2017 MERCEDES-BENZ CLA stop start

! Do not warm up the engine with the vehicle
stationary. Drive off immediately. Avoid high
engine speeds and driving at full throttle until
the engine has reached its operating temper-
ature.
Only shift the automatic transmission to the
desired drive position when the vehicle is sta-
tionary.
Where possible, avoid spinning the drive
wheels when pulling away on slippery roads.
You could otherwise damage the drive train.
! Mercedes-AMG vehicles: avoid full-load
operation and engine speeds greater than
5000 rpm when the engine is cold. This helps
to protect the engine and avoids uncomfort-
able driving.
SmartKey positions
SmartKey
Z
To remove the SmartKey
(shift the transmission to position P )G
Power supply for some consumers, such as
the windshield wipersH
Ignition (power supply for all consumers)
and drive position
I
To start the engine
i The SmartKey can be turned in the ignition
lock even if it is not the correct SmartKey for
the vehicle. The ignition is not switched on.
The engine cannot be started. Start/Stop button General notes Vehicles with KEYLESS-GO are equipped with
SmartKeys featuring the integrated KEYLESS-
GO function and a detachable Start/Stop but-
ton.
A check which periodically establishes a radio
connection between the vehicle and the Smart-
Key determines whether a valid SmartKey is in
the vehicle. This occurs, for example, when
starting the engine.
When you insert the Start/Stop button into the
ignition lock, the system needs approximately
two seconds recognition time. You can then use
the Start/Stop button.
Pressing the Start/Stop button several times in
succession corresponds to the different Smart-
Key positions in the ignition lock. This is only the
case if you are not depressing the brake pedal.
If you depress the brake pedal and press the
Start/Stop button, the engine starts immedi-
ately.
To start the vehicle without actively using the
SmartKey: R
the Start/Stop button must be inserted in the
ignition lock. R
the SmartKey must be in the vehicle. R
the vehicle must not be locked with the
SmartKey or KEYLESS-GO ( Y
page 70)
Do not keep the KEYLESS-GO key: R
with electronic devices, e.g. a mobile phone
or another SmartKey. R
with metallic objects, e.g. coins or metal foil. R
inside metallic objects, e.g. a metal case
This can affect the functionality of KEYLESS-GO.
If you lock the vehicle with the SmartKey remote
control or with KEYLESS-GO, after a short time: R
you will not be able to switch on the ignition
with the Start/Stop button. R
you will no longer be able to start the engine
with the Start/Stop button until the vehicle is
unlocked again
If you lock the vehicle centrally using the button
on the front door ( Y
page 75), you can continue
to start the engine with the Start/Stop button.
The engine can be switched off while the vehicle
is in motion by pressing and holding the Start/
Stop button for three seconds. This function Driving 121
Driving and parking Z

operates independently of the ECO start/stop
automatic engine switch-off function.
Key positions with the Start/Stop button
C
Start/Stop buttonD
Ignition lock
As soon as the ignition is switched on, all the
indicator lamps in the instrument cluster light
up.
For further information on situations in which an
indicator lamp either fails to go out after the
engine is started or lights up while driving,
please refer to "Warning and indicator lamps in
the instrument cluster" ( Y
page 217).
If Start/Stop button C has not yet been
pressed, this corresponds to the SmartKey
being removed from the ignition. X
To switch on the power supply: press
Start/Stop button C once.
The power supply is switched on. You can now
activate the windshield wipers, for example.
The power supply is switched off again if: R
the driver's door is opened and R
you press Start/Stop button C twice when in
this position X
To switch on the ignition: press Start/Stop
button C twice.
The ignition is switched on.
If you press Start/Stop button C once when
in this position, the ignition is switched off
again.
Removing the Start/Stop button
You can remove the Start/Stop button from the
ignition lock and start the vehicle as normal
using the SmartKey.
You can only switch between Start/Stop button
mode and SmartKey operation when the vehicle
is stationary. You must also engage park position P .X
Remove Start/Stop button C from ignition
lock D .
You do not have to remove the Start/Stop but-
ton from the ignition lock when you leave the
vehicle. You should, however, always take the
SmartKey with you when leaving the vehicle. As
long as the SmartKey is in the vehicle: R
the vehicle can be started using the Start/
Stop button R
the electrically powered equipment can be
operated
Starting the engine
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 P R
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.
G WARNING
Combustion engines emit poisonous exhaust
gases such as carbon monoxide. Inhaling
these exhaust gases leads to poisoning. There
is a risk of fatal injury. Therefore never leave
the engine running in enclosed spaces with-
out sufficient ventilation.122
Driving
Driving and parking

