light MERCEDES-BENZ CLA 2019 Workshop Manual

Deactivating or activating the ECO
start/stop function
XTo deactivate:press ECO buttonC.Indicator lampDgoes out.
XTo activate:press ECO buttonC.Indicator lampDlights up.
If indicator lampDis off, the ECO start/stopfunction has been deactivated manually or asthe result of a malfunction. The engine will thennot be switched off automatically when the vehi-cle stops.
AMG Performance exhaust system
(Mercedes-AMG vehicles)
You can choose between different AMG Per-formance exhaust system volumes using theposition of the exhaust flap.
Each time you start the engine with the Smart-Key or the Start/Stop button, the quietest set-ting is activated.
Setting the volume:
XPress buttonC.If you select the loudest setting, indicatorlampDlights up.
Problems with the engine
ProblemPossible causes/consequences andPPSolutions
The engine does notstart.The HOLD function or Active Distance Assist DISTRONIC is activated.
XDeactivate the HOLD function (Ypage 159) or Active DistanceAssist DISTRONIC (Ypage 156).
XTry to start the engine again.
The engine does notstart. The starter motorcan be heard.
RThere is a malfunction in the engine electronics.
RThere is a malfunction in the fuel supply.
Before attempting to start the engine again:
XTurn the SmartKey back to positionZin the ignition lock.
or
XPress the Start/Stop button repeatedly until all indicator lamps inthe instrument cluster go out.
XTry to start the engine again. Avoid excessively long and frequentattempts to start the engine as these will drain the battery.
If the engine does not start after several attempts:
XConsult a qualified specialist workshop.
128Driving
Driving and pa rking

ProblemPossible causes/consequences andPPSolutions
The engine does notstart. You cannot hearthe starter motor.
The on-board voltage is too low because the battery is too weak ordischarged.
XJump-start the vehicle (Ypage 282).
If the engine does not start despite attempts to jump-start it:
XConsult a qualified specialist workshop.
The starter motor was exposed to a thermal load that was too high.
XAllow the starter motor to cool down for approximately two minutes.
XTry to start the engine again.
If the engine still does not start:
XConsult a qualified specialist workshop.
The engine is not runningsmoothly and is misfir-ing.
There is a malfunction in the engine electronics or in a mechanicalcomponent of the engine management system.
XOnly depress the accelerator pedal slightly.Otherwise, non-combusted fuel may get into the catalytic converterand damage it.
XHave the cause rectified immediately at a qualified specialist work-shop.
The coolant temperaturegauge shows a valueabove 248 ‡ (120 †).The coolant warninglamp may also be on anda warning tone maysound.
The coolant level is too low. The coolant is too hot and the engine is nolonger being cooled sufficiently.
XStop as soon as possible and allow the engine and the coolant tocool down.
XCheck the coolant level (Ypage 263). Observe the warning notesas you do so and add coolant if necessary.
Notes on towing vehicles
The vehicle is not suitable for attaching tow barsystems, such as those used for flat towing ordinghy towing.
Attaching or using tow bar systems may result indamage to the vehicle.
When towing a vehicle with tow bar systems,safe driving characteristics cannot be guaran-teed for the towing vehicle or the towed vehicle.
The vehicle/trailer combination may swerve.
Observe the permissible towing methods(Ypage 287) and the notes on towing with bothaxles on the ground (Ypage 286).
DYNAMIC SELECT button (all vehicles
except Mercedes-AMG vehicles)
Use the DYNAMIC SELECT button to change thedrive program. Depending on the drive programselected the following vehicle characteristicswill change:
Rthe drive (engine and transmission manage-ment)
Rthe suspension (vehicles with damping sys-tem or AMG adaptive sport suspension sys-tem)
Rthe sound of the exhaust system (vehicleswith sports exhaust system)
Rthe steering
Rthe availability of the ECO start/stop function
Rthe climate control
Each time you start the engine with the Smart-Key or the Start/Stop button, drive programCis
DYNAMIC SELECT button (all vehicles except Mercedes-AMG vehicles)129
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activated. For further information about startingthe engine, see (Ypage 124).
XPress DYNAMIC SELECT buttonCas manytimes as necessary until the desired driveprogram is selected.The selected drive program appears in themultifunction display. After five seconds, thedisplay goes out and the status symbol of theselected drive program appears.
In addition, the current drive program settingsare displayed briefly in the multimedia systemdisplay.
iIn a few countries, the ECO start/stop func-tion is deactivated at the factory due to theavailable fuel grade. In this case, the ECOstart/stop function is not available in anydrive program, regardless of the display in themultimedia system display.
Available drive programs:
CComfortComfortable and economi-cal driving characteristics
SSportSporty driving characteris-tics
IIndividualIndividual settings
EEconomyParticularly economicaldriving characteristics
Additional information for drive programs(Ypage 135).
You can also change gear yourself using thesteering wheel paddle shifters. For further infor-mation on the manual drive program(Ypage 137).
DYNAMIC SELECT controller
(Mercedes-AMG vehicles)
Use the DYNAMIC SELECT controller to changethe drive program. Depending on the drive pro-gram selected the following vehicle character-istics will change:
Rthe drive
Rthe transmission management
RESP®
Rthe suspension (vehicles with AMG adaptivesport suspension system)
Rthe sound of the exhaust system
Rthe availability of the ECO start/stop function
Rthe availability of gliding mode
Each time you start the engine with the Smart-Key or the Start/Stop button, drive programCisactivated. For further information about startingthe engine, see (Ypage 124).
XTurn DYNAMIC SELECT controllerCas manytimes as necessary until the desired driveprogram is selected.The selected drive program appears in themultifunction display. After five seconds thedisplay goes out and the symbol of the selec-ted drive program appears.
The drive program indicator on DYNAMICSELECT controllerClights up in red.
Available drive programs:
IIndividualIndividual settings
CComfortComfort-oriented, opti-mum-economy engine andtransmission settings
SSportSporty engine and trans-mission settings
130DYNAMIC SELECT controller (Mercedes-AMG vehicles)
Driving and parking

