2017 MERCEDES-BENZ CLA-Class ECU

GWARNING
If the child restraint system is subjected to
direct sunlight, parts may get very hot. Chil-
dren may burn themselves on these parts,
particularly on the metal parts of the child
restraint system. There is a risk of injury.
If you leave the vehicle, taking the child with
you, always ensure that the child restraint
system is not exposed to direct sunlight. Pro- tect it with a blanket, for example. If the child
restraint system has been exposed to direct
sunlight, let it cool down before securing the
child in it. Never leave children unattended in
the vehicle.
Child-proof locks for the rear doors
You secure each door individually with the child-
proof locks on the rear doors. A door secured
with a child-proof lock cannot be opened from
inside the vehicle. When the vehicle is unlocked,the door can be opened from the outside.
XTo activate: press the child-proof lock lever
up in the direction of arrow :.
XMake sure that the child-proof locks are work-
ing properly.
XTo deactivate: press the child-proof lock
lever down in the direction of arrow ;.
Override feature for the rear side win-
dows
XTo activate/deactivate:press button:.
If indicator lamp ;is lit, operation of the rear
side windows is disabled. Operation is only
possible using the switches in the driver's
door. If indicator lamp ;is off, operation is
possible using the switches in the rear com-
partment.
Pets in the vehicle
GWARNING
If you leave animals unattended or unsecured
in the vehicle, they could press buttons or
switches, for example.
As a result, they could:
Ractivate vehicle equipment and become
trapped, for example
Ractivate or deactivate systems, thereby
endangering other road users
Unsecured animals could also be flung around
the vehicle in the event of an accident or sud-
den steering or braking, thereby injuring vehi-
cle occupants. There is a risk of an accident
and injury.
Never leave animals unattended in the vehi-
cle. Always secure animals properly during
the journey, e.g. use a suitable animal trans-
port box.
Pets in the vehicle59
Safety
Z

Doors
Important safet ynotes
GWARNING
If children are lef tunsupervised in th evehicle,
they could:
Rope nth edoors ,thus endangerin gother
people or road users.
Rget out and disrup ttraffic .
Roperat eth evehicle' sequipment.
Additionally, children could set th evehicle in
motion if, fo rexample, they:
Rrelease th eparking brake .
Rshiftingth eautomatic transmissio nout of
par kposition P
RStart theengine.
There is aris kof an acciden tand injury.
Whe nleavin gth evehicle, always take th e
SmartKey wit hyou and loc kth evehicle. Never
leav echildren or animals unattended in th e
vehicle. Always keep th eSmartKey out of
reach of children .
You should preferably plac eluggage or load sin
th ecargo compartment. Observ eth eloadin g
guidelines (
Ypage 233).
Unlockingan dopening doors from
th einside
!
The sid ewindows will no topen/close if th e
battery is discharged or if th esid ewindows
hav eiced up. It will then no tbe possible to
close th edoor. Do no tattempt to forc eth e
doo rclosed. You could otherwise damage th e
doo ror th esid ewindow.
Whe n adoo ris opened, th esid ewindow on that
sid eopens slightly. Whe nth edoo ris closed, th e
sid ewindow close sagain .
XTo unlock an dope n afront door: pull door
handle ;.
If th edoo ris locked, locking knob :pop sup.
The doo ris unlocke dand opens .
XTo unlock arear door: pull up locking
knob :.
The doo ris unlocke dand can be opened.
XTo ope n arear door: pull doorhandle ;.
You can ope n adoo rfrom insid eth evehicle
eve nif it has bee nlocked. You can only ope nth e
rea rdoors from insid eth evehicle if they are no t
secure dby th echild-proof locks (
Ypage 59).
If th evehicle has previously bee nlocke dwit h
th eSmartKey from th eoutside, opening adoo r
from th einsid ewill trigger th eanti-thef talar m
system. Switc hof fth ealar m (
Ypage 67).
Centrally locking an dunlocking th e
vehicle from th einside
You can centrall yloc kor unloc kth evehicle from
th einside. Thi scan be useful if you wish to loc k
th evehicle befor epulling away, fo rexample.
XTo unlock :press butto n:.
XTo lock :press butto n;.
If all th edoors and th etrunk lid are closed, th e
vehicle locks .
Doors75
Opening and closing
Z

