2016 MERCEDES-BENZ CLA-Class ignition

The pulsating brake pedal can be an indica-
tion of hazardous road conditions, and func-
tions as a reminder to take extra care while
driving.
BAS (Brake Assist System)
General information
BAS operates in emergency braking situa-
tions. If you depress the brake pedal quickly,
BAS automatically boosts the braking force,
thus shortening the stopping distance.
Important safety notes
iObserve the "Important safety notes" sec-
tion (
Ypage 65).
GWARNING
If BAS is malfunctioning, the braking distance
in an emergency braking situation is
increased. There is a risk of an accident.
In an emergency braking situation, depress
the brake pedal with full force. ABS prevents
the wheels from locking.
Braking
XKeep the brake pedal firmly depressed until
the emergency braking situation is over.
ABS prevents the wheels from locking.
The brakes will function as usual once you
release the brake pedal. BAS is deactivated.
COLLISION PREVENTION ASSIST
PLUS
General information
iObserve the "Important safety notes" sec-
tion (
Ypage 65).
COLLISION PREVENTION ASSIST PLUS con-
sists of a distance warning function with an
autonomous braking function and adaptive
Brake Assist. COLLISION PREVENTION ASSIST PLUS can
help you to minimize the risk of a front-end
collision with a vehicle ahead or reduce the
effects of such a collision.
If COLLISION PREVENTION ASSIST PLUS
detects that there is a risk of a collision, you
will be warned visually and acoustically. If you
do not react to the visual and audible collision
warning, autonomous braking can be initiated
in critical situations. If you apply the brake
yourself in a critical situation, the COLLISION
PREVENTION ASSIST PLUS adaptive Brake
Assist assists you.
Important safety notes
Detection of hazardous situations can be par-
ticularly impaired by:
Rthere is dirt on the sensors or anything else
covering the sensors
Rthere is snow or heavy rain
Rthere is interference by other radar sources
Rthere are strong radar reflections, for
example in parking garages
Ra narrow vehicle traveling in front, e.g. a
motorbike
Ra vehicle traveling in front on a different line
Rnew vehicles or after a service on the COL-
LISION PREVENTION ASSIST PLUS system
Observe the important safety notes in the
"Breaking-in notes" section (
Ypage 146).
Following damage to the front end of the vehi-
cle, have the configuration and operation of
the radar sensor checked at a qualified spe-
cialist workshop. This also applies to colli-
sions at low speeds where there is no visible
damage to the front of the vehicle.
Switching on/off
The COLLISION PREVENTION ASSIST PLUS is
automatically active after switching on the
ignition.
You can activate or deactivate COLLISION
PREVENTION ASSIST PLUS in the on-board
computer (
Ypage 220). When deactivated,
66Driving safety systems
Safety

