2018 MERCEDES-BENZ CLA warning light

If contact is made with ar oof carrier approved
by Mercedes-Benz, the sliding sunroof lowers
slightly but remains raise datt he rear.
Rain-closing feature The rain-closing feature is only available for vehi-
cles with ar ain sensor.
When the SmartKey is in position Z in the igni-
tion lock or is removed, the sliding sunroof
closes automatically: R
if it starts to rain. R
at extreme outsid et emperatures.R
after six hours. R
if there is am alfunction in the powe rs upply.
The panorama roof with powe rt ilt/sliding panel
remains raise datt he rear in order to allow ven-
tilation of the vehicle interior.
If the panorama roof with powe rt ilt/sliding
panel is obstructed whil eb eing closed by the
rain-closing feature, it opens again slightly. The
rain-closing feature is then deactivated.
The panorama roof with powe rt ilt/sliding panel
does not close if: R
it is raise datt he rear.R
it is blocked. R
no rain is falling on the area of the windshield
being monitored by the rain sensor. If the
vehicle ,f or example ,isu nder ab ridge or in a
carport, the field of the sensor may be cov-
ered.
Operating the rolle rs unblind for the
panorama roof with powe rt ilt/sliding
panel
Important safety notes
G WARNING
Parts of the body could become trapped
betwee nt he rolle rs unblind and frame or slid-
ing sunroof during automatic opening or clos-
ing. There is ar isk of injury.
When opening or closing, make sure that no
body parts are in the sweep of the rolle rs un-
blind. If somebod yb ecomes trapped: R
release the switch immediately ,o rR
during automatic operation, push the
switch briefl yina ny direction
The opening or closing procedure wil lbes top-
ped.
The rolle rs unblind shields the vehicle interior
from sunlight. The rolle rs unblind can only be
opened and closed when the panorama roof
with powe rt ilt/sliding panel is closed.
Rolle rs unblind reversin gf eatureThe rolle rs unblind is equipped with an auto-
matic reversing feature. If as olid object blocks
or restricts the rolle rs unblind during the closing
process, the rolle rs unblind opens again auto-
matically. The automatic reversing feature is
only an aid and is not as ubstitute for you ra tten-
tiveness when closing the rolle rs unblind.
G WARNING
The reversing feature does not react: R
to soft, ligh ta nd thin objects, e.g. small fin-
gers R
when closing the rolle rs unblind again man-
ually immediately after automatic reversal
This means that the reversing feature cannot
prevent someone being trapped in these sit-
uations. There is ar isk of injury.
When closing the rolle rs unblind, make sure
that no body parts are in the sweep area.
If somebod yb ecomes trapped: R
release the switch immediately ,o rR
press the switch in any direction during the
automatic closing process
The closing process is stopped.Panorama roof with powe rt ilt/sliding panel 87
Opening and closing Z

Problems with the panorama roof with power tilt/sliding panel
G WARNING
If you do not reset the sliding sunroof after am alfunction or voltage supply interruption, then the
backing up function will malfunction or not work. The sliding sunroof closes with increased or
maximum force. Parts of the body could be trapped in the closing area in the process. This poses
an increased risk of injury or even fatal injury.
In such or similar situations always make sure that no parts of the body are in the closing area.
Always reset the sliding sunroof after am alfunction or voltage supply interruption.
! If the sliding sunroof still cannot be opened or closed as ar esult of am alfunction ,c ontact a
qualified specialist workshop.
Problem
Possible causes/consequences and P Solutions
The panorama roof with
power tilt/sliding panel
cannot be closed and
you cannot see the
cause. If the panorama roof with power tilt/sliding panel is obstructed during
closing and reopens again slightly: X
Immediately after it blocks, pull the W switch down again to the
point of resistance until the panorama roof with power tilt/sliding
panel is closed.
The panorama roof with power tilt/sliding panel is closed with more
force.
If the panorama roof with power tilt/sliding panel is obstructed again
during closing and reopens again slightly: X
Immediately after it blocks, pull the W switch down again to the
point of resistance until the panorama roof with power tilt/sliding
panel is closed.
The panorama roof with power tilt/sliding panel is closed without
the automatic reversing feature.Panoram ar oof with power tilt/sliding panel 89
Opening and closing Z

