2018 MERCEDES-BENZ CLA engine

If you leave the engine or the auxiliary heating
running, make sure the exhaust pipe and area
around the vehicle are clear of snow. To
ensure an adequate supply of fresh air, open a
window on the side of the vehicle that is not
facing into the wind.
Have you rv ehicle winter-proofed at aq ualified
specialist workshop at the onset of winter.
Drive particularly carefully on slippery road sur-
faces. Avoid sudden acceleration, steering and
braking maneuvers. Do not use cruise control or
Distance Pilo tD ISTRONIC.
If the vehicle threatens to skid or cannot be
stopped when moving at low speed: X
Shift the transmission to position N .X
Try to bring the vehicle under control using
corrective steering.
The outsid et emperature indicator is not
designed to serve as an ice-warning device and
is therefore unsuitable for that purpose.
Changes in the outsid et emperature are dis-
played after as hort delay.
Indicated temperature sj ust above the freezing
point do not guarantee that the road surface is
free of ice. The road may still be icy, especially in
woode da rea soronb ridges.
You shoul dp ay specia la ttention to road condi-
tions when temperature sa re around freezing
point.
For more information on driving with snow
chains, see ( Y
page 290).
For more information on driving with summer
tires, see ( Y
page 289).
Observe the notes in the "Winter operation" sec-
tion ( Y
page 289).
Drivin gs ystems
Cruise control
General notes
Cruise control maintains ac onstant road speed
for you .Itb rakes automatically in order to avoid
exceeding the set speed .Onl ong and steep
downhill gradients, especially if the vehicle is
laden, you must select al ow gear in good time.
You need to shift manually using the steering
wheel paddle shifters beforehand. By doing so,
you wil lm ake use of the braking effect of the engine. This relieves the load on the brake sys-
tem and prevents the brakes from overheating
and wearing too quickly.
When the engine is running, you can use the
cruise control lever to limi tt he speed to any
speed betwee n20m ph (30 km/h )a nd the tech-
nicall yp ermitted maximum speed of the vehicle.
Use cruise control only if road and traffic con-
ditions make it appropriate to maintain as teady
speed for ap rolonge dp eriod.
The speed indicated in the speedometer may
differ slightly from the speed stored.
Important safety notes If you fail to adapt you rd riving style, cruise con-
trol can neither reduce the risk of an accident
nor override the law sofp hysics. Cruise control
cannot take into account the road, traffic and
weather conditions. Cruise control is only an
aid .Y ou are responsible for the distance to the
vehicle in front, for vehicle speed ,f or braking in
good time and for staying in you rl ane.
Do not use cruise control: R
in road and traffic conditions which do not
allow you to maintain ac onstant speed ,e .g. in
heavy traffic or on winding roads R
on slippery road surfaces .B raking or accel-
erating could cause the drive wheel stol ose
traction and the vehicle could then skid R
in poor visibility, e.g. due to fog, heavy rain or
snow
If there is ac hange of drivers, advise the new
driver of the speed stored.
Cruise control lever
C
Activates or increases speed
D
Activates or reduces speedDriving systems 149
Driving and parking Z

i When you switch off the engine, the last
speed stored is cleared.
Distance Pilot DISTRONIC
General notes Distance Pilot DISTRONIC regulates the speed
and automatically helps you maintain the dis-
tanc etot he vehicle detected in front. Vehicles
are detected with the aid of the radar sensor
system. Distance Pilot DISTRONIC brakes auto-
matically to avoid exceedin gt he set speed or to
maintain the designated distanc ef rom the vehi-
cle in front.
If Distance Pilot DISTRONIC detect st hat there is
ar isk of ac ollision, you will be warned visually
and acoustically. Without your intervention, Dis-
tanc eP ilot DISTRONIC cannot prevent ac olli-
sion. An intermittent warning ton ew ill then
sound and the distanc ew arning lamp will light
up in the instrument cluster. Brake immediately
in order to increase the distanc etot he vehicle in
fron tort ake evasive action provided it is safe to
do so.