No steering assistance is provided from
STEER CONTROL, if:
RESP®is malfunctioning.
Rthe lighting is faulty.
If ESP
®is malfunctioning, you will be assisted
further by the electrical power steering.
Protection against theft
Immobilizer
The immobilizer prevents your vehicle from
being started without the correct SmartKey.
XTo activate with the SmartKey: remove
the SmartKey from the ignition lock.
XTo activate with KEYLESS-GO start-
function or KEYLESS-GO: switch the igni-
tion off and open the driver's door.
XTo deactivate: switch on the ignition.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. Any-
one can start the engine if a valid SmartKey
has been left inside the vehicle.
iThe immobilizer is always deactivated
when you start the engine.
In the event that the engine cannot be star-
ted (yet the vehicle's battery is charged),
the system is not operational. Contact an
authorized Mercedes-Benz Center or call
1-800-FOR-MERCedes (in the USA) or
1-800-387-0100 (in Canada).
ATA (anti-theft alarm system)
XTo arm: lock the vehicle with the SmartKey
or KEYLESS-GO.
Indicator lamp :flashes. The alarm sys-
tem is armed after approximately
15 seconds.
XTo disarm: unlock the vehicle with the
SmartKey or KEYLESS-GO.
or
XInsert the SmartKey into the ignition lock.
A visual and audible alarm is triggered if the
alarm system is armed and you open:
Ra door
Rthe vehicle with the mechanical key
Rthe trunk lid
Rthe hood
XTo turn the alarm off with the SmartKey:
press the %or& button on the
SmartKey.
The alarm is switched off.
or
XVehicles with KEYLESS-GO start-func-
tion or KEYLESS-GO: remove the Start/
Stop button from the ignition lock
(
Ypage 147).
XInsert the SmartKey into the ignition lock.
The alarm is switched off.
XTo stop the alarm using KEYLESS-GO:
grasp the outside door handle. The Smart-
Key must be outside the vehicle.
The alarm is switched off.
or
XPress the Start/Stop button on the dash-
board. The SmartKey must be inside the
vehicle.
The alarm is switched off.
The alarm is not switched off, even if you
close the open door that triggered it, for
example.
iIf the alarm continues for more than
30 seconds, the mbrace emergency call
system automatically notifies the Cus-
tomer Assistance Center. This is done
either by text message or data connection.
Protection against theft73
Safety
Z

Useful information
i
This Operator's Manual describes all
models and all standard and optional equip-
ment 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 special-
ist workshops (
Ypage 25).
SmartKey
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 position P
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 you attach heavy or large objects to the
SmartKey, the SmartKey could be uninten-
tionally turned in the ignition lock. This could
cause the engine to be switched off. There is a risk of an accident.
Do not attach any heavy or large objects to theSmartKey. Remove any bulky key rings before
inserting the SmartKey into the ignition lock.
!Keep the SmartKey away from strong
magnetic fields. Otherwise, the remote
control function could be affected.
Strong magnetic fields can occur in the
vicinity of powerful electrical installations.
Do not keep the SmartKey:
Rwith electronic devices, e.g. a mobile
phone or another SmartKey.
Rwith metallic objects, e.g. coins or metal
foil.
Rinside metallic objects, e.g. a metal case.
Vehicles with KEYLESS-GO start function:
do not keep the SmartKey in the cargo com-
partment. Otherwise, the SmartKey may not
be detected, e.g. when starting the engine
using the Start/Stop button.
SmartKey functions
:& To lock the vehicle
;FTo open the trunk lid
=%To unlock the vehicle
If you do not open the vehicle within approx-
imately 40 seconds of unlocking:
Rthe vehicle is locked again.
Ranti-theft protection is reactivated.
XTo lock: press the &button.
76SmartKey
Opening and closing