Problems with the seat heating Problem
Possible causes/consequences and P Solutions
The seat heating has
switched off prematurely
or cannot be switched
on. The on-board voltage is too low because too many electrical consum-
ers are switched on. X
Switch off electrical consumers that you do not need, such as the
rear window defroster or interior lighting.
Once the battery is sufficiently charged, the seat heating will switch
back on automatically.
Steering wheel
Important safety notes
G WARNING
You could lose control of your vehicle if you do
the following while driving: R
adjust the driver's seat, head restraint,
steering wheel or mirrors R
fasten the seat belt
There is ar isk of an accident.
Adjust the driver's seat, head restraint ,s teer-
ing wheel and mirror and fasten your seat belt
before startin gt he engine.
G WARNING
Children could injure themselves if they
adjust the steering wheel. There is ar isk of
injury.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. Never
leave children unsupervised in the vehicle.
Adjusting the steering wheel
G WARNING
If the steering wheel is unlocked while the
vehicle is in motion, it could change position
unexpectedly. This could cause you to lose
control of the vehicle. There is ar isk of an
accident.
Before startin go ff, make sure the steering
wheel is locked. Never unlock the steering
wheel while the vehicle is in motion. C
Release lever D
Adjust st he steering wheel height

Mirrors
Rear-view mirror X
Anti-glare mode: flick anti-glare lever C for-
wards or back.
Exterior mirrors
Adjusting the exterior mirrors
G WARNING
You coul dl ose control of you rv ehicl eify ou do
the following while driving: R
adjust the driver's seat, hea dr estraint,
steering whee lorm irrorsR
fasten the seat belt
There is ar isk of an accident.
Adjust the driver's seat, hea dr estraint, steer-
ing whee la nd mirror and fasten you rs eat belt
before starting the engine.
G WARNING
The exterior mirror on the front-passenger
side reduces the size of the image. Visible
objects are actually closer than they appear.
This means that you coul dm isjudge the dis-
tance from road users traveling behind, e.g.
when changing lane .T here is ar isk of an acci-
dent.
For this reason, alway sm ake sure of the
actua ld istance from the road users traveling
behind by glancing over you rs houlder. X
Turn the SmartKey to position G or H in the
ignitio nl ock ( Y
pag e1 22).X
Exterior mirror on the front-passenger side:
press button D .
Exterior mirror on the driver's side :p ress but-
ton C .
The indicator lamp in the corresponding but-
ton lights up in red.
The indicator lamp goes out again after some
time. You can adjust the selected exterior
mirror using button

i If you activate the residual heat function at
high temperatures, only the ventilation wil lb e
activated. The blower runs at mediu ms peed.
i You cannot use the ventilation to cool the
vehicle interior to at emperature lowe rt han
the outsid et emperature.
Activating/deactivating X
Turn the SmartKey to position Z in the igni-
tion lock or remove it ( Y
page 122).X
Press the K button.
The indicator lamp in the K button lights
up or goes out.
The indicator lamp in the button indicates that
the respective function is activated.
i Residua lh eat is deactivated automatically:R
after approximately 30 minutes R
when the ignition is switched on R
if the battery voltage drops
Air vents
Important safety notes
G WARNING
Very hot or very cold air can flow from the air
vents. This could resul tinb urns or frostbite in
the immediate vicinity of the air vents. There
is ar isk of injury.
Make sure that all vehicle occupants always
maintain as ufficient distance to the air out-
lets. If necessary ,r edirect the airflow to
another area of the vehicle interior.
In order to ensure the direct flow of fresh air
through the air vents into the vehicle interior,
please observe the following notes: R
keep the air inlet between the windshield and
the hood free of blockages, such as ice, snow
or leaves. R
never cover the air vents or air intake grilles in
the vehicle interior.
i For optimal climate control in the vehicle,
open the air vents completely and set the
adjusters to the central position. Setting the air vents
C
Side window defroster vent D
Side air vent X
To open as ide air vent: turn the adjuster in
side air vent D to the left. X
To close as ide air vent: turn the adjuster in
side air vent D clockwise as far as it wil lg o.
i The center and rear air vents are adjusted in
the same way.120
Ai rv ents
Climate control

