2014 MERCEDES-BENZ CLA battery

ProblemPossible causes/consequences and
Solutions
The engine cannot be
started using the
SmartKey.
The on-board voltage is too low.
XSwitch off non-essential consumers, e.g. seat heating or interior
lighting, and try to start the engine again.
If this does not work:
XCheck the starter battery and charge it if necessary
(Ypage 299).
or
XJump-start the vehicle (Ypage 303).
or
XConsult a qualified specialist workshop.
The engine cannot be
started using the
SmartKey.
The steering lock is mechanically blocked.
XRemove the SmartKey and reinsert it into the ignition lock. While
doing this, turn the steering wheel in both directions.
Doors
Important safety notes
GWARNING
If children are left unsupervised in the vehicle,
they could:
Ropen the doors, thus endangering other
people or road users.
Rget out and disrupt traffic.
Roperate the vehicle's equipment.
Additionally, children could set the vehicle in
motion if, for example, they:
Rrelease the parking brake.
Rshifting the automatic transmission out of
park positionP
RStart the engine.
There is a risk of an accident and injury.
When leaving the vehicle, always take 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.
GWARNING
If persons, particularly children are subjected
to prolonged exposure to extreme heat or
cold, there is a risk of injury, possibly even
fatal. Never leave children unattended in the
vehicle.
You should preferably place luggage or loads
in the cargo compartment. Observe the
loading guidelines (Ypage 254).
Unlocking and opening doors from
the inside
iWhen a door is opened, the side window
on that side opens slightly. When the door
is closed, the side window closes again.
!The side windows will not open/close if
the battery is discharged or if the side
windows have iced up. It will then not be
possible to close the door. Do not attempt
to force the door closed. You could
otherwise damage the door or the side
window.
Doors77
Opening and closing
Z

Emergency release
If the trunk lid can no longer be opened from
outside the vehicle, use the emergency
release on the inside of the trunk lid.
!The trunk lid swings upwards when
opened. Therefore, make sure that there is
sufficient clearance above the trunk lid.
iThe opening dimensions of thetrunk lid
can be found in the "Vehicle data" section
(Ypage 351).
You can reach the emergency release via the
trunk. Fold the rear backrests forward
(Ypage 258).
XInsert suitable tool, e.g. a screwdriver,
horizontally on the left-hand side into
emergency release slot.
XPush toolevenly in the direction of the
arrow and open the trunk lid.
iWhen you lock the vehicle (Ypage 79),
the trunk is also locked.
Emergency release button
You can open the trunk lid from inside the
vehicle with the emergency release button.
XPress emergency release buttonbriefly.
The trunk lid unlocks and opens.
The trunk lid can be unlocked and opened
with the trunk lid emergency release when
the vehicle is stationary or while driving.
The trunk lid emergency release does not
open the trunk lid if the battery is
disconnected or discharged.
Trunk lid emergency release light:
Remergency release buttonflashes for
30 minutes after the trunk lid is opened
Remergency release buttonflashes for
60 minutes after the trunk lid is closed.
Side windows
Important safety notes
GWARNING
While opening the side windows, body parts
in the closing area could become trapped.
There is a risk of injury.
Make sure that no body parts are in close
proximity during the closing procedure. If
somebody becomes trapped, release the
switch or press the switch to open the side
window again.
GWARNING
If children operate the side windows they
could become trapped, particularly if they are
left unsupervised. There is a risk of injury.
Activate the override feature for the rear side
windows. When leaving the vehicle, always
82Side windows
Opening and closing

To raise the backrest contour
To soften the backrest contour
"To lower the backrest contour
!To harden the backrest contour
Switching the seat heating on/off
Activating/deactivating
GWARNING
Repeatedly switching on the seat heating can
cause the seat cushion and backrest pads to
become very hot. The health of persons with
limited temperature sensitivity or a limited
ability to react to excessively high
temperatures may be affected or they may
even suffer burn-like injuries. There is a risk
of injury.
Therefore, do not switch the seat heating on
repeatedly.
The three red indicator lamps in the button
indicate the heating level you have selected.
The system automatically switches down
from level3to level2after approximately
eight minutes.
The system automatically switches down
from level2to level1after approximately ten
minutes.
The system automatically switches off
approximately 20 minutes after it is set to
level1.
XTurn the SmartKey to position1or2in the
ignition lock (Ypage 137).
XTo switch on:press buttonrepeatedly
until the desired heating level is set.
XTo switch off:press buttonrepeatedly
until all the indicator lamps go out.
iIf the battery voltage is too low, the seat
heating may switch off.
Seats95
Seats, steering wheel and mirrors
Z