G WARNING
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 X
Shift the transmission to position P
( Y
page 129).
The transmission position display in the mul-
tifunction display shows P ( Y
page 129).
i You can start the engine in transmission
position P and 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. X
Turn the SmartKey to position 3 in the ignition
lock and release it as soon as the engine is
running ( Y
page 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. X
Depress the brake pedal and keep it
depressed. X
Press the Start/Stop button once
( Y
page 121).
The engine starts.
Starting procedure via smartphone Observe the important safety notes on starting
the engine ( Y
page 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: R
the SmartKey is in the ignition lock R
park position P is selected R
the accelerator pedal is not depressed R
the anti-theft alarm system is not activated R
the panic alarm is not activated R
the hazard warning lamps are switched off R
the hood is closed. R
the doors are closed and locked R
the windows and sliding sunroof are closed
Also make sure that: R
the fuel tank is sufficiently filled R
the starter battery is sufficiently charged
G WARNING
Limbs could be crushed or trapped if the
engine is started unintentionally during ser- Driving 123
Driving and parking Z

Deactivating or activating th e ECO
start/stop function X
To deactivate : press EC O butto n C .
Indicator lamp D goe s out .X
To activate : press EC O butto n C .
Indicator lamp D lights up.
If indicator lamp D is off, th e EC O start/sto p
function has bee n deactivated manually or as
th e result of a malfunction . The engin e will then
no t be switched of f automatically when th e vehi-
cl e stops . AMG Performance exhaust syste m
(Mercedes-AMG vehicles )You can choos e between differen t AM G Per -
formanc e exhaus t system volume s usin g th e
position of th e exhaus t flap .
Each time you start th e engin e wit h th e Smart -
Key or th e Start/Sto p button, th e quietest set -
ting is activated.
Settin g th e volume : X
Press butto n C .
If you selec t th e loudest setting , indicator
lamp D lights up.
Problem s wit h th e engin eProblem
Possible causes/consequences an d P Solutions
The engin e doe s no t
start . The HOLD function or Distanc e Pilo t DISTRONIC is activated.X
Deactivat e th e HOLD function ( Y
page 156) or Distanc e Pilo t
DISTRONIC ( Y
page 154).X
Tr y to start th e engin e again .
The engin e doe s no t
start . The starter moto r
can be heard. R
There is a malfunction in th e engin e electronics.R
There is a malfunction in th e fue l supply.
Before attemptin g to start th e engin e again :X
Tur n th e SmartKey bac k to position 0 in th e ignition lock.
or X
Press th e Start/Sto p butto n repeatedly until all indicator lamp s in
th e instrumen t cluster go out .X
Tr y to start th e engin e again ( Y
page 122). Avoid excessivel y lon g
and frequent attempt s to start th e engin e as these will drain th e
battery.
If th e engin e doe s no t start after severa l attempts:X
Consult a qualified specialis t workshop .126
Driving
Driving and parking