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 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 (
Ypage 67).
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 but-
ton for the central locking, or
Rif 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
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 turn-
ing. 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 func-
tion on and off using the on-board computer
(
Ypage 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 (
Ypage 67).
XTake the mechanical key out of the SmartKey (Ypage 71).
XInsert the mechanical key into the lock of thedriver's door as far as it will go.
XTurn the mechanical key counter-clockwise
as far as it will go to position 1.
The door is unlocked.
XTurn the mechanical key back and remove it.
XInsert mechanical key into the SmartKey
(Ypage 71).
Locking the vehicle (mechanical key)
If the vehicle can no longer be locked with the
SmartKey or KEYLESS-GO, use the mechanical
key.
XOpen the driver's door.
XClose the front-passenger door, the rear
doors and the trunk lid.
76Doors
Opening and closing

XPress the locking button on the driver’s door
(Ypage 75).
XCheck whether the locking knobs on the
front-passenger door and the rear doors are
still visible. Press down the locking knobs by
hand, if necessary.
XClose the driver's door.
XTake the mechanical key out of the SmartKey
(Ypage 71).
XInsert the mechanical key into the lock of the
driver's door as far as it will go.
XTurn the mechanical key clockwise as far as it
will go to position1.
XTurn the mechanical key back and remove it.
XMake sure that the doors and the trunk lid are
locked.
XInsert mechanical key into the SmartKey
(Ypage 71).
iIf you lock the vehicle as described above,
the fuel filler flap is not locked. The anti-theft
alarm system is not armed.
Trunk
Important safety notes
GWARNING
Combustion engines emit poisonous exhaust
gases such as carbon monoxide. Exhaust
gases can enter the vehicle interior if the
trunk lid is open when the engine is running,
especially if the vehicle is in motion. There is a
risk of poisoning.
Always switch off the engine before opening
the trunk lid. Never drive with the trunk lid
open.
GWARNING
If objects, luggage or loads are not secured or
not secured sufficiently, they could slip, tip
over or be flung around and thereby hit vehicle
occupants. There is a risk of injury, particu-
larly in the event of sudden braking or a sud-
den change in direction.
Always store objects so that they cannot be
flung around. Secure objects, luggage or
loads against slipping or tipping before the
journey.
!The trunk lid swings upwards when opened.
Therefore, make sure that there is sufficient
clearance above the trunk lid.
The opening dimensions of the trunk lid can be
found in the "Vehicle data" section
(
Ypage 314).
You should preferably place luggage or loads in
the trunk. Observe the loading guidelines
(
Ypage 233).
Do not leave the SmartKey in the trunk. You
could otherwise lock yourself out.
The trunk lid can be:
Ropened and closed manually from outside
Ropened automatically from outside
Ropened automatically from inside
Rreleased with the emergency release from the
inside
Opening/closing from outside
Opening
XPress the %button on the SmartKey.
XPull handle :.
XRaise the trunk lid.
Trunk77
Opening and closing
Z

Notes on breaking-in a new vehicle
Important safety notes
The sensor system of some driving and driving
safety systems adjusts automatically while a
certain distance is being driven after the vehiclehas been delivered or after repairs. Full system
effectiveness is not reached until the end of this
teach-in procedure.
New and replaced brake pads and discs only
reach their optimum braking effect after several hundred kilometers of driving. Compensate for
this by applying greater force to the brake pedal.
The first 1000 miles (1500 km)
The more you look after the engine when it is
new, the more satisfied you will be with its per-
formance in the future.
RYou should therefore drive at varying vehicle
and engine speeds for the first 1000 miles
(1500 km).
RAvoid heavy loads, e.g. driving at full throttle,during this period.
RChange gear in good time, before the tach-
ometer needle is Ôof the way to the red area
of the tachometer.
RDo not manually shift to a lower gear to brake
the vehicle.
RTry to avoid depressing the accelerator pedal
beyond the point of resistance (kickdown).
RIdeally, for the first 1000 miles (1500 km),
driv ein progra mE.
Addition al breaking-in notes for Mercedes-AMG
vehicles:
RDo not drive faster than 85 mph (140 km/h)
for the first 1,000 miles (1,500 km).
ROnly allow the engine to reach a maximum
engine speed of 4,500 rpm briefly.
RChange gear in good time.
After 1,000 miles (1,500 km), you can increase
the engine speed gradually and bring the vehicle
to full speed.
You should also observe these notes on break-
ing-in if the engine or parts of the drive train on
your vehicle have been replaced.
Always observe the maxim
um permissible
speed.
Driving
Important safety notes
GWARNING
Objects in the driver's footwell can restrict the pedal travel or obstruct a depressed pedal.
The operating and road safety of the vehicle is
jeopardized. There is a risk of an accident.
Make sure that all objects in the vehicle are
stowed correctly, and that they cannot enter
the driver's footwell. Install the floormats
securely and as specified in order to ensure
sufficient clearance for the pedals. Do not use
loose floormats and do not place floormats on
top of one another.
GWARNING
Unsuitable footwear can hinder correct usage of the pedals, e.g.:
Rshoes with thick soles
Rshoes with high heels
Rslippers
There is a risk of an accident.
Wear suitable footwear to ensure correct
usage of the pedals.
GWARNING
If you switch off the ignition while driving,
safety-relevant functions are only available
with limitations, or not at all. This could affect, for example, the power steering and the brake
boosting effect. You will require considerably
more effort to steer and brake. There is a risk
of an accident.
Do not switch off the ignition while driving.
GWARNING
If the parking brake has not been fully
released when driving, the parking brake can:
Roverheat and cause a fire
Rlose its hold function.
There is a risk of fire and an accident. Release
the parking brake fully before driving off.
120Driving
Driving and parking