Additionally, children could set the vehicle in
motion if, for example, they:
Rrelease the parking brake
Rshift the automatic transmission out of park
position]
Rstart the engine
There is a risk of an accident and injury.
Never leave children or animals unattended in
the vehicle.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. This
also applies for the Digital Vehicle Key if the
"Digital Vehicle Key" function is activated via
Mercedes me connect.
The function of the electric parking brake isdependent on the on-board voltage. If the on-board voltage is low or there is a malfunction inthe system, it may not be possible to apply thereleased parking brake.
XIf this is the case, only park the vehicle onlevel ground and secure it to prevent it rollingaway.
XShift the automatic transmission to position].
It may not be possible to release an appliedparking brake if the on-board voltage is low orthere is a malfunction in the system. Contact aqualified specialist workshop.
The electric parking brake performs a functiontest at regular intervals while the engine isswitched off. The sounds that can be heard whilethis is occurring are normal.
Applying or releasing manually
XTo engage:push handleC.When the electric parking brake is applied,the redI(USA only) or$(Canadaonly) indicator lamp lights up in the instru-ment cluster.
The electric parking brake can also be appliedwhen the SmartKey is removed.
XTo release:pull handleC.The redI(USA only) or$(Canadaonly) indicator lamp in the instrument clustergoes out.
The electric parking brake can only bereleased:
Rif the SmartKey is in positionGorHinthe ignition lock (Ypage 123) or
Rif the ignition was switched on using theStart/Stop button
Applying automatically
The electric parking brake is automaticallyapplied when the transmission is in position]and:
Rthe engine is switched off or
Rthe driver is not wearing a seat belt and thedriver's door is opened
To prevent the electric parking brake from beingautomatically applied, pull handleC.
The electric parking brake is also applied auto-matically if:
RActive Distance Assist DISTRONIC brings thevehicle to a standstill or
Rthe HOLD function is keeping the vehicle sta-tionary
RActive Parking Assist is keeping the vehiclestationary
In addition, at least one of the following condi-tions must be fulfilled:
Rthe engine is switched off
Rthe driver is not wearing a seat belt and thedriver's door is opened
Rthere is a system malfunction
Rthe power supply is insufficient
Rthe vehicle is stationary for a lengthy period
The redI(USA only) or$(Canada only)indicator lamp in the instrument cluster goesout.
The electric parking brake is not automaticallyapplied if the engine is switched off by the ECOstart/stop function.
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Driving an d parking

The ECO display consists of three sections, withan inner and outer area. The sections corre-spond to the following three categories:
CAcceleration(evaluation of theacceleration processes):
Rthe outer area fills up and the innerarea lights up green: moderateacceleration, especially at higherspeeds
Rthe outer area empties and theinner area is gray: sporty acceler-ation
DCoasting(evaluation of all decelera-tion processes):
Rthe outer area fills up and the innerarea lights up green: anticipatorydriving, keeping your distance andearly release of the accelerator.The vehicle can coast without useof the brakes.
Rthe outer area empties and theinner area is gray: frequent heavybraking

helps you to avoid overheating the brakes andwearing them out excessively.
When you take advantage of engine braking, itis possible that a drive wheel will not rotate forsome time, e.g. on a slippery road surface.This could cause damage to the drive train.This type of damage is not covered by theMercedes-Benz warranty.
Briefly depressing the accelerator pedal ondownhill gradients while the manual drive pro-gramMis temporarily activated: the automatictransmission may switch to the last active auto-matic drive programEorS. The automatic trans-mission may shift to a higher gear. This canreduce the engine's braking effect.
Heavy and light loads
GWARNING
If you rest your foot on the brake pedal while
driving, the braking system can overheat. This
increases the stopping distance and can even
cause the braking system to fail. There is a
risk of an accident.
Never use the brake pedal as a footrest. Never
depress the brake pedal and the accelerator
pedal at the same time.
!Depressing the brake pedal constantlyresults in excessive and premature wear tothe brake pads.
If the brakes have been subjected to a heavyload, do not stop the vehicle immediately. Driveon for a short while. This allows the airflow tocool the brakes more quickly.
Wet roads
If you have driven for a long time in heavy rainwithout braking, there may be a delayed reac-tion from the brakes when braking for the firsttime. This may also occur after the vehicle hasbeen washed or driven through deep water.
You have to depress the brake pedal morefirmly. Maintain a greater distance from thevehicle in front.
After driving on a wet road or having the vehiclewashed, brake firmly while paying attention tothe traffic conditions. This will warm up thebrake discs, thereby drying them more quicklyand protecting them against corrosion.
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 brakepads. This can result in a significantly longerbraking distance.
RIn order to prevent any salt build-up, apply thebrakes occasionally while paying attention tothe traffic conditions.
RCarefully depress the brake pedal and thebeginning and end of a journey.