Problem
Possible causes/consequences and P Solutions
The engine does not
start. You cannot hear
the starter motor. The on-board voltage is too low because the battery is too weak or
discharged. X
Jump-start the vehicle ( Y
page 273).
If the engine does not start despite attempts to jump-start it: X
Consult a qualified specialist workshop.
The starter motor was exposed to a thermal load that was too high. X
Allow the starter motor to cool down for approximately two minutes. X
Try to start the engine again.
If the engine still does not start: X
Consult a qualified specialist workshop.
The engine is not running
smoothly and is misfir-
ing. There is a malfunction in the engine electronics or in a mechanical
component of the engine management system. X
Only depress the accelerator pedal slightly.
Otherwise, non-combusted fuel may get into the catalytic converter
and damage it. X
Have the cause rectified immediately at a qualified specialist work-
shop.
The coolant temperature
gauge shows a value
above 248 ‡ (120 †).
The coolant warning
lamp may also be on and
a warning tone may
sound. The coolant level is too low. The coolant is too hot and the engine is no
longer being cooled sufficiently. X
Stop as soon as possible and allow the engine and the coolant to
cool down. X
Check the coolant level ( Y
page 257). Observe the warning notes
as you do so and add coolant if necessary.
DYNAMIC SELECT button (all vehicles
except Mercedes-AMG vehicles) Use the DYNAMIC SELECT button to change the
drive program. Depending on the drive program
selected the following vehicle characteristics
will change: R
the drive (engine and transmission manage-
ment) R
the suspension (vehicles with damping sys-
tem or AMG adaptive sport suspension sys-
tem) R
the steering. R
the availability of the ECO start/stop function R
the climate control
Each time you start the engine with the Smart-
Key or the Start/Stop button, drive program C is
activated. For further information about starting
the engine, see ( Y
page 122). X
Press DYNAMIC SELECT button C as many
times as necessary until the desired drive
program is selected.
The selected drive program appears in the
multifunction display. After five seconds the
display goes out and the status icon of the
selected drive program appears.DYNAMIC SELECT button (all vehicles except Mercedes-AMG vehicles) 127
Driving and parking Z

In addition, the current drive program settings
are displayed briefly in the multimedia system
display.
i In a few countries, the ECO start/stop func-
tion is deactivated at the factory due to the
available fuel grade. In this case, the ECO
start/stop function is not available in any
drive program, regardless of the display in the
multimedia system display.
Available drive programs:
C Comfort Comfortable and economi-
cal driving characteristics
S Sport Sporty driving characteris-
tics
I Individual Individual settings
E Economy Particularly economical
driving characteristics
Additional information for drive programs
( Y
page 133).
You can also change gear yourself using the
steering wheel paddle shifters. For further infor-
mation on the manual drive program
( Y
page 135).
DYNAMIC SELECT controller
(Mercedes-AMG vehicles) Use the DYNAMIC SELECT controller to change
the drive program. Depending on the drive pro-
gram selected the following vehicle character-
istics will change: R
the drive R
the transmission management R
ESP ®
R
the suspension (vehicles with AMG adaptive
sport suspension system) R
the availability of the ECO start/stop function R
the availability of gliding mode
Each time you start the engine with the Smart-
Key or the Start/Stop button, drive program C is
activated. For further information about starting
the engine, see ( Y
page 122). X
Turn DYNAMIC SELECT controller C as many
times as necessary until the desired drive
program is selected.
The selected drive program appears in the
multifunction display. After five seconds the
display goes out and the status icon of the
selected drive program appears.
The drive program indicator on DYNAMIC
SELECT controller C lights up in red.
Available drive programs:
I Individual Individual settings
C Comfort Comfort-oriented, opti-
mum-economy engine and
transmission settings
S Sport Sporty engine and trans-
mission settings
S+ Sport Plus Particularly sporty trans-
mission settings
Race
Maximum sportiness and
engine and transmission
settings suitable for the
racetrack
Additional information for drive programs
( Y
page 133).
You can also change gear yourself using the
steering wheel paddle shifters. For further infor-
mation on the manual drive program
( Y
page 135).128
DYNAMIC SELECT controller (Mercedes-AMG vehicles)
Driving and parking