Deactivating andactivating
If you do no tintend to use th evehicle fo r a
longer period of time, you can deactivat eKEY-
LESS-GO .The SmartKey will then use ver ylit -
tl e power, thereby conservin gbattery power.
Fo rth epurposes of activation/deactivation ,
th evehicle mus tno tbe nearby.
XTo deactivate :press th e& buttonon
th eSmartKey twic ein rapid succession .
The battery chec klamp of th eSmartKey
flashes twic ebriefly and lights up once ,
then KEYLESS-GO is deactivated
(
Ypage 79) .
XTo activate :press any butto non th e
SmartKey.
or
XInser tth eSmartKey into th eignition lock.
KEYLESS-GO and all of it sassociated fea-
tures are available again .
KEYLESS-GOstar tfunction
General notes
Bear in min dthat th eengin ecan be started by
any of th evehicle occupant sif there is a
SmartKey in th evehicle.
Changin gth esettings of th elocking
syste m
You can chang eth esetting sof th elocking
system. Thi smeans that only th edriver's doo r
and th efue lfiller flap are unlocke dwhen th e
vehicle is unlocked. Thi sis useful if you fre-
quentl ytrave lon your own .
XTo change th esetting: press and hol dth e
% and& buttons simultaneousl yfo r approximately six seconds until th
ebattery
indicator lamp flashes twic e (
Ypage 79).
If th esetting of th elocking system is changed
within th esignal range of th evehicle, press-
in g th e& or% button:
Rlocks or
Runlocks th evehicle
The SmartKey no wfunction sas follows :
XTo unlock :press th e% buttononce .
XTo unlock centrally :press th e% but-
to ntwice.
XTo lock centrally :press th e& button.
The KEYLESS-GO function is changed as fol-
lows :
XTo unlock th edriver's door: touch the
inne rsurfac eof th edoo rhandle on th e
driver's door.
XTo unlock centrally :touch th einne rsur -
fac eof th edoo rhandle on th efront-
passenger doo ror th erea rdoor.
XTo lock centrally :touch th eouter sensor
surfac eon on eof th edoo rhandles .
XTo restor eth efactory settings: press
and hol dth e% and& buttons simul-
taneousl yfo rapproximately six seconds
until th ebattery chec klamp flashes twic e
(
Ypage 79).
Mechanica lkey
General notes
If th evehicle can no longer be locke dor
unlocke dwit hth eSmartKey or KEYLESS-GO ,
use th emechanical key.
If you use th emechanical ke yto unloc kand
ope nth edriver's doo ror th etrunk lid, th e
anti-thef talar msystem will be triggere d
(
Ypage 73).
There are severa lways to turn of fth ealarm:
XTo deactivate th ealarm wit hth ekey :
press th e% or& buttonon th ekey.
or
78SmartKey
Opening and closing

XInsert the SmartKey into the ignition lock.
or
XTo deactivate the alarm with KEYLESS-
GO: press the Start/Stop button in the igni-
tion lock. The SmartKey must be in the
vehicle.
or
XLock or unlock the vehicle using KEYLESS-
GO. The SmartKey must be outside the
vehicle.
If you unlock the vehicle using the mechanical
key, the fuel filler flap will not be unlocked
automatically.
XTo unlock the fuel filler flap: insert the
SmartKey into the ignition lock.
Removing the mechanical key
XPush release catch :in the direction of
the arrow and at the same time remove
mechanical key ;from the SmartKey.
For further information about:
Runlocking the driver's door (Ypage 85)
Runlocking the trunk (Ypage 87)
Rlocking the vehicle (Ypage 85)
Inserting the mechanical key
XPush mechanical key ;completely into
the SmartKey until it engages and release
catch :is back in its basic position.
SmartKey battery
Important safety notes
GWARNING
Batteries contain toxic and corrosive substan- ces. If batteries are swallowed, it can result in
severe health problems. There is a risk of fatalinjury.
Keep batteries out of the reach of children. If
a battery is swallowed, seek medical attention immediately.
The SmartKey batteries contain perchlorate
material, which may require special handling
and regard for the environment. National
guidelines must be observed during disposal.
In California, see www.dtsc.ca.gov/
HazardousWaste/Perchlorate/
index.cfm.
Mercedes-Benz recommends that you have
the battery replaced at a qualified specialist
workshop.
Checking the battery
XPress the &or% button.
The battery is working properly if battery
check lamp :lights up briefly.
The battery is discharged if battery check
lamp :does not light up briefly.
XChange the battery (Ypage 80).
SmartKey79
Opening and closing
Z

ProblemPossible causes/consequences andMSolutions
KEYLESS-GO is malfunctioning.
XLock/unlock the vehicle using the remote control function of
the SmartKey.
XHave the vehicle and SmartKey checked at a qualified specialist
workshop.
If the vehicle can also not be locked/unlocked using the remote
control function:
XUnlock (Ypage 85) or lock (Ypage 85) the vehicle using the
mechanical key.
XHave the vehicle and SmartKey checked at a qualified specialist
workshop.
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 317).
or
XJump-start the vehicle (Ypage 319).
or
XConsult a qualified specialist workshop.
The engine cannot be
started using the Start/
Stop button. The
SmartKey is in the vehi-
cle.The vehicle is locked.
XUnlock the vehicle and try to start the vehicle again.
The SmartKey battery is discharged or nearly discharged.
XCheck the SmartKey battery (Ypage 79) and replace it if nec-
essary (
Ypage 80).
If this does not work:
XStart your vehicle with the SmartKey in the ignition lock.
There is interference from a powerful source of radio waves.
XStart your vehicle with the SmartKey in the ignition lock.
82SmartKey
Opening and closing

