2018 MERCEDES-BENZ CLA Owners Manual

The distance warning function may not give
warnings in all critical situations. There is a
risk of an accident.
Always pay careful attention to the traffic sit-
uation and be ready to brake.
Always adapt your speed to suit the prevailing
road and traffic conditions.
G WARNING
The distance warning function cannot always
clearly identify object sa nd complex traffic
situations.
In such cases, the distance warning function
may: R
give an unnecessary warning R
not give aw arning
There is ar isk of an accident.
Always pay careful attention to the traffic sit-
uation and do not rely solely on the distance
warning function.
Function Starting at as peed of approximately 4m ph
(7 km/h), the distance warning function warns
you if you rapidly approach av ehicle in front .A n
intermittent warning ton ew ill then sound, and
the

sensor technology to assess the traffic situa-
tion.
Situation-dependent braking assistance is capa-
ble of reacting to moving objects that have
alread yb een detected as such at least once
over the period of observation, up to vehicle
speeds of around 155 mph (250 km/h).
Situation-dependent braking assistance can
also detect stationary objects, up to vehicle
speeds of around 44 mph (70 km/h). X
Keep the brake pedal depressed until the
emergency braking situation is over.
ABS prevents the wheels from locking.
The brakes will work normally agai ni f:R
you release the brake pedal. R
there is no longer any danger of ac ollision.R
no obstacle is detected in front of your vehi-
cle.
Situation-dependent braking assistance is then
deactivated.
Important safety notes
i Observe the "Important safety notes" sec-
tion for driving safety systems ( Y
page 61).
G WARNING
Adaptive Brake Assist does not react: R
to people or animals R
to oncoming vehicles R
to crossing traffic R
when cornering
As ar esult, Adaptive Brake Assist may not
intervene in all critical conditions. There is a
risk of an accident.
Always pay careful attention to the traffic sit-
uation and be ready to brake.
G WARNING
Adaptive Brake Assist cannot always clearly
identify objects and complex traffic situa-
tions.
In such cases, Adaptive Brake Assist might: R
intervene unnecessarily R
not intervene
There is ar isk of an accident. Always pay careful attention to the traffic sit-
uation and be ready to brake. Terminate the
intervention in an on-critical driving situation.
Due to the nature of the system, complex but
non-critical driving conditions may also cause
Active Brake Assist to intervene.
Even if Active Brake Assist is not available due to
am alfunction in the radar sensor system, the
brake system is still available with full brake
boosting effect and BAS.
ESP ®
(Electronic Stability Program)
General notes
i Observe the "Important safety notes" sec-
tion ( Y
page 61).
ESP ®
monitors driving stability and traction ,i .e.
power transmission between the tires and the
road surface.
If ESP ®
detects that the vehicle is deviating from
the direction desired by the driver, one or more
wheels are braked to stabilize the vehicle. The
engine output is also modified to keep the vehi-
cle on the desired course within physical limits.
ESP ®
assists the driver when pulling awa yo n
wet or slippery roads. ESP ®
can also stabilize
the vehicle during braking.
ETS/4ETS (Electronic Traction System)
i Observe the "Important safety notes" sec-
tion ( Y
page 61).
ETS traction control is part of ESP ®
.Onv ehicles
with 4MATIC, 4ETS is part of ESP ®
.
Traction control brakes the drive wheels indi-
vidually if they spin. This enables you to pull
awa ya nd accelerate on slippery surfaces, for
example if the road surface is slippery on one
side. In addition, more drive torque is transfer-
red to the wheel or wheels with traction.
Traction control remains active, even if you
deactivate ESP ®
.
Important safety notes
i Observe the "Important safety notes" sec-
tion ( Y
page 61).64
Driving safety systems
Safety

G WARNING
If ESP ®
is malfunctioning, ESP ®
is unable to
stabilize the vehicle. Additionally, further driv-
ing safety systems are deactivated. This
increases the risk of skidding and an accident.
Drive on carefully .H ave ESP ®
checked at a
qualified specialist workshop.
Vehicles without 4MATIC: when towing your
vehicl ew ith the front axle raised, it is important
that you observe the notes on ESP ®
( Y
pag e2 82).
If the

Characteristics when ESP ®
is deactivatedIf ESP ®
is deactivate da nd on eorm or ew heels
start to spin ,t he