Transmission positions E Park position
This prevents the vehicle from rolling
away when stopped.
Only shift the transmission into posi-
tion P when the vehicle is stationary.
The parking lock should not be used
as a brake when parking. Always
apply the electronic parking brake in
addition to the parking lock in order
to secure the vehicle.
If the vehicle electronics are malfunc-
tioning, the transmission may be
locked in position P . Have the vehicle
electronics checked immediately at a
qualified specialist workshop.
Park position P is automatically
engaged if: R
you switch off the engine using the
SmartKey and remove the Smart-
Key R
you switch off the engine using the
SmartKey or using the Start/Stop
button and open the driver's door
or front-passenger door R
the driver's door is opened when
the vehicle is stationary or driving
at very low speed and the trans-
mission is in position D or R
F Reverse gear
Only shift the transmission into posi-
tion R when the vehicle is stationary. D Neutral
Do not shift the transmission to N
while driving. Otherwise, the auto-
matic transmission could be dam-
aged.
No power is transmitted from the
engine to the drive wheels.
Releasing the brakes will allow you to
move the vehicle freely, e.g. to push
it or tow it.
If ESP ®
is deactivated or faulty: shift
the transmission to position N if the
vehicle is in danger of skidding, e.g.
on icy roads.
If you switch the engine off with the
transmission in position R or D , the
automatic transmission shifts to N
automatically.
! Rolling in neutral N can damage
the drive train.
: Drive
The automatic transmission changes
gear automatically. All forward gears
are available.
Driving tips
Changing gear The automatic transmission shifts to the indi-
vidual gears automatically when it is in trans-
mission position D . This automatic gear shifting
behavior is determined by: R
the selected drive program R
the position of the accelerator pedal R
the road speed
Accelerator pedal position Your style of driving influences how the auto-
matic transmission shifts gear: R
little throttle: early upshifts R
more throttle: late upshifts132
Automatic transmission
Driving an d parking

R
gliding mode is not available. R
the ECO start/stop function is not available.
Drive program S+ (Sport Plus) Drive program S+ is characterized by the fol-
lowing: R
the vehicle exhibits particularly sporty driving
characteristics. R
the automatic transmission shifts up later. R
the fuel consumption possibly being higher as
a result of the later automatic transmission
shift points. R
the suspension exhibits particularly stiff
springing and damping settings (vehicles with
AMG adaptive sport suspension system). R
gliding mode is not available. R
the ECO start/stop function is not available.
Drive program RACE (vehicles with AMG
adaptive sport suspension system) The RACE drive program is characterized by the
following: R
the vehicle exhibits driving characteristics
suitable for the racetrack. R
all vehicle systems are set for maximum
sportiness. R
the automatic transmission shifts up later. R
the fuel consumption possibly being higher as
a result of the later automatic transmission
shift points. R
the suspension exhibits particularly hard
springing and damping settings. R
gliding mode is not available. R
the ECO start/stop function is not available.
Manual gear shifting
General notes You can change gear yourself using the steering
wheel paddle shifters. The transmission must be
in position D .
Depending on which steering wheel paddle
shifter is pulled, the automatic transmission
immediately shifts into the next gear down or
up, if permitted. Mercedes-AMG vehicles: to use manual shift-
ing, you have two options: R
temporary setting R
permanent setting
If you activate manual gearshifting, the multi-
function display will show the current gear
instead of transmission position D .
If manual gearshifting is deactivated, the gears
will be selected automatically.
Temporary setting X
To activate: shift the DIRECT SELECT lever to
position D . X
Pull steering wheel paddle shifter C or D .
Temporary setting will be active for a certain
amount of time. Under certain conditions the
minimum amount of time is extended, e.g. in the
case of lateral acceleration, during an overrun
phase or when driving on steep terrain. X
To deactivate: pull steering wheel paddle
shifter D and hold it in place.
or X
Use the DIRECT SELECT lever to switch the
transmission position.
or X
All vehicles (except Mercedes-AMG vehicles):
use the DYNAMIC SELECT button to change
the drive program.
Mercedes-AMG vehicles: use the DYNAMIC
SELECT controller to change the drive pro-
gram.Automatic transmission 135
Driving and parking Z