key MERCEDES-BENZ CLA 2017 Workshop Manual

Important safety notes
G WARNIN G
If th e engin e is switched off automatically and
you exit th e vehicle, th e engin e is restarte d
automatically. The vehicl e may begi n moving .
Ther e is a ris k of acciden t and injury.
If you wish to exit th e vehicle, always tur n off
th e ignition and secure th e vehicl e against
rollin g away.
General notes
C
ECO start/sto p display
The ECO start/sto p function is activated when -
eve r you start th e engin e usin g th e SmartKey or
th e Start/Sto p button.
If th e engin e has been switched off automati-
call y by th e ECO start/sto p function , th e

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

You must make sure that fuel does not come
into contact with your skin, eyes or clothing
and that it is not swallowed. Do not inhale fuel
vapors. Keep fuel away from children.
If you or others come into contact with fuel,
observe the following: R
Wash away fuel from skin immediately
using soap and water. R
If fuel comes into contact with your eyes,
immediately rinse them thoroughly with
clean water. Seek medical assistance with-
out delay. R
If fuel is swallowed, seek medical assis-
tance without delay. Do not induce vomit-
ing. R
Immediately change out of clothing which
has come into contact with fuel.
G WARNING
Electrostatic buildup can create sparks and
ignite fuel vapors. There is a risk of fire and
explosion.
Always touch the vehicle body before opening
the fuel filler flap or touching the fuel pump
nozzle. Any existing electrostatic buildup is
thereby discharged.
! Do not use diesel to refuel vehicles with a
gasoline engine. Do not switch on the ignition
if you accidentally refuel with the wrong fuel.
Otherwise, the fuel will enter the fuel system.
Even small amounts of the wrong fuel could
result in damage to the fuel system and the
engine. Notify a qualified specialist workshop
and have the fuel tank and fuel lines drained
completely.
! Overfilling the fuel tank could damage the
fuel system.
! Take care not to spill any fuel on painted
surfaces. You could otherwise damage the
paintwork.
! Use a filter when adding fuel from a fuel can.
The fuel lines and/or the fuel injection system
could otherwise be blocked by particles from
the fuel can. Do not get into the vehicle again during the refu-
eling process. Otherwise, electrostatic charge
could build up again.
If you overfill the fuel tank, fuel could spray out
when the fuel pump nozzle is removed.
For further information on fuel and fuel quality
( Y
page 309).
Refueling
General information Pay attention to the important safety notes
( Y
page 137).
The fuel filler flap is unlocked/locked automat-
ically when you unlock/lock the vehicle with the
SmartKey.
The position of the fuel filler cap is displayed

Parking
Important safety notes
G WARNING
Flammable material such as leaves, grass or
twigs may ignite if they come into contact with
hot parts of the exhaust system or exhaust
gas flow. There is a risk of fire.
Park the vehicle so that no flammable mate-
rials come into contact with parts of the vehi-
cle which are hot. Take particular care not to
park on dry grassland or harvested grain
fields.
G WARNING
If you leave children unsupervised in the vehi-
cle, they could set it in motion by, for example: R
release the parking brake. R
shift the automatic transmission out of the
parking position P .R
start the engine.
In addition, they may operate vehicle equip-
ment and become trapped. 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 unsupervised in the vehicle.
! Always secure the vehicle correctly against
rolling away. Otherwise, the vehicle or its driv-
etrain could be damaged.
To ensure that the vehicle is secured against
rolling away unintentionally: R
the electric parking brake must be applied. R
the transmission must be in position P and the
transmission position display must show P .R
the SmartKey must be removed from the igni-
tion lock. R
on uphill or downhill gradients, the front
wheels must be turned towards the curb. Switching off the engine
Important safety notes
G WARNING
The automatic transmission switches to neu-
tral position N when you switch off the engine.
The vehicle may roll away. There is a risk of an
accident.
After switching off the engine, always switch
to parking position P . Prevent the parked vehi-
cle from rolling away by applying the parking
brake.
Automatic transmission X
Apply the electric parking brake. X
All vehicles (except Mercedes-AMG vehi-
cles): shift the transmission to position P .
X
Mercedes-AMG vehicles: press button C .X
With the SmartKey: turn the SmartKey to
position 0 in the ignition lock and remove it.
The immobilizer is activated. X
With the Start/Stop button: press the
Start/Stop button ( Y
page 121).
The engine stops and all the indicator lamps in
the instrument cluster go out.
When the driver's door is closed, this corre-
sponds to SmartKey position 1 . When the
driver's door is open, this corresponds to
SmartKey position 0 : "Key removed".
If you switch the engine off with the transmis-
sion in position R or D , the automatic transmis-
sion shifts to N automatically.
With the SmartKey: if you then open the driv-
er's door or the front-passenger door or remove140
Parking
Driving and parking