Distance Pilot DISTRONIC operates in the range
between 0m ph (0 km/h) and 120 mph
(200 km/h).
Change into al ower gear in good time on long
and steep downhill gradients .T his is especially
importan tift he vehicle is laden. By doing so, you
will make use of the braking effect of the engine.
This relieves the load on the brake system and
prevent st he brakes from overheatin ga nd wear-
ing too quickly.
Do not use Distance Pilot DISTRONIC on roads
with steep gradients.
For Distance Pilot DISTRONIC to assist you
when driving, the radar sensor system must be
operational.
Sinc eD istance Pilot DISTRONIC transmits radar
waves, it can resemble the radar detectors of
the responsible authorities. You can refer to the
relevant chapter in the Operator' sM anual if
questions are asked about this.
i USA only: This device has been approved by
the FCC as a" Vehicular Radar System". The
radar sensor is intended for use in an auto-
motive radar system only. Removal, tamper-
ing, or altering of the device will void any war-
ranties, and is not permitted by the FCC. Do not tamper with, alter, or use in any non-
approved way.
An yu nauthorized modification to this device
could void the user's authority to operate the
equipment.
i Canada only: This device complies with
RSS-210 of Industry Canada. Operation is
subject to the following two conditions:
1. This device may not cause interference,
and
2. This device must accept any interference
received, including interference that may
cause undesired operation of the device.
Removal, tampering, or altering of the device
will void any warranties, and is not permitted.
Do not tamper with, alter, or use in any non-
approved way.
An yu nauthorized modification to this device
could void the user's authority to operate the
equipment.
Important safety notes
G WARNING
Distance Pilot DISTRONIC does not react to: R
people or animals R
stationary object sont he road, e.g. stopped
or parked vehicles R
oncoming vehicles and crossin gt raffic
As ar esult, Distance Pilot DISTRONIC may
neither give warnings nor intervene in such
situations. There is ar isk of an accident.
Always pay careful attention to the traffic sit-
uation and be ready to brake.
G WARNING
Distance Pilot DISTRONIC cannot always
clearly identif yo ther road users and complex
traffic situations.
In such cases, Distance Pilot DISTRONIC may: R
give an unnecessary warning and then
brake the vehicle R
neither give aw arning nor intervene R
accelerat eorb rake unexpectedly
There is ar isk of an accident.Driving systems 151
Driving and parking Z

To activate Distance Pilot DISTRONIC, the fol-
lowing conditions must be fulfilled: R
the engine must be started. It may take up to
two minutes of driving before Distance Pilot
DISTRONIC is ready for use. R
the electric parking brake must be released. R
ESP ®
must be active, but not intervening.R
Parking Pilot must not be activated. R
the transmission must be in position [ .R
the driver's door must be closed when you
shift from ] to [ or your seat belt must be
fastened. R
the front-passenger door must be closed. R
the vehicle must not skid.
Activating X
Briefly pull the cruise control lever towards
you

accelerate sm or eg ently. This settin gisr ecom-
mended in stop-and-start traffic.
Changing lanes If when driving on multilane roads you wish to
chang etot he overtakin gl ane ,D istance Pilot
DISTRONIC support sy ou if:R
you are driving faster than 45 mph (70 km/ h)R
Distance Pilo tD ISTRONI Ci sm ai ntaining the
distance to av ehicl einf rontR
yo us wi tch on the appropriate tur ns ig nalR
Distance Pilo tD ISTRONI Cd oe sn ot currently
detect ad an ge rofc ollision
If these conditions ar ef ul filled ,y ou rv ehicl ei s
accelerated .A cceleratio nw il lbei nterrupte di f
changing lanes take st oo long or if the distance
between your vehicl ea nd the vehicl einf ront
become st oo small.
Stopping If Distance Pilo tD ISTRONI Cd et ects tha tt he
vehicl einf ront is stopping, it brakes your vehicle
unti litiss tationary.
