracking package
General notes
The Lane Tracking package consists of Blind
Spot Assist (Ypage 188) and Lane Keeping
Assist (Ypage 190).
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 a speed of
approximately 20 mph(30 km/h). A warning
display in the exteriormirrors draws your
attention to vehicles detected in the
monitored area. If you then switch on the
corresponding turnsignal to change lanes,
you will also receive a visual and audible
collision warning. For this purpose, Blind Spot
Assist uses sensors in the rear bumper.
Important safety notes
GWARNING
Blind Spot Assist does not react to:
Rvehicles overtaken too closely on the side,
placing theminthe 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
carefully, 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.
iUSA only:
This device has been approved by the FCC
as a "VehicularRadar System". The radar
sensor is intended for use in an automotive
radar system only. Removing, tampering
with, or altering the device will void any
warranties, and is notpermitted by the
188Driving systems
Driving and parking

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 if:
Rdirt on the sensors or anything else
covering the sensors
Rthere is poor visibility, e.g. due to fog, heavy
rain or snow
Ra narrow vehicle traveling in front, e.g. a
motorbike or bicycle
Rthe road has very wide lanes
Rthe road has narrow lanes
Ryou are not driving in the middle of the lane
Rthere are barriers or similar lane borders
Vehicles in the monitoring range are then not
indicated.
Blind Spot Assist monitors the area up to
10 ft(3.0m)behind your vehicle and directly
nextto your vehicle, as shown in the diagram.
For this purpose, Blind Spot Assist uses radar
sensors in the rear bumper.
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:
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, e.g.
trucks, for a prolonged time.
The two 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 vicinityofthe sensors. For
example, the radar sensors must not be
covered by bicycle racks or overhanging
loads. Following a severe impact or in the
event of damage to the bumpers, have the
function of the radar sensors checked at a
qualified specialist workshop. 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.
Yellow indicator lamp/red warning lamp
When Blind Spot Assist is activated, indicator
lampin the exterior mirrors lights up
yellow at speeds of up to 20 mph(30km/h).
At speeds above 20 mph (30 km/h), the
indicator lamp goes out and Blind Spot Assist
is operational.
If a vehicle is detected withinthe monitoring
range of Blind Spot Assist at speeds above
Driving systems189
Driving and parking
Z

Useful information
iThis Operator's Manual describes all
models and all standard and optional
equipment of your vehicle available at the
time of publication of the Operator's
Manual. Country-specific differences are
possible. Please note that your vehicle may
not be equipped with all features
described. This also applies to safety-
related systems and functions.
iRead the information on qualified
specialist workshops: (Ypage 25).
Important safety notes
GWARNING
If you operate information systems and
communication equipment integrated in the
vehicle 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
situationpermits.Ifyou are not sure that this
is possible, park the vehicle paying attention
to traffic conditions and operate the
equipment when the vehicle is stationary.
GWARNING
If the instrument cluster has failed or
malfunctioned, 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
immediately.
You must observe the legal requirements for
the country in which you are currently driving
when operating the on-board computer.
The on-board computer only shows messages
or warnings from certain systems in the
multifunction display.You should therefore
make sure your vehicle is operating safely at
all times. Otherwise, a vehicle that is not
operating safely may cause an accident.
For an overview, see the instrument panel
illustration (Ypage 29).
Displays and operation
Instrument cluster lighting
The lighting in the instrument cluster, in the
displays and the controls in the vehicle
interior can be adjusted using the brightness
control knob.
The brightness control knob is located on the
bottom left of the instrument cluster
(Ypage 29).
XTurn the brightness control knob clockwise
or counter-clockwise.
If the light switch is set to,or
, the brightness is dependent upon
the brightness of the ambient light.
iThe light sensor in the instrument cluster
automatically controls the brightness of
the multifunction display.
In daylight, the displays in the instrument
cluster are not illuminated.
Coolant temperature display
GWARNING
Opening the hood when the engine is
overheated or when there is a fire in the
engine compartment could expose you to hot
gases or other service products. There is a
risk of injury.
Let an overheated engine cool down before
opening the hood. If there is a fire in the
engine compartment, keep the hood closed
and contact the fire department.
!Adisplay message is shown if the coolant
temperature is too high.
194Displays and operation
On-board computer and displays

multifunction display in the assistance
graphics display.
For further information about ATTENTION
ASSIST, see (Ypage 186).
Activating/deactivating Blind Spot
Assist
XPress theorbutton on the
steering wheel to select theDriveAssist
menu.
XPress theorbutton to select
Blind Spot Assist.
XPress thebutton.
The current selection is displayed.
XTo activate/deactivate:press the
button again.
For further information about Blind Spot
Assist, see (Ypage 188).
When theBlind Spot Assist: Sensors
Deactivatedmessage is shown, the radar
sensors are deactivated.
XSwitch on the radarsensor system
(Ypage 208).
Activating/deactivating Lane Keeping
Assist
XPress theorbutton on the
steering wheel to select theDriveAssist
menu.
XPressorto selectLane
Keeping Assist.
XPress thebutton.
The currentselection is displayed.
XPressto confirm.
XPress theorbutton to setOff,
StandardorAdaptive.
XPress thebutton to save the setting.
When Lane Keeping Assist is activated, the
multifunction display shows the lane
markings as bright lines in the assistance
graphic.
For further information about Lane Keeping
Assist, see (Ypage 190).
Maintenance menu
In theServicemenu, you have the following
options:
RCalling up display messages in message
memory (Ypage 212)
RChecking the tire pressure electronically
(Ypage 320)
Restarting the tire pressure loss warning
system (Canada only) (Ypage 319)
RCalling up the service due date
(Ypage 284)
Settings menu
Introduction
In theSettingsmenu, you have the following
options:
RChanging the instrument cluster settings
RChanging the light settings
RChanging the vehicle settings
RChanging the convenience settings
RRestoring the factory settings
Menus and submenus205
On-board computer and displays
Z

