2016 MERCEDES-BENZ CLA key battery

Problem
Possible causes/consequences and P Solutions
You have lost a Smart-
Key. X
Have the SmartKey deactivated at a qualified specialist work-
shop. X
Report the loss immediately to the vehicle insurers. X
If necessary, have the locks changed as well.
You have lost the
mechanical key. X
Report the loss immediately to the vehicle insurers. X
If necessary, have the locks changed as well.
Doors
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 PR
Start 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.
You should preferably place luggage or loads
in the cargo compartment. Observe the load-
ing guidelines ( Y
page 272).
Unlocking and opening doors from
the inside
! The side windows will not open/close if
the battery is discharged or if the side win-
dows have iced up. It will then not be pos- sible to close the door. Do not attempt to
force the door closed. You could otherwise
damage the door or the side window.
When a door is opened, the side window on
that side opens slightly. When the door is
closed, the side window closes again.
X
To unlock and open a front door: pull
door handle D .
If the door is locked, locking knob C pops
up. The door is unlocked and opens. X
To unlock a rear door: pull up locking
knob C .
The door is unlocked and can be opened. X
To open a rear door: pull door handle D .
You can open a door from inside the vehicle
even if it has been locked. You can only open
the rear doors from inside the vehicle if they
are not secured by the child-proof locks
( Y
page 64).
If the vehicle has previously been locked with
the SmartKey from the outside, opening a
door from the inside will trigger the anti-theft Doors 83
Opening and closing Z

X
Fold the rear seat backrest forwards
( Y
page 276). X
Insert a suitable tool D , e.g. a screwdriver,
into opening C in the paneling.
The trunk lid is released. X
Open the trunk lid.
Emergency release buttonYou can open the trunk lid from inside the
vehicle with the emergency release button.
X
Press emergency release button C briefly.
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 disconnec-
ted or discharged.
Trunk lid emergency release light: R
Emergency release button C flashes for
30 minutes after the trunk lid is opened. R
Emergency release button C flashes for
60 minutes after the trunk lid is closed.
Side windows
Important safety notes
G WARNING
While opening the side windows, body parts
could become trapped between the side win- dow and the door frame as the side window
moves. There is a risk of injury.
Make sure that nobody touches the side win-
dow during the opening procedure. If some-
body becomes trapped, release the switch or
pull the switch to close the side window again.
G WARNING
While closing the side windows, body parts in
the closing area could become trapped. There
is a risk of injury.
When closing make sure that no parts of the
body are in the closing area. If somebody
becomes trapped, release the switch or press
the switch to open the side window again.
G WARNING
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
take the SmartKey with you and lock the vehi-
cle. Never leave children unsupervised in the
vehicle.
Side window reversing feature
The side windows are equipped with an auto-
matic reversing feature. If a solid object
blocks or restricts a side window from trav-
eling upwards during the automatic closing
process, the side window opens again auto-
matically. During the manual closing process,
the side window only opens again automati-
cally after the corresponding switch is
released. The automatic reversing feature is
only an aid and is no substitute for your atten-
tion when closing a side window.
G WARNING
The reversing feature does not react: R
to soft, light and thin objects, e.g. small fin-
gers R
while resetting88
Side windows
Opening and closing

Switching the seat heating on/off
Switching on/off
G WARNING
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 tempera-
tures 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 level 3 to level 2 after approximately
eight minutes.
The system automatically switches down
from level 2 to level 1 after approximately ten
minutes.
The system automatically switches off
approximately 20 minutes after it is set to
level 1 . X
Turn the SmartKey to position 1 or 2 in the
ignition lock ( Y
page 147).X
To switch on: press button C repeatedly
until the desired heating level is set. X
To switch off: press button C repeatedly
until all the indicator lamps go out.
i If the battery voltage is too low, the seat
heating may switch off. Seats 105
Seats, steering wheel and mirrors Z

Problems with the seat heating Problem
Possible causes/consequences and P Solutions
The seat heating has
switched off prema-
turely or cannot be
switched on. The on-board voltage is too low because too many electrical con-
sumers 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 a risk of an accident.
Adjust the driver's seat, head restraint, steer-
ing wheel and mirror and fasten your seat belt
before starting the engine.
G WARNING
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.
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 a risk of an
accident. Before starting off, make sure the steering
wheel is locked. Never unlock the steering
wheel while the vehicle is in motion.
C
Release lever D
Adjusts the steering wheel height