alarm system. Switch off the alarm
(
Ypage 73).
Centrally locking and unlocking the
vehicle from the inside
You can centrally lock or unlock the vehicle
from the inside. This can be useful if you wish
to lock the vehicle before pulling away, for
example.
XTo unlock:press button :.
XTo lock:press button ;.
If all the doors and the trunk lid are closed,
the vehicle locks.
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
(
Ypage 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
alarm system. Switch off the alarm
(
Ypage 73). If a locked door is opened from the inside, the
previous unlock status of the vehicle will be
taken into consideration if:
Rthe vehicle was locked using the locking
button for the central locking, or
Rif the vehicle was locked automatically
The vehicle will be fully unlocked if it had pre-
viously 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
XTo deactivate: press and hold button :
for approximately five seconds until a tone sounds.
XTo activate: press and hold button ;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
turning.
You could therefore lock yourself out if:
Rthe vehicle is being pushed.
Rthe vehicle is being towed.
Rthe vehicle is on a roller dynamometer.
You can also switch the automatic locking
function on and off using the on-board com-
puter (
Ypage 222).
84Doors
Opening and closing

This means that the reversing feature cannot
prevent someone being trapped in these sit-
uations. There is a risk of injury.
Make sure that no body parts are in close
proximity during the closing procedure. If
someone becomes trapped, press the switch
to open the side window again.
Opens and closes the side windows
The switches for all side windows are located
on the driver's door. There is also a switch on
each door for the corresponding side window.
The switches on the driver's door take prec-
edence.
:Front left
;Front right
=Rear right
?Rear left
XTurn the SmartKey to position 1or 2in the
ignition lock (
Ypage 147).
XTo open manually: press and hold the cor-
responding switch.
XTo open fully: press the switch beyond the
point of resistance and release it.
Automatic operation is started.
XTo close manually: pull the corresponding
switch and hold it.
XTo close fully: pull the switch beyond the
point of resistance and release it.
Automatic operation is started.
XTo interrupt automatic operation:
press/pull the corresponding switch again.
iIf you press/pull the switch beyond the
point of resistance, automatic operation is
started in the corresponding direction. You
can stop automatic operation by pressing/
pulling the switch again.
iYou can continue to operate the side win-
dows after you switch off the engine or
remove the SmartKey. This function
remains active for five minutes or until the
driver's or front-passenger door is opened.
iWhen the override feature for the side
windows is activated (
Ypage 64), the side
windows cannot be operated from the rear.
Convenience opening
Vehicles with KEYLESS-GO, the KEYLESS-
GO start function, Exclusive Package or
AMG Exclusive Package: you can ventilate
the vehicle before you start driving.
The SmartKey can also be used to carry out
the following functions simultaneously:
Runlock the vehicle
Ropen the side windows
Ropen the panorama roof with power tilt/
sliding panel and the roller sunblind
The convenience opening feature can only be
operated using the SmartKey.
The "convenience opening" feature is also
available when the vehicle is unlocked.
XVehicles with Exclusive Package or
AMG Exclusive Package but without
KEYLESS-GO and the KEYLESS-GO start
function: for the following operations,
point the tip of the SmartKey at the door
handle on the driver's door. The SmartKey
must be close to the driver's door handle.
iVehicles with KEYLESS-GO or the KEY-
LESS-GO start function: the SmartKey
must be in close proximity to the vehicle.
Side windows89
Opening and closing
Z