operates independently of the ECO start/stop
automatic engine switch-off function.
Key positions with the Start/Stop button
C
Start/Stop buttonD
Ignition lock
As soon as the ignition is switched on, all the
indicator lamps in the instrument cluster light
up.
For further information on situations in which an
indicator lamp either fails to go out after the
engine is started or lights up while driving,
please refer to "Warning and indicator lamps in
the instrument cluster" ( Y
page 219).
If Start/Stop button C has not yet been
pressed, this is the same as the SmartKey being
removed from the ignition. X
To switch on the power supply: press
Start/Stop button C once.
The power supply is switched on. You can now
activate the windshield wipers, for example.
The power supply is switched off again if: R
the driver's door is opened and R
you press Start/Stop button C twice when in
this position X
To switch on the ignition: press Start/Stop
button C twice.
The ignition is switched on.
If you press Start/Stop button C once when
in this position, the ignition is switched off
again.
Removing the Start/Stop button
You can remove the Start/Stop button from the
ignition lock and start the vehicle as normal
using the SmartKey.
You can only switch between Start/Stop button
mode and SmartKey operation when the vehicle
is stationary. You must also engage park position ] .X
Remove Start/Stop button C from ignition
lock D .
You do not have to remove the Start/Stop but-
ton from the ignition lock when you leave the
vehicle. You should, however, alway st ake the
SmartKey with you when leaving the vehicle. As
long as the SmartKey is in the vehicle: R
the vehicle can be started using the Start/
Stop button R
the electrically powered equipment can be
operated
Starting the engine
Important safety notes
G WARNING
If children are left unsupervised in the vehicle,
they could: R
open the doors, thus endangering other
people or road users. R
get out and disrupt traffic. R
operate the vehicle's equipment.
Additionally, children could set the vehicle in
motion if, for example, they: R
release the parking brake. R
shifting the automatic transmission out of
park position P R
Start the engine.
There is ar isk of an accident and injury.
When leaving the vehicle, alway st ake the
SmartKey with you and lock the vehicle. Never
leave children or animals unattended in the
vehicle. Always keep the SmartKey out of
reach of children.
G WARNING
Combustion engines emit poisonous exhaust
gases such as carbon monoxide. Inhaling
these exhaust gases leads to poisoning. There
is ar isk of fatal injury. Therefore never leave
the engine runnin gine nclosed spaces with-
out sufficient ventilation. Driving 123
Driving and parking Z