Problems with the seat heating
ProblemPossible causes/consequences and
Solutions
The seat heating has
switched off
prematurely or cannot
be switched on.
The on-board voltage is too low because too many electrical
consumers are switched on.
XSwitch 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.
AMG Performance Seat
To adjust the contour of the seat and for
improved lateral support, you can individually
adjust the front seats.
Adjusting the seat cushion length
XTo extend the seat cushion:press
button.
XTo retract the seat cushion:press
button.
Adjusting the side bolsters of the seat
cushion
XTo set the side bolsters of the seat
cushion narrower:press button".
XTo set the side bolsters of the seat
cushion wider:press button!.
Adjusting the seat backrest side
bolsters
XTo set the side bolsters of the seat
cushion narrower:press button.
XTo set the side bolsters of the seat
cushion wider:press button .
Steering wheel
Important safety notes
GWARNING
You could lose control of your vehicle if you
do the following while driving:
Radjust the driver's seat, head restraint,
steering wheel or mirrors
Rfasten the seat belt
There is a risk of an accident.
Adjust the driver's seat, head restraint,
steering wheel and mirror and fasten your
seat belt before starting the engine.
GWARNING
Children could injure themselves if they
adjust the steering wheel. There is a risk of
injury.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. Never
leave children unsupervised in the vehicle.
96Steering wheel
Seats, steering wheel and mirrors

XTurn the SmartKey to position1or2in the
ignition lock (Ypage 137).
XPress buttonfor the left-hand exterior
mirror or buttonfor the right-hand
exterior mirror.
The indicator lamp in the corresponding
button lights up in red.
The indicator lamp goes out again after
some time. You can adjust the selected
mirror using adjustment button"as long
as the indicator lamp is lit.
XPress adjustmentbutton"up, down, or
to the left or right until you have adjusted
the exterior mirror to the correct position.
You should have a good overview of traffic
conditions.
The convex exteriormirrors provide a larger
field of vision.
The exterior mirrors are automatically heated
after starting the vehicle if the rear window
defroster is switched on and the outside
temperature is low. Heating takes a maximum
of 10 minutes.
iYou can also heat up the exterior mirrors
manually by switching on the rear window
defroster.
Folding the exterior mirrors in or out
electrically
XTurn the SmartKey to position1or2in the
ignition lock (Ypage 137).
XBriefly press button.
Both exterior mirrors fold in or out.
iMake sure that the exterior mirrors are
always folded out fully while driving. They
could otherwise vibrate.
iIf you are driving faster than 30 mph
(47 km/h), you can no longer fold in the
exterior mirrors.
Setting the exterior mirrors
If the battery has been disconnected or
completely discharged, the exterior mirrors
must be reset.The exterior mirrors will
otherwise not fold in when you select the
"Fold in mirrors when locking" function in the
on-board computer (Ypage 209).
XTurn the SmartKey to position1in the
ignition lock (Ypage 137).
XBriefly press button.
Folding the exterior mirrors in or out
automatically
If the "Fold in mirrors when locking" function
is activated in the on-board computer
(Ypage 209):
Rthe exterior mirrors fold in automatically as
soon as you lock the vehicle from the
outside.
Rthe exterior mirrors fold out again
automatically as soon as you unlock the
vehicle and then open the driver's or front-
passenger door.
iIf the exterior mirrors have been folded in
manually, they do not fold out.
Exterior mirror pushed out of position
If an exterior mirror has been pushed out of
position, proceed as follows:
XVehicles without electrically folding
exterior mirrors:move the exterior mirror
into the correct position manually.
XVehicles with electrically folding
exterior mirrors:press and hold mirror-
folding button (Ypage 98) until you hear a
98Mirrors
Seats, steering wheel and mirrors