the SmartKey from the ignition, the automatic
transmission shifts to P automatically.
With the Start/Stop button: if you then open
the driver's door or the front-passenger door,
the automatic transmission shifts to P automat-
ically.
If you want the automatic transmission to
remain in neutral N , e.g. when having the vehicle
cleaned in an automatic car wash with a towing
system: X
Vehicles with the Start-Stop button:
remove the Start-Stop button from the igni-
tion lock. X
Insert the SmartKey into the ignition lock. X
All vehicles: switch the ignition on.X
Depress the brake pedal and keep it
depressed. X
Shift to neutral N .X
Release the brake pedal. X
Release the electric parking brake. X
Switch off the ignition and leave the SmartKey
in the ignition lock.
Electric parking brake
General notes
G WARNING
If you leave children unsupervised in the vehi-
cle, they could set it in motion by, for example: R
release the parking brake. R
shift the automatic transmission out of the
parking position P .R
start the engine.
In addition, they may operate vehicle equip-
ment and become trapped. 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 unsupervised in the vehicle. The function of the electric parking brake is
dependent on the on-board voltage. If the on-
board voltage is low or there is a malfunction in
the system, it may not be possible to apply the
released parking brake. X
If this is the case, only park the vehicle on
level ground and secure it to prevent it rolling
away. X
Shift the automatic transmission to position
P .
It may not be possible to release an applied
parking brake if the on-board voltage is low or
there is a malfunction in the system. Contact a
qualified specialist workshop.
The electric parking brake performs a function
test at regular intervals while the engine is
switched off. The s ounds that can be heard while
th is is occurring are normal.
Applying or releasing manually
X
To engage: push handle C .
When the electric parking brake is applied,
the red I (USA only) or $ (Canada
only) indicator lamp lights up in the instru-
ment cluster.
The electric parking brake can also be applied
when the SmartKey is removed. X
To release: pull handle C .
The red I (USA only) or $ (Canada
only) indicator lamp in the instrument cluster
goes out.
The electric parking brake can only be
released: R
when the SmartKey is in position 1 or 2 in
the ignition lock ( Y
page 121) orR
if the ignition was switched on using the
Start/Stop button Parking 141
Driving an d parking Z