Problem
Possible causes/consequences and P Solutions
The engine does not
start. You cannot hear
the starter motor. The on-board voltage is too low because the battery is too weak or
discharged. X
Jump-start the vehicle ( Y
page 278).
If the engine does not start despite attempt stoj ump-start it:X
Consult aq ualified specialist workshop.
The starter motor was exposed to at hermal load that was too high.X
Allow the starter motor to cool down for approximately two minutes. X
Try to start the engine again.
If the engine still does not start: X
Consult aq ualified specialist workshop.
The engine is not running
smoothly and is misfir-
ing. There is am alfunction in the engine electronics or in am echanical
componen toft he engine management system.X
Only depress the accelerator pedal slightly.
Otherwise, non-combusted fuel may get into the catalytic converter
and damage it. X
Have the cause rectified immediately at aq ualified specialist work-
shop.
The coolant temperature
gauge shows av alue
above 248 ‡( 120 †).
The coolant warning
lamp may also be on and
aw arning tone may
sound. The coolant level is too low. The coolant is too hot and the engine is no
longer being cooled sufficiently. X
Stop as soon as possible and allow the engine and the coolant to
cool down. X
Check the coolant level ( Y
page 260). Observe the warning notes
as you do so and add coolant if necessary.
DYNAMIC SELEC Tb utton (all vehicles
except Mercedes-AMG vehicles) Use the DYNAMIC SELECT button to change the
drive program. Depending on the drive program
selected the following vehicle characteristics
will change: R
the drive (engine and transmission manage-
ment) R
the suspension (vehicles with damping sys-
tem or AMG adaptive sport suspension sys-
tem) R
the steering R
the availability of the ECO start/stop function R
the climate control:
Each time you start the engine with the Smart-
Key or the Start/Stop button, drive program C is
activated. For further information about starting
the engine, see ( Y
page 125). X
Press DYNAMIC SELECT button C as many
times as necessary until the desired drive
program is selected.
The selected drive program appears in the
multifunction display .A fter five seconds the
display goes out and the status icon of the
selected drive program appears.128
DYNAMIC SELECT button (all vehicles except Mercedes-AMG vehicles)
Driving and parking

the SmartKe yf ro mt he ignition, the automatic
transmission shifts to ] automatically.
With the Start/Sto pb utton: if yo ut he no pe n
the driver's door or the front-passenge rd oo r,
the automatic transmission shifts to ] auto-
matically.
If yo uw an tt he automatic transmission to
remai ninn eutral \\ ,e .g .w he nh av in gt he vehi-
cle cleane dinana ut omatic car wash with a
towing system: X
Vehicle sw it ht he Start-Sto pb utton:
remove the Start-Stop button fro mt he igni-
tio nl oc k.X
Insert the SmartKe yi nto the ignition lock.X
Al lv eh icles: switch the ignition on.X
Depres st he brake peda la nd kee pi t
depressed. X
Engage neutral \\ .X
Releas et he brake pedal.X
Releas et he electri cp ar king brake.X
Switch off the ignition and leav et he SmartKey
in the ignition lock.
Electric parking brake
General notes
G WARNING
If yo ul eave children unsupervised in the vehi-
cle ,t he yc ould se titinm otion by ,f or example:R
release the parking brake. R
shift the automatic transmission ou toft he
parking position P .R
start the engine.
In addition, the ym ay operate vehicl ee quip-
ment and become trapped .T here is ar is ko f
an accident and injury.
When leaving the vehicle, always take the
SmartKe yw it hy ou and lock the vehicle. Never
leav ec hildren unsupervised in the vehicle. The functio noft he electric parking brake is
dependent on the on-board voltage. If the on-
boar dv oltag eisl ow or there is am al functio ni n
the system, it ma yn ot be possibl etoa pply the
release dp ar king brake. X
If thi sist he case, onl yp ar kt he vehicl eo n
level ground and secur eittop revent it rolling
away. X
Shift the automatic transmission to position
] .
It ma yn ot be possibl etor elease an applied
parking brake if the on-board voltag eisl ow or
there is am al functio nint he system. Contact a
qualified specialis tw or kshop.
The electric parking brake performs af un ction
tes tatr egular intervals whil et he engine is
switched off .T he sound st ha tc an be he ar dw hile
thi siso ccurring ar en ormal.
Applyin gorr eleasing manually
X
To engage: push handle C .
When the electric parking brake is applied,
the red I (USA only) or $ (Canada
only) indicator lamp lights up in the instru-
ment cluster.
Th ee le ctric parking brake can also be applied
when the SmartKe yisr emoved.X
To release: pull handle C .
The red I (USA only) or $ (Canada
only) indicator lamp in the instrument cluster
goes out.
Th ee le ctric parking brake can onl yb e
released: R
if the SmartKe yisinp osit ion G or H in
the ignition lock ( Y
page 122 )o rR
if the ignition wa ss wi tched on using the
Start/Stop button142
Parking
Driving an dp arking