iDepending on your vehicle'sequipment,
when the surround lighting and delayed
switch-offexterior lighting are on, the
following light up:
RParking lamps
RFront fog lamps
RLow-beam headlamps
RDaytime running lamps
RSide marker lamps
RSurround lighting in the exterior mirrors
Activating/deactivating the interior
lighting delayedswitch-off
If you activate theInterior Lighting
Delayfunction, the interior lighting remains
on for 20 seconds after you remove the key
from the ignition lock.
XPress theorbutton on the
steering wheel to select theSettings
menu.
XPress theorbuttonto select the
Lightssubmenu.
XPressto confirm.
XPress theorbutton to select the
Interior Lighting Delayfunction.
If theInteriorLightingDelayfunction
has been switched on, the vehicle interior
is displayed in orange in the multifunction
display.
XPress thebutton to save the setting.
Vehicle
Activating/deactivating the automatic
door locking mechanism
XPress theorbutton on the
steering wheel to select theSettings
menu.
XPress theorbutton to select the
Vehiclesubmenu.
XPressto confirm.
XPress theorbutton to select the
Automatic Door Lockfunction.
When theAutomaticDoorLockfunction
is activated, the vehicle doors are displayed
in orange in the multifunction display.
XPress thebutton to save the setting.
If you activate theAutomatic Door Lock
function, the vehicle is centrally locked above
a speed of around 9 mph (15 km/h).
For further information on the automatic
locking feature, see (Ypage 79).
Activating/deactivating the acoustic
locking verification signal
If you switch on theAcousticLockfunction,
an acoustic signal sounds when you lock the
vehicle.
XPress theorbutton on the
steering wheel to select theSettings
menu.
XPress theorbutton to select the
Vehiclesubmenu.
XPressto confirm.
XPress theorbutton to select the
Acoustic Lockfunction.
If theAcousticLockfunction is activated,
the\nsymbol in the multifunction
display lights up orange.
XPress thebutton to save the setting.
Activating/deactivating the radar sensor
system
XPress theorbutton on the
steering wheel to select theSettmenu.
XPress theorbutton to select the
Vehiclesubmenu.
XPressto confirm.
XPress theorbutton to select
Radar Sensor (See Oper. Manual).
You will see the selected setting:Onor
Off.
XPress thebutton to save the setting.
208Menus and submenus
On-board computer and displays

Display messagesPossible causes/consequences and
Solutions

Check Rear Left
Sidemarker Lampor
Check Rear Right
Sidemarker Lamp
The rear leftorright side marker lamp is defective.
XCheck whether you are permitted to replace the bulb yourself
(Ypage 111).
or
XVisit a qualified specialist workshop.

CheckLeftDaytime
Running Lightor
Check Right
Daytime Running
Light
The left-hand or right-hand daytime running lamp is faulty.
XCheck whether you are permitted to replace the bulb yourself
(Ypage 111).
or
XVisit a qualified specialist workshop.

Active Light
System Inoperative
The active light function is defective.
XVisit a qualified specialist workshop.

Malfunction See
Operator's Manual
The exterior lighting is defective.
XVisit a qualified specialist workshop.

AutoLampFunction
Inoperative
The light sensor is defective.
XVisit a qualified specialist workshop.

Switch Off Lights
The lights are still switched on when you leave the vehicle. A
warning tone also sounds.
XTurn the light switch to.
Adaptive Highbeam
Assist Inoperative
Adaptive Highbeam Assist is faulty.
XVisit a qualified specialist workshop.
Adaptive Highbeam
Assist Currently
Unavailable See
Operator's Manual
Adaptive Highbeam Assist is deactivated and temporarily
inoperative. Possible causes are:
Rthe windshield in the camera's field of vision is dirty.
Rvisibility is impaired due to heavy rain, snow or fog.
XClean the windshield.
If the system detects that the camera is fully operational again,
theAdaptive Highbeam Assist Now Availablemessage is
displayed.
Adaptive Highbeam Assist is operational again.
226Display messages
On-board computer and displays

Display messagesPossible causes/consequences and
Solutions
SpeedLimitAssist
Inoperative
Speed Limit Assistis faulty.
XVisit a qualified specialist workshop.

Off
The HOLD function is deactivated. The vehicle is skidding.
Awarning tone also sounds.
XReactivate the HOLD function later (Ypage 172).
The HOLD function is deactivated. When the brakepedal is firmly
depressed, an activation condition is not fulfilled.
Awarning tone also sounds.
XCheck the activation conditions for the HOLD function
(Ypage 172).
Radar Sensors
Deactivated See
Operator's Manual
The radar sensor system is deactivated.
XSwitch on the radar sensor system (Ypage 208).
Lane Keeping
Assist Currently
Unavailable See
Operator's Manual
Lane Keeping Assist is deactivated and temporarily inoperative.
Possible causes are:
Rthe windshield in the camera's field of vision is dirty.
Rvisibility is impaired due to heavy rain, snow or fog.
Rthere are no lane markings for a longer period.
Rthe lane markings are worn, dark or covered, e.g.by dirtorsnow.
Whenthe causes stated above no longer apply, the display
message disappears.
Lane Keeping Assist is operational again.
If the display message does not disappear:
XPull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
XSecure the vehicle against rolling away (Ypage 153).
XCleanthe windshield.
Lane Keeping
Assist Inoperative
Lane Keeping Assist is faulty.
XVisit a qualified specialist workshop.
230Display messages
On-board computer and displays