X
Turn the SmartKey to position 1 or 2 in the
ignition lock ( Y
page 147).X
Briefly press button C .
Both exterior mirrors fold in or out.
i Make sure that the exterior mirrors are
always folded out fully while driving. They
could otherwise vibrate.
i If you are driving faster than 30 mph
(47 km/ h) , you can no longer fold in the
exterior mirrors.
Setting the exterior mirrors
This function is only available in Canada.
If the battery has been disconnected or com-
pletely discharged, the exterior mirrors must
be reset. The exterior mirrors will otherwise
not fold in when you select the "Fold in mir-
rors when locking" function in the on-board
computer ( Y
page 223).X
Turn the SmartKey to position 1 in the igni-
tion lock ( Y
page 147).X
Briefly press button C .
Folding the exterior mirrors in or out
automatically
This function is only available in Canada.
If the "Fold in mirrors when locking" function
is activated in the on-board computer
( Y
page 223): R
the exterior mirrors fold in automatically as
soon as you lock the vehicle from the out-
side. R
the exterior mirrors fold out again automat-
ically as soon as you unlock the vehicle and
then open the driver's or front-passenger
door.
i If 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: X
Vehicles without electrically folding
exterior mirrors: move the exterior mirror
into the correct position manually. X
Vehicles with electrically folding exte-
rior mirrors: press and hold mirror-folding
button ( Y
page 107) until you hear a click
and then the mirrors engage in position.
The mirror housing is engaged again and
you can adjust the exterior mirrors as usual
( Y
page 107).
Automatic anti-glare mirrors
G WARNING
Electrolyte may escape if the glass in an auto-
matic anti-glare mirror breaks. The electrolyte
is harmful and causes irritation. It must not
come into contact with your skin, eyes, res-
piratory organs or clothing or be swallowed.
There is a risk of injury.
If you come into contact with the electrolyte,
observe the following: R
Rinse off the electrolyte from your skin
immediately with water. R
Immediately rinse the electrolyte out of
your eyes thoroughly with clean water. R
If the electrolyte is swallowed, immediately
rinse your mouth out thoroughly. Do not
induce vomiting.108
Mirrors
Seats, steering wheel and mirrors

Rear fog lamp
The rear fog 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. X
To switch on the rear fog lamp: turn the
SmartKey in the ignition lock to position 2
or start the engine. X
Turn the light switch to X or X .X
Press the ^ button.
The yellow ^ indicator lamp in the
instrument cluster lights up. X
To switch off the rear fog lamp: press the
^ button.
The yellow ^ indicator lamp in the
instrument cluster goes out.
i When 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 dis-
charged, 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 the ` parking lamps
for several hours. If possible, switch on the
d right or the c left standing lamp.X
To switch on: turn the light switch to ` .
The green ` indicator lamp in the instru-
ment cluster lights up.
Standing lamps
Switching on the standing lamps ensures the
corresponding side of the vehicle is illumina-
ted. X
To switch on the standing lamps: the
Sma rtKey should not be in the ignition lock
or it should be in position 0 .X
Turn the light switch to c (left-hand side
of the vehicle) or d (right-hand side of
the vehicle). Combination switch
Turn signal
C
High-beam headlamps D
Turn signal, right

Interior lighting control
General notes In order to prevent the vehicle's battery from
disc harging, the interior lighting functions are
automatical ly deactivated after some time
exce pt when the key is in position 2 in the
ign it ion lock.
The color and brig htness for the ambient
ligh ting may be set using COMAND or Aud io
20 (see the separate operating instructions).
Automatic interior lighting control X
To switch on: set the switch to center
position

Problems with the rear window defroster Problem
Possible causes/consequences and P Solutions
The rear window
defroster has deactiva-
ted prematurely or can-
not be activated. The battery has not been sufficiently charged. X
Switch off any consumers that are not required, e.g. reading
lamps, interior lighting or the seat heating.
When the battery is sufficiently charged, the rear window
defroster can be activated again.
Switching air-recirculation mode
on/off
General notes You can deactivate the flow of fresh air if
unpleasant odors are entering the vehicle
from outside. The air already inside the vehi-
cle will then be recirculated.
If you switch on air-recirculation mode, the
windows can fog up more quickly, in particu-
lar at low temperatures. Only use air-recircu-
lation mode briefly to prevent the windows
from fogging up.
The operation of air-recirculation mode is the
same for all control panels.
Switching on/off X
Turn the SmartKey to position 2 in the igni-
tion lock ( Y
page 147).X
To activate: press the