2017 MERCEDES-BENZ CLA set clock

Meanwhile, the fuel filler flap will not be locked
or unlocked.
You cannot unlock the vehicle centrally from the
inside if the vehicle has been locked with the
SmartKey or KEYLESS-GO.
You can open a door from inside the vehicle
even if it has been locked. You can open the rear
doors from inside the vehicle unless they are
secured by the child-proof lock ( Y
page 59).
If the vehicle has previously been locked with
the SmartKey from the outside, opening a door
from the inside will trigger the anti-theft alarm
system. Switch off the alarm ( Y
page 67).
If a locked door is opened from the inside, the
previous unlock status of the vehicle will be
taken into consideration if: R
the vehicle was locked using the locking but-
ton for the central locking, or R
if the vehicle was locked automatically
The vehicle will be fully unlocked if it had previ-
ously been fully unlocked. If only the driver's
door had been previously unlocked, only the
door which has been opened from the inside is
unlocked.
Automatic locking feature
X
To deactivate: press and hold button C for
approximately five seconds until a tone
sounds. X
To activate: press and hold button D for
approximately five seconds until a tone
sounds.
If you press one of the two buttons and do not
hear a tone, the relevant setting has already
been selected.
The vehicle is locked automatically when the
ignition is switched on and the wheels are turn-
ing. You could therefore lock yourself out if: R
the vehicle is being pushed. R
the vehicle is being towed. R
the vehicle is on a roller dynamometer.
You can also switch the automatic locking func-
tion on and off using the on-board computer
( Y
page 184).
Unlocking the driver's door (mechan-
ical key) If the vehicle can no longer be locked or
unlocked with the SmartKey or KEYLESS-GO,
use the mechanical key.
If you use the mechanical key to unlock and
open the driver's door, the anti-theft alarm sys-
tem will be triggered ( Y
page 67).X
Take the mechanical key out of the SmartKey
( Y
page 71). X
Insert the mechanical key into the lock of the
driver's door as far as it will go.
X
Turn the mechanical key counter-clockwise
as far as it will go to position G .
The door is unlocked. X
Turn the mechanical key back and remove it. X
Insert mechanical key into the SmartKey
( Y
page 71).
Locking the vehicle (mechanical key)
If the vehicle can no longer be locked with the
SmartKey or KEYLESS-GO, use the mechanical
key. X
Open the driver's door. X
Close the front-passenger door, the rear
doors and the trunk lid.76
Doors
Opening and closing

i You can also activate several air distribution
settings simultaneously. To do this, press
multiple air distribution buttons. The air is
then directed through various vents.
i Regardless of the air distribution setting,
airflow is always directed through the side air
vents. The side air vents can only be closed if
the adjusters are turned clockwise until they
engage.
Setting the air distribution X
Turn the SmartKey to position 2 in the ignition
lock ( Y
page 121).X
Press one or more of the

i If you activate the residual heat function at
high temperatures, only the ventilation will be
activated. The blower runs at medium speed.
i You cannot use the ventilation to cool the
vehicle interior to a temperature lower than
the outside temperature.
Activating/deactivating X
Turn the SmartKey to position 0 in the ignition
lock or remove it ( Y
page 121).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 Residual heat 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 result in burns or frostbite in
the immediate vicinity of the air vents. There
is a risk of injury.
Make sure that all vehicle occupants always
maintain a sufficient distance to the air out-
lets. If necessary, redirect 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 a side air vent: turn the adjuster in
side air vent D to the left. X
To close a side air vent: turn the adjuster in
side air vent D clockwise as far as it will go.
i The center and rear air vents are adjusted in
the same way. Air vents 119
Climate control Z