Once your vehicl eiss tationary, it remains sta-
tionar ya nd yo udon ot nee dtod ep ress the
brake.
i After at ime ,t he electri cp ar kin gb rake
secures the vehicl ea nd relieves the service
brake.
i Depending on the specifie dm inimu md is -
tance ,y ou rv ehicl ew il lc ome to as tandstil la t
as uf ficient distance behind the vehicl ei n
front. The specifie dm inimu md is tance is set
using the contro lont he cruis ec o ntro ll ev e
r.
When Distance Pilo tD ISTRONI Ci sa ctivated,
the transmission is shifted automaticall yt o
position ] if:R
the driver's sea tb el tisn ot fastened and the
driver's door is open. R
the engine is switched off ,u nless it is auto-
maticall ys wi tched off by the ECO start/stop
function.
The electri cp ar kin gb rake secures the vehicle
automaticall yifD istance Pilo tD ISTRONI Ci s
activated when the vehicl eiss tationar ya nd:R
as ys tem malfunctio no ccurs.R
the powe rs uppl yisi nsufficient.
If am al functio no ccurs, the transmission may
also shift to position ] automatically. Settin gas peedKee pinm in dt ha titm ay take ab rief moment
unti lt he vehicl eh as accelerated or braked to
the spee ds et. X
Press the cruis ec ontro ll ev er up C for a
highe rs peed or down D for al ower speed.X
To adjus tt he se ts peed in 1m ph incre-
ments (1 km/ hi nc rements): briefl yp ress
the cruis ec ontro ll ev er up C or down D to
the pressure point.
The last stored spee di ncreases or decreases
in 1m ph (1 km/h )i ncrements.X
To adjus tt he se ts peed in 5m ph incre-
ments (1 0k m/h increments): briefly press
the cruise control lever up C or down D
beyond the pressure point.
The last stored speed increases or decreases
in 5m ph (10 km/h) increments.
i Distance Pilot DISTRONIC is not deactivated
if you depress the accelerator pedal. If you
accelerat etoo vertake, Distance Pilot
DISTRONIC adjusts the vehicle's speed to the
last speed stored after you have finished over-
taking.
Setting as pecified minimum distanceYou can set the specified minimum distanc ef or
Distance Pilot DISTRONIC by varying the time
span between one and two seconds. With this
function you can set the minimum distanc et hat
Distance Pilot DISTRONIC maintains to the vehi-
cle in front, dependen tonv ehicle speed. You
can see this distanc eint he multifunction dis-
play ( Y
page 161).
The specified minimum distanc ec an be
changed while Distance Pilot DISTRONIC is
switched on or off.
i Make sure that you maintain the minimum
distanc etot he vehicle in fron tasr equired by
law. Adjust the distanc etot he vehicle in front
if necessary.154
Driving systems
Driving and parking

HOLD function
General notes The HOLD function can assist the drive rint he
following situations: R
when pulling away, especially on steep slopes R
when maneuvering on steep slopes R
when waiting in traffic
The vehicl eisk ept stationary without the driver
having to depress the brake pedal.
The braking effect is cancele da nd the HOLD
function deactivated when you depress the
accelerator peda ltop ul la way.
Important safety notes
G WARNING
When leaving the vehicle, it can still roll away
despite being braked by the HOLD function if: R
there is am alfunction in the system or in
the voltag es upply.R
the HOLD function has been deactivated by
pressing the accelerator peda lort he brake
pedal, e.g. by av ehicl eo ccupant.R
the electrical system in the engine com-
partment, the battery or the fuse sh ave
been tampere dw ith.R
the battery is disconnected
There is ar isk of an accident.
If you wis htoe xit the vehicle, alway st urn off
the HOLD function and secure the vehicle
against rolling away.
! When Distance Pilot DISTRONIC or the
HOLD function is activated, the vehicle
brakes automatically in certain situations.