GWARNING
Flammable materials introduced through
environmental influence or by animals can
ignite if in contact with the exhaust system or
parts of the engine that heat up. There is a risk
of fire.
Carry out regular checks to make sure that
there are no flammable foreign materials in
the engine compartment or in the exhaust
system.
General notes
During a cold start, the engine runs at higher
speeds to enable the catalytic converter to
reach its operating temperature. The sound of
the engine may change during this time.
Automatic transmission
XShift the transmission to position P
(Ypage 129).
The transmission position display in the mul-
tifunction display shows P(
Ypage 129).
iYou can start the engine in transmission
position Pand N.
Starting procedure with the SmartKey
To start the engine using the SmartKey instead
of the Start/Stop button, pull the Start/Stop
button out of the ignition lock.
XTurn the SmartKey to position 3in the ignition
lock and release it as soon as the engine is
running (
Ypage 121).
Starting procedure with the Start/Stop
button
The Start/Stop button can be used to start the
vehicle manually without inserting the SmartKey
into the ignition lock. The Start/Stop button
must be inserted in the ignition lock and the
SmartKey must be in the vehicle. This mode for
starting the engine operates independently of
the ECO start/stop automatic engine start func-
tion.
You can start the engine if a valid SmartKey is in the vehicle. Switch off the engine and always
take the SmartKey with you when leaving the vehicle, even if you only leave it for a short time.
Pay attention to the important safety notes.
XDepress the brake pedal and keep it
depressed.
XPress the Start/Stop button once
(Ypage 121).
The engine starts.
Starting procedure via smartphone
Observe the important safety notes on starting
the engine (Ypage 122).
You can also start your engine via your smart-
phone from outside the vehicle. In this case, the
previously selected climate control setting is
activated. In this way you can cool or heat the
interior of the vehicle before starting the jour-
ney.
Only start the engine via your smartphone if it is
safe to start and run the engine where your vehi-
cle is parked.
Observe the legal stipulations in the area where your vehicle is parked. Engine start via smart-
phone may be limited to certain countries or
regions.
You can execute a maximum of two consecutive
starting attempts via your smartphone. If you
insert the SmartKey into the ignition lock, you
can carry out two more starting attempts.
Once you have started the engine, you can
switch the engine off via your smartphone at any
time.
You can only start the engine via your smart-
phone if:
Rthe SmartKey is in the ignition lock
Rpark position Pis selected
Rthe accelerator pedal is not depressed
Rthe anti-theft alarm system is not activated
Rthe panic alarm is not activated
Rthe hazard warning lamps are switched off
Rthe hood is closed.
Rthe doors are closed and locked
Rthe windows and sliding sunroof are closed
Also make sure that:
Rthe fuel tank is sufficiently filled
Rthe starter battery is sufficiently charged
GWARNING
Limbs could be crushed or trapped if the
engine is started unintentionally during ser-
Driving123
Driving and parking
Z