Rear fog lamp
The rearfog lamp improves visibility of your
vehicle for the traffic behind in the event of
thick fog. Please take note of the country-
specific regulations for the use of rear fog
lamps.
XTo switch on the rear fog lamps:turn the
SmartKey in the ignition lock to position2
or start the engine.
XTurn the light switch toor.
XPress thebutton.
The yellowindicator lamp in the
instrument cluster lights up.
XTo switch off the rear fog lamp:press the
button.
The yellowindicator lamp in the
instrument cluster goes out.
iWhen the rear fog lamp is switched on,
the center brake lamp in the tail lamp
switches off due to a legal requirement.
Parking lamps
!If the battery has been excessively
discharged, the parking lamps or standing
lamps are automatically switched off to
enable the next engine start.Always park
your vehicle safely and sufficiently lit
according to legal standards. Avoid the
continuous use of theparking lamps
for several hours. If possible, switch on the
right or theleft standing lamp.
XTo switch on:turn the light switch to
.
The greenindicator lamp in the
instrumentcluster lights up.
Standing lamps
Switching on the standinglamps ensures the
corresponding side of the vehicle is
illuminated.
XTo switch on the standing lamps:the
SmartKey is not in the ignition lock or it is
in position0.
XTurn the light switch to(left-hand side
of the vehicle) or(right-hand side of
the vehicle).
Combination switch
Turn signal
High-beam headlamps
Turn signal, right
"High-beam flasher
!Turn signal, left
XTo indicate briefly:press the combination
switch briefly to the pressure pointinthe
direction of arrowor!.
The corresponding turn signal flashes three
times.
XTo indicate:press the combination switch
beyond the pressure point in the direction
of arrowor!.
High-beam headlamps
XTo switch on the high-beam headlamps:
turn the SmartKey in the ignition lock to
position2or start the engine.
XTurn the light switch toor.
106Exterior lighting
Lights and windshield wipers

Interior lighting
Overview of interior lighting
Front overhead control panel
To switch the left-hand frontreading
lamp on/off
To switch the front interior lighting
on
"To switch the on/off
!To switch the frontinterior lighting/
automatic interiorlighting control off
To switch the right-handfront
reading lamp on/off
To switch the automatic interior lighting
control on
Rear-compartment overhead control panel
To switch the left-hand reading lamp
on/off
To switch the right-hand reading
lamp on/off
Interior lighting control
Important notes
In order to prevent the vehicle's battery from
discharging, the interior lighting functions are
automatically deactivated after some time
unless the SmartKey is in position2in the
ignitionlock.
The brightness of the ambient lighting may be
set using the on-board computer
(Ypage 207).
Automatic interior lighting control
XTo switch on:set the switch to center
position .
XTo switch off:set the switch to the
position.
The interior lighting automatically switches
on if you:
Runlock the vehicle
Ropen a door
Rremove the SmartKey from the ignition
lock.
The interior light is activated for a short while
when the SmartKey is removed from the
ignition lock. You can activate this delayed
switch-off using the on-board computer
(Ypage 208).
Manual interior lighting control
XTo switch the front interior lighting on:
set the switch to theposition.
XTo switch the interior lighting off:set the
switch to theposition or (if the door
is closed) to the center position.
XTo switch the interior lighting on/off:
press the
button.
XTo switch the reading lamps on/off:
press thebutton.
110Interior lighting
Lights and windshiel dw ipers

Dual-zone automatic climate control
XActivate the"Cooling with air
dehumidification" function.
XActivate automatic mode.
XIf the windows continue to fog up, activate
the "Windshield defrosting" function.
iYou should only select this setting until
the windshield is clear again.
Windows fogged up on the outside
XActivate the windshield wipers.
XSetthe air distribution toor.
iYou should only select this setting until
the windshield is clear again.
Rear window defroster
Activating/deactivating
The rear window defroster has a high current
draw. You should therefore switch it off as
soon as the rear window is clear. Otherwise,
the rear window defroster switches off
automatically after several minutes.
If the battery voltage is too low, the rear
window defroster may switch off.
XTurn the SmartKey to position2in the
ignition lock (Ypage 137).
XPress thebutton.
The indicator lamp in thebutton lights
up or goes out.
130Operating the climate control systems
Climate control