To avoi dd amage to the vehicle, deactivate
Distance Pilot DISTRONIC and the HOLD
function in the following or similar situations: R
when towing the vehicle R
in the car wash
Deactivating the HOLD function ( Y
pag e1 57). Activation conditions You can activate the HOLD function if: R
the vehicl eiss tationary R
the engine is running or if it has been auto-
matically switched off by the ECO start/stop
function R
the driver's door is closed or you rs eat bel ti s
fastened R
the electric parking brake is released R
Distance Pilot DISTRONIC is deactivated R
the transmission is in position [ , ^ or \\
on vehicles with automatic transmission
Activating the HOLD function X
Make sure that the activation conditions are
met. X
Depress the brake pedal. X
Quickly depress the brake peda lf urther
until C appears in the multifunction display.
The HOLD function is activated. You can
release the brake pedal.
i If depressing the brake peda lt he first time
does not activate the HOLD function, wait
briefly and then try again.
Deactivatin gt he HOLD functionThe HOLD function is deactivated automatically
if: R
you accelerate. On vehicles with automatic
transmission: only when the transmission is in
position [ or ^ . R
the transmission is in position ] on vehicles
with automatic transmission. R
you depress the brake peda la gain with ac er-
tain amount of pressure until C disappears
from the multifunction display. R
you activate Distance Pilot DISTRONIC. R
you secure the vehicl eu sing the electric park-
ing brake.Driving systems 157
Driving and parking Z

i After at ime ,t he electri cp ar king brake
secures the vehicl ea nd relieves the service
brake.
Whe nt he HOLD functio ni sa ctivated ,t he trans-
mission is automaticall ys hifted to position ]
if: R
the driver's sea tb el tisn ot fastene da nd the
driver's door is open. R
the engine is switched off, unless it is auto-
maticall ys wi tched off by the ECO start/stop
function.
The electri cp ar king brake secures the vehicle
automaticall yift he HOLD functio ni sa ctivated
when the vehicl eiss tationar ya nd:R
as ys tem malfunctio no ccurs.R
the powe rs uppl yisi nsufficient.
Start-off Assist (except Mercedes-
AM Gv eh icles)
Important safety notes
G WARNING
If yo uu se start-off assist, individual wheels
ma ys tart to spi na nd the vehicl em ay skid. If
ESP ®
is deactivated ,t her eisag reate rd an ger
of skidding and having an accident. Make sure
tha tnop er sons or obstacle sa re in the vicinity
of the vehicle.
Start-off assist enables optimu ma cceleration
from as tandstill .F or this, as ui tabl yh ig h-grip
roa ds ur face is required ,a lo ng with the tire sa nd
vehicl eb ei ng in prope ro pe rating condition.
Do not activate start-off assist on public roads.
Observ et he safety notes on driving safety sys-
tems ( Y
page 61).
Be sure to rea dt he safety notes and information
on ESP ®
( Y
page 64).
Activatin gs tart-off assistX
Deactivate ESP ®
( Y
page 185).X
Turn the steering whee ltot he straight-ahead
position. X
Depres st he brake peda lh ar dw it hy ou rl ef t
foo ta nd kee pitd ep ressed.X
Shift the transmission to position D . X
Use the DYNAMIC SELEC Tb ut ton to select
the S drive progra m( Y
page 128).X
Quickly depress the accelerator peda lf ully.X
Take your foo to ff the brake, bu tk ee pt he
accelerator peda ld ep ressed.
The vehicl ep ulls away at maximu ma cceler-
ation.
i Activate ESP ®
as soo na st he acceleration
proces sh as ended .E SP ®
will otherwise not
be able to stabilize the vehicl eift he vehicle
starts to ski doraw heel starts to spin.
Canceling start-off assist X
Remove your foo tf rom the accelerator pedal.X
Reactivate ESP ®
.
RAC ES TART (Mercedes-AM Gv eh i-
cles)
Important safety notes
i RAC ES TAR Tm us tn ot be used on normal
roads. RAC ES TAR Tm us to nl ybea ctivated
and used on dedicate dr oa dc ircuits, outside
of public roa du se .
i RAC ES TAR Tiso nl ya vailable in
Mercedes ‑ AM Gv ehicles.