Important safety notes
G WARNIN G
If you operate information systems and com-
munication equipmen t integrate d in th e vehi-
cle while driving , you will be distracte d from
traffic conditions. You could also lose control
of th e vehicle. Ther e is a ris k of an accident.
Only operate th e equipmen t when th e traffic
situation permits. If you are no t sur e that this
is possible , park th e vehicl e payin g attention
to traffic condition s and operate th e equip-
men t when th e vehicl e is stationary.
You must observ e th e legal requirements for th e
country in whic h you are currentl y driving when
operating th e on-board computer.
G WARNIN G
If th e instrumen t cluste r has faile d or mal-
functioned, you may no t recognize function
restriction s in systems relevan t to safety. The
operating safet y of your vehicl e may be
impaired . Ther e is a ris k of an accident.
Drive on carefully. Hav e th e vehicl e checke d
at a qualified specialist workshop immedi-
ately.
The on-board computer only shows message s or
warning s from certain systems in th e multifunc-
tion display. You should therefor e mak e sur e
your vehicl e is operating safely at all times .
If th e operating safet y of your vehicl e is
impaired , pull ove r as soo n as it is saf e to do so.
Contac t a qualified specialist workshop.
Fo r an overview, see th e instrumen t panel illus-
tration ( Y
page 32).
Displays and operation
Instrument cluster lighting
The ligh t sensor in th e instrumen t cluste r auto -
matically control s th e brightness of th e multi-
function display. In daylight, th e displays in th e
instrumen t cluste r are no t illuminated.
The lighting in th e instrumen t cluster, in th e dis-
plays and th e control s in th e vehicl e interior can
be adjusted usin g th e brightness control knob. The brightness control knob is locate d on th e
botto m lef t of th e instrumen t cluste r
( Y
page 32). X
Turn th e brightness control knob clockwise or
counter-clockwise.
If th e ligh t switch is set to th e X , ` or
X position , th e brightness is dependen t
upon th e brightness of th e ambien t light.
Speedometer with segments The speedometer is divided int o segments on
vehicles wit h Distanc e Pilot DISTRONIC.
The segments in th e speedometer indicat e
whic h spee d range is available. R
Distanc e Pilot DISTRONI C is activated
( Y
page 150):
On e or two segments in th e set spee d range
ligh t up. R
Distanc e Pilot DISTRONI C detects a vehicl e in
fron t moving mor e slowly than th e store d
speed:
The segments between th e spee d of th e vehi-
cle in fron t and th e store d spee d ligh t up.
Tachometer
! Do no t driv e in th e overrevving range, as this
could damag e th e engine.
The red ban d in th e tachometer indicates th e
engine's overrevving range.
The engin e is limite d within a range to protect
th e engin e when th e red ban d is reached.
Outside temperature display You should pay special attention to road condi-
tion s when temperatures are aroun d freezing
point.
Bea r in min d that th e outside temperature dis-
play indicates th e temperature measured and
does no t record th e road temperature.
The outside temperature display is in th e multi-
function display ( Y
page 176).
Ther e is a short delay before a chang e in outside
temperature appear s in th e multifunction dis-
play.174
Displays and operation
On-board computer and displays

Remove th e SmartKey if you park th e vehicl e
and do no t require any electrical consumers.
The vehicl e will then use ver y littl e energy, thus
conserving battery power .
If th e power suppl y has been interrupted, e.g. if
you reconnect th e battery, you will hav e to :R
set th e clock usin g th e multimedia system;
see th e separat e operating instructions.R
reset th e function for foldin g th e exterio r mir -
ror s in/out automatically, by foldin g th e mir -
ror s out once ( Y
page 96 )
Charging the battery
G WARNIN G
During charging and jump-starting , explosive
gase s can escape from th e battery. There is a
ris k of an explosion .
Particularly avoi d fire, open flames, creating
sparks and smoking. Ensur e there is sufficien t
ventilation while charging and jump-starting .
Do no t lean ove r a battery.
G WARNIN G
Battery acid is caustic. There is a ris k of injury.
Avoid contact wit h skin, eyes or clothing . Do
no t inhale any battery gases. Do no t lean ove r
th e battery. Kee p children away from batter-
ies. Wash away battery acid immediately wit h
plenty of clean water and seek medical atten -
tion .
G WARNIN G
A discharged battery can freez e at tempera-
tures belo w freezing point. When jump-start - ing th e vehicl e or charging th e battery, gase s
can escape from th e battery. There is a ris k of
an explosion .
Allow th e frozen battery to thaw out before
charging it or jump-starting .
! Only use battery chargers wit h a maximum
charging voltag e of 14.8 V.
! Only charge th e battery usin g th e jump-
starting connection point.
The jump-starting connection poin t is in th e
engin e compartmen t ( Y
page 273).X
Open th e hood. X
Connect th e battery charge r to th e positive
termina l and ground poin t in th e sam e order
as when connecting th e donor battery in th e
jump-starting procedure ( Y
page 273).
If th e indicator/warning lamp s do no t ligh t up in
th e instrumen t cluste r at low temperatures , it is
ver y likely that th e discharged battery has fro-
zen. In this cas e you may neither jump-start th e
vehicl e no r charge th e battery. The servic e life of
a thawed-out battery may be shorter. The start -
ing characteristics can be impaired, particularly
at low temperatures . Hav e th e thawed-out bat -
tery checke d at a qualified specialist workshop.
Only charge th e installed battery wit h a battery
charge r whic h has been tested and approve d by
Merced es-Benz .
A battery charge r uni t specially
adapted for Mercedes-Benz vehicles and tested
and approve d by Mercedes-Benz is available as
an accessory. It permit s th e charging of th e bat -
tery in it s installed position . Contac t an author-
ized Mercedes-Benz Cente r for further informa-
tion and availability. Read th e battery charger's
operating instruction s before charging th e bat -
tery.
Jump-starting
Fo r th e jump-starting procedure , use only th e jump-starting connection point, consisting of a pos -
itive termina l and a ground point, in th e engin e compartment.
G WARNIN G
Battery acid is caustic. There is a ris k of injury.
Avoid contact wit h skin, eyes or clothing . Do no t inhale any battery gases. Do no t lean ove r th e
battery. Kee p children away from batteries. Wash away battery acid immediately wit h plenty of
clean water and seek medical attention . Jump-starting 273
Breakdown assistance Z