Limited braking performance on salt-
treated roads If you drive on salted roads, a layer of salt resi-
due may form on the brake discs and brake
pads. This can result in a significantly longer
braking distance. R
In order to prevent any salt build-up, apply the
brakes occasionally while paying attention to
the traffic conditions. R
Carefully depress the brake pedal and the
beginning and end of a journey. R
Maintain a greater distance to the vehicle
ahead.
Servicing the brakes
! The brake fluid level may be too low, if: R
if the red brake warning lamp lights up in
the instrument cluster and R
you hear a warning tone while the engine is
running
Observe additional warning messages in the
multifunction display.
The brake fluid level may be too low due to
brake pad wear or leaking brake lines.
Have the brake system checked immediately.
Consult a qualified specialist workshop to
arrange this.
! A function or performance test should only
be carried out on a 2-axle dynamometer. If
you wish to operate the vehicle on such a
dynamometer, please consult a qualified spe-
cialist workshop in advance. You could oth-
erwise damage the drive train or the brake
system.
! As the ESP ®
system operates automatically,
the engine and the ignition must be switched
off (the SmartKey must be in position 0 or 1 in
the ignition lock) if: R
the electric parking brake is tested on a
brake dynamometer (for a maximum of
ten seconds) R
the vehicle is towed with the front axle
raised.
Braking triggered automatically by ESP ®
may
seriously damage the brake system.
All checks and maintenance work on the brake
system must be carried out at a qualified spe-
cialist workshop. Have brake pads installed and brake fluid
replaced at a qualified specialist workshop.
If the brake system has only been subject to
moderate loads, you should test the functional-
ity of your brakes at regular in t ervals.
You can find a description of Brake Assist (BAS)
on ( Y
page 60).
Mercedes-Benz recommends that you only have
brake pads/linings installed on your vehicle
which have been approved for Mercedes-Benz
vehicles or which correspond to an equivalent
quality standard. Brake pads/linings which have
not been approved for Mercedes-Benz vehicles
or which are not of an equivalent quality could
affect your vehicle's operating safety.
Mercedes-Benz recommends that you only use
brake fluid that has been specially approved for
your vehicle by Mercedes-Benz, or which corre-
sponds to an equivalent quality standard. Brake
fluid which has not been approved for
Mercedes-Benz vehicles or which is not of an
equivalent quality could affect your vehicle's
operating safety.
Checking brake lining thickness You can measure the break pad/lining thick-
ness using a test gage. Color-coding (green or
red) on the test gage allows you to determine
whether the brake pad/lining thickness is still
sufficient. The test gage is in the vehicle docu-
ment wallet in the glove box.
Front wheel146
Driving tips
Driving and parking

R
the steering wheel is in the straight-ahead
position. R
the vehicle is stationary and the brake pedal is
depressed (left foot). R
the transmission is in position D .R
one of the drive programs S , S+ or RACE is
selected. ( Y
page 128)
Activating RACE START X
Depress the brake pedal with your left foot
and keep it depressed. X
Pull and hold both steering wheel paddle shift-
ers. X
The RACE START Confirm: Paddle UP
Cancel: Paddle DOWN message appears in
the multifunction display. X
Release both steering wheel paddle shifters.
i If the activation conditions are no longer ful-
filled, RACE START is canceled. The RACE
START Not Possible See Operator's
Manual message appears in the multifunction
display. X
To cancel: pull the left steering wheel paddle
shifter ( Y
page 135).
or X
To confirm: pull the right steering wheel pad-
dle shifter ( Y
page 135).
The RACE START Available Depress gas
pedal message appears in the multifunction
display.
i If you do not depress the accelerator pedal
within a few seconds, RACE START is can-
celed. The multifunction display shows the
RACE START Canceled message.X
Fully depress the accelerator pedal.
The engine speed is increased.
The RACE START Release brake to start
message appears in the multifunction display.
i If you do not release the brake pedal within
a short time, RACE START will be canceled.
The multifunction display shows the RACE
START Canceled message.X
Take your foot off the brake, but keep the
accelerator pedal depressed.
The vehicle pulls away at maximum acceler-
ation.
The RACE START Active message appears in
the multifunction display. RACE START is deactivated when the vehicle
reaches a speed of approximately 50 km/h.
RACE START is deactivated immediately if you
release the accelerator pedal during RACE
START or if any of the activation conditions are
no longer fulfilled. The RACE START Not Pos‐
sible or RACE START Canceled message
appears in the multifunction display.
i If RACE START is used repeatedly within a
short period of time, it is only available again
after the vehicle has been driven a certain
distance.
AMG adaptive sport suspension sys-
tem
General notes The electronically controlled damping system
works continuously. This improves driving
safety and ride comfort.
The damping is tuned individually to each wheel
and depends on: R
your driving style, e.g. sporty R
the road surface condition, e.g. bumps R
your individual selection of "Sport" or "Com-
fort"
The suspension setting is adjusted using the
corresponding button in the center console.
i The mode can also be set using the AMG
DYNAMIC SELECT controller ( Y
page 128).
Each time you start the engine with the Smart-
Key or the Start/Stop button, Comfort mode is
activated. For further information about starting
the engine, see ( Y
page 122).
Sport mode158
Driving system s
Dr ivi ng an d parking