X
To deactivate ESP ®
: press button C until
the

You should therefore adapt your drivin gs tyle
to the differen th andlin gc haracteristics. Have
the brak es yste mc hecked at aq ualified spe-
cialist workshop.
Please observ et he information on warnin ga nd
indicator lamps ( Y
page 220)
( Y
page 220) as well as on display messages
( Y
page 194).
ADAPTIVE BRAKE ADAPTIVE BRAKE enhances braking safet ya nd
offers increased braking comfort .Ina ddition to
the braking function ,A DA PTIVE BRAKE also has
the HOL Df unction ( Y
page 157) and hill start
assist ( Y
page 125).
STEER CONTROL
Genera li nformationSTEER CONTROL helps you by transmitting a
noticeable steerin gf orc etot he steerin gw heel
in the direction required for vehicle stabilization.
This steerin ga ssistanc eisp rovided in particular
if: R
both right wheels or both left wheels are on a
wet or slippery road surfac ew hen you brakeR
the vehicle begins to skid
Important safet yn otes
i Observe the "Importan ts afet yn otes" sec-
tion ( Y
page 61).
No steerin ga ssistanc eisp rovided from STEER
CONTROL, if: R
ESP ®
is malfunctioningR
the steerin gism alfunctioning
If ESP ®
is malfunctioning, you will be assisted
further by the electrical power steering.
Protection against theft
Immobilizer
The immobilizer prevent sy our vehicle from
being started without the correc tS martKey. X
To activat ew ith th eS martKey: remove the
SmartKey from the ignition lock. X
To activat ew ith KEYLESS-GO start-func-
tion or KEYLESS-GO: switc ht he ignition off
and open the driver's door. X
To deactivate: switc hont he ignition.
When leaving the vehicle, always tak et he
SmartKey with you and lock the vehicle. Anyone
can star tt he engin eifav alid SmartKey has been
left inside the vehicle.
i The immobilizer is always deactivate dw hen
you star tt he engine.
In the even tt hat the engin ec annot be started
(yet the vehicle's battery is charged), the sys-
tem is not operational. Contact an authorized
Mercedes-Ben zC enter or call
1-800-FOR-MERCedes (in the USA )o r
1-800-387-010 0( in Canada).
ATA (anti-theft alar ms ystem)
X
To arm: lock the vehicle with the SmartKe yo r
KEYLESS-GO.
Indicator lamp C flashes. The alarm system
is armed after approximately 15 seconds. X
To disarm: unlock the vehicle with the Smart-
Key or KEYLESS-GO.
or X
Insert the SmartKe yi nt ot he ignition lock.
Av isual and audible alarm is triggered if the
alarm system is armed and you open: R
ad oor R
the vehicle with the mechanical key R
the trun kl id R
the hood68
Protection against theft
Safety

X
To turn the alarm off with the SmartKey:
press the 6 or 7 button on the Smart-
Key.
The alarm is stopped.
or X
Vehicles with KEYLESS-GO start-function
or KEYLESS-GO: remove the Start/Stop but-
ton from the ignition lock ( Y
page 122).X
Insert the SmartKey into the ignition lock.
The alarm is stopped. X
To sto pt he alarm using KEYLESS-GO:
grasp the outsid ed oo rh an dle. The SmartKey
must be outsid et he vehicle.
The alarm is stopped.
or X
Press the Start/Stop button on the dash-
board .T he SmartKey must be insid et he vehi-
cle.
The alarm is stopped.
The alarm is not switched off, eve nify ou close
the open door tha tt riggered it, for example.
i If the alarm continue sf or more than
30 seconds ,t he mbrace emergency cal ls ys -
tem automaticall yn otifie st he Customer
Assistance Center. Thi sisd on ee it her by text
message or data connection.
The emergency cal ls ys tem send st he mes-
sage or data provided that: R
yo uh av es ub scribed to the mbrace service.R
the mbrace service ha sb ee na ctivated
properly. R
the necessary mobil ep hone network is
available. Protectio na gains tt heft 69
Safety Z

SmartKey
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 ar isk 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.
G WARNING
If you attach heavy or large object stot he
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 object stot he
SmartKey. Remove any bulky key rings before
insertin gt he SmartKey into the ignition lock.
! Keep the SmartKey away from stron gm ag-
netic fields. Otherwise, the remote control
function could be affected.
Strong magnetic fields can occur in the vicin-
ity of powerful electrical installations.
Do not keep the SmartKey: R
with electronic devices, e.g. am obile phone
or another SmartKey. R
with metallic objects, e.g. coins or metal foil. R
inside metallic objects, e.g. am etal case
Vehicles with KEYLESS-GO star tf unction: do
not keep the SmartKey in the trunk .O therwise, the SmartKey may not be detected, e.g. when
startin gt he engine using the Start/Stop button.
SmartKey functions
C
7 To lock the vehicleD
T To open the trunk lid