vice or maintenance work. There is a risk of
injury.
Always secure the engine against uninten-
tional starting before carrying out mainte-
nance or repair work.
Make sure that the engine cannot be started via
your smartphone before carrying out mainte-
nance or repairs. You can prevent an engine
start via your smartphone, for example, if you:
Rswitch on the hazard warning lamps
Rdo not lock the doors
Ropen the hood
Pulling away
General notes
GWARNING
If the engine speed is above the idling speed
and you engage transmission position Dor R,
the vehicle could pull away suddenly. There is
a risk of an accident.
When engaging transmission position Dor R,
always firmly depress the brake pedal and do not simultaneously accelerate.
Depress the accelerator carefully when pulling
away.
The vehicle locks centrally once you have pulled
away. The locking knobs in the doors drop down.
You can open the doors from the inside at any
time.
You can also deactivate the automatic locking
feature (
Ypage 184).
It is only possible to shift the transmission from
position Pto the desired position if you depress
the brake pedal. Only then can the parking lock
be deactivated.
All vehicles (except Mercedes-AMG vehi-
cles): if you do not depress the brake pedal, the
DIRECT SELECT lever can still be moved but the
parking lock remains engaged.
Mercedes-AMG vehicles: if you do not depress
the brake pedal, the selector lever can still be
moved but the parking lock remains engaged.
At transmission fluid temperatures below Ò4 ‡
(Ò20 †), you can only shift out of park position Pinto another transmission position when the
engine is running.
iUpshifts take place at higher engine speeds
after a cold start. This helps the catalytic con-
verter to reach its operating temperature
more quickly.
Information on the automatic release of the
electric parking brake (
Ypage 142).
Hill start assist
Hill start assist helps you when pulling away for-
wards or in reverse on an uphill gradient. It holds
the vehicle for a short time after you have
removed your foot from the brake pedal. This
gives you enough time to move your foot from
the brake pedal to the accelerator pedal and to
depress it before the vehicle begins to roll.
GWARNING
After a short time, hill start assist will no lon-
ger brake your vehicle and it could roll away.
There is a risk of an accident and injury.
Therefore, quickly move your foot from the
brake pedal to the accelerator pedal. Never
leave the vehicle when it is held by hill start
assist.
Hill start assist is not active if:
Ryou are pulling away on a level road or on a
downhill gradient.
Rthe transmission is in position N.
Rthe electric parking brake is applied.
RESP®is malfunctioning.
Further information on holding the vehicle sta-
tionary on uphill gradients (
Ypage 133).
ECO start/stop function
Introduction
The ECO start/stop function switches the
engine off automatically if the vehicle is stopped
under certain conditions.
The engine starts automatically when the driver
wants to pull away again. The ECO start/stop
function thereby helps you to reduce the fuel
consumption and emissions of your vehicle.
124Driving
Driving and parking

Important safety notes
GWARNING
If th eengin eis switched off automatically and
you exit th evehicle, th eengin eis restarte d
automatically. The vehicl emay begi nmoving .
Ther eis aris kof acciden tand injury.
If you wish to exit th evehicle, always tur noff
th eignition and secure th evehicl eagainst
rollin gaway.
General notes
:ECO start/sto pdisplay
The ECO start/sto pfunction is activated when -
eve ryou start th eengin eusin gth eSmartKey or
th eStart/Sto pbutton.
If th eengin ehas been switched off automati-
call yby th eECO start/sto pfunction ,th eè
ECO symbol is shown in th emultifunction dis-
play.
Mercedes-AM Gvehicles: theECO start/sto p
function is only available in driv eprogram C.
Automatic engine switch-off
If thevehicl eis braked to astandstill in Dor N,
th eECO start/sto pfunction switches off th e
engin eautomatically.
The ECO start/sto pfunction is operational
when :
Rtheindicator lamp in th eECO butto nis lit
green .
Rtheoutside temperature is within th erange
that is suitable for th esystem.
Rth eengin eis at normal operating tempera-
ture.
Rth eset temperature for th evehicl einterior
has been reached.
Rth ebattery is sufficientl ycharged.
Rth esystem detects that th ewindshield is no t
fogged up when th eair-conditioning system is
switched on .
Rthehoo dis closed.
Rth edriver' sdoor is closed and th edriver' s
seat belt is fastened.
All of th evehicle's systems remain active when
th eengin eis stoppe dautomatically.
The HOLD function can also be activated if th e
engin ehas been switched off automatically. It is
then no tnecessar yto continue applyin gth e
brakes during th eautomatic stop phase. When
you depress th eaccelerato rpedal ,th eengin e
start sautomatically and th ebraking effec tof
th eHOLD function is deactivated.
Automatic engin eswitch-off can tak eplac e a
maximum of four times in arow (initial stop, then
three subsequen tstops ).
Automatic engine start
The engin
estart sautomatically if:
Ryou switch off th eECO start/sto pfunction by
pressin gth eECO butto n
Rin transmission position Dor Nthebrak e
pedal is release dand th eHOLD function is no t
active
Ryou depress th eaccelerato rpedal
Ryou engage revers egear R
Ryou mov eth etransmission out of position P
Ryou unfasten your seat belt or open th edriv -
er' sdoor
Rth evehicl estart sto rol l
Rthebrak esystem require sthis
Rth etemperature in th evehicl einterior devi-
ate sfrom th eset range
Rth esystem detects moisture on th ewind-
shield when th eair-conditioning system is
switched on
Rth ebattery's condition of charge is to olow
Shifting th etransmission to position Pdoes no t
start th eengine.
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Driving and parking
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