G WARNING
If yo uu se RAC ES TART, individual tire sm ay
start to spi na nd the vehicl ec ould skid.
Depending on the selecte dE SP ®
mode, there
is an increased ris kofs kidding and having an
accident. Make sure tha tnop er sons, animals
or obstacle sa re withi nr an ge of the vehicle.
RAC ES TAR Te nables optima la cceleratio nf rom
as tanding start. For this, as ui tabl yh ig h-grip
roa ds ur face is required and the vehicl ea nd tires
must be in goo dw or king order.
i Observ et he safety notes on driving safety
system s( Y
page 61).
Be sure to rea dt he safety notes and informa-
tio nonE SP ®
( Y
page 64).158
Driving systems
Driving an dp arking

X
Let go of the multifunction steering wheel. X
Back up the vehicle ,b eing ready to brake at all
times. When backing up, drive at as peed
belo wa pproximately 6m ph (10 km/h). Oth-
erwise, Parking Pilo tisc anceled immediately.
Parking Pilo tb rakes the vehicle to as tandstill
when the vehicle approaches the rear border
of the parking space.
Maneuvering may be required in tight parking
spaces.
The Parking Pilot Active Select D
Observe Surroundings messag ea ppears in
the multifunction display. X
Shift the transmission to position [ while
the vehicle is stationary.
Parking Pilo ti mmediately steers in the other
direction.
The Parking Pilot Active Accelerate
and Brake Observe Surroundings mes-
sage appears in the multifunction display.
i You wil la chieve the best results by waiting
for the steering procedure to complete before
pulling away. X
Drive forward sa nd be ready to brake at all
times.
Parking Pilo tb rakes the vehicle to as tandstill
when the vehicle approaches the front border
of the parking space.
Maneuvering may be required in tight parking
spaces.
The Parking Pilot Active Select R
Observe Surroundings messag ea ppears in
the multifunction display.
As soon as the parking procedure is complete,
the Parking Pilot Finished message
appears and aw arning tone sounds. The vehicle
is now parked.
The vehicle is kept stationary withou tt he driver
having to depres st he brake pedal. The braking
effect is canceled when you depres st he accel-
erator pedal.
Parking Pilo tnol onger supports you with steer-
ing interventions and brake applications. When
Parking Pilo tisf inished ,y ou must steer and
brake again yourself. Parking Assist
PARKTRONIC is still available.
Parking tips: R
The way you rv ehicle is positioned in the park-
ing space after parking is dependent on vari-
ous factors. These include the positio na nd
shape of the vehicle sp arked in front and behind it and the conditions of the location. It
may be the case that Parking Pilo tg uides you
too far into ap arking space, or not far enough
into it. In some cases, it may also lea dy ou
across or onto the curb. If necessary ,y ou
shoul dc ancel the parking procedure with
Parking Pilot. R
You can also preselect transmission position
[ .T he vehicle redirects and does not drive
as far into the parking space. Should the
transmission change take place too early, the
parking procedure is canceled. As ensible
parking positio nc an no longer be achieved
from this position.
Exitin gap arking spaceIn order for Parking Pilo ttos upport you when
exiting the parking space: R
you need to have parked using Parking Pilot. R
the border of the parking space must be high
enough at the front and the rear. Ac urb stone
is too small ,f or example. R
the border of the parking space must not be
too wide, as the positio noft he vehicle must
not exceed an angle of 45° to the starting
positio nasitism aneuvered into the parking
space. R
am aneuvering distance of at least 3.3 ft
(1.0 m) must be available.
Parking Pilo tc an assist you with exiting ap ark-
ing space only if you have parked the vehicle
parallel to the direction of travel using Parking
Pilot.
i If Parking Assist PARKTRONIC detects
obstacles, Parking Pilo tb rakes automatically
whilst the vehicle is exiting the parking space.
You are responsible for braking in good time. X
Start the engine. X
Release the electric parking brake. X
Switch on the turn signal in the direction you
wil ld rive out of the parking space. X
Shift the transmission to position [ or ^ .
The Start Parking Pilot? Yes: OK No:
8 messag ea ppears in the multifunction
display. X
To cancel the procedure: press the 8
button on the multifunction steering whee lo r
pul la way.
or166
Driving systems
Driving and parking

Important safety notes
G WARNIN G
If you operate information systems and com-
munication equipmen ti ntegrate dint he vehi-
cle when driving ,y ou may be distracte df ro m
th et ra ffic situation .Y ou could also lose con-
trol of th ev ehicle. Ther eisar is kofana cci-
dent.
Only operate this equipmen tw hen th et ra ffic
situation permits. If you are no ts ur et ha tt hi s
is possible ,p ark th ev ehicl ep ayin ga ttention
to traffic condition sa nd operate th ee quip-
men tw hen th ev ehicl eiss ta tionary.
You must observ et he legal requirements for th e
country in whic hy ou are currentl yd riving when
operating th eo n-bo ard computer.
G WARNIN G
If th ei nstrumen tc luste rh as faile dorm al-
functioned, you may no tr ecognize function
restriction sins ystems relevan ttos afety. The
operating safet yofy our vehicl em ay be
impaired .T her eisar is kofana ccident.
Drive on carefully. Hav et he vehicl ec hecked
at aq ualified specialist workshop immedi-
ately.
The on-board computer only shows message so r
warning sf ro mc ertai ns ystems in th em ultifunc-
tion display. You should therefor em ak es ur e
your vehicl eiso perating safely at all times .
If th eo perating safet yofy our vehicl ei s
impaired ,p ull ove rass oo nasitiss af etodos o.
Contac taq ualified specialist workshop.
Fo rano verview, see th ei nstrumen tp anel illus-
tration ( Y
page 33).
Display sa nd operation
Instrumen tc luster lighting
The ligh ts ensor in th ei nstrumen tc luste ra uto -
matically control st he brightness of th em ulti-
function display. In daylight, th ed isplays in th e
instrumen tc luste ra re no ti lluminated. The lighting in th ei nstrumen tc luster, in th ed is-
plays and th ec ontrols in th ev ehicl ei nterior can
be adjusted usin gt he brightness control knob.
The brightness control knob is locate dont he
botto ml ef toft he instrumen tc luste r
( Y
page 33). X
Turn th eb rightness control knob clockwise or
counter-clockwise.
If th el igh ts witch is set to th e X , ` or
X position ,t he brightness is dependen t
upon th eb rightness of th ea mbien tl ight.
Speedometer with segments The speedometer is divided int os egments on
vehicles wit hD istance Pilot DISTRONIC.
The segments in th es peedometer indicat e
whic hs pee dr ange is available. R
Distanc eP ilot DISTRONI Cisa ctivated
( Y
page 151):
On eort wo segments in th es et spee dr ange
ligh tu p. R
Distanc eP ilot DISTRONI Cd etects av ehicl ei n
fron tm oving mor es lowly than th es to re d
speed:
The segments between th es pee doft he vehi-
cle in fron ta nd th es to re ds pee dl igh tu p.
Tachometer
! Do no td riv eint he overrevving range, as this
could damag et he engine.
The red ban dint he tachometer indicates th e
engine's overrevving range.
The engin eisl imite dw ithin ar ange to protect
th ee ng in ew hen th er ed ban disr eached.
Outsid et emperatur ed isplayYou should pay special attention to road condi-
tion sw hen temperatures are aroun df re ezing
point.
Bea rinm in dt ha tt he outside temperature dis-
play indicates th et em perature measured and
does no tr ecord th er oad temperature.
The outside temperature display is in th em ulti-
function display ( Y
page 179).176
Display sa nd operation
On-boar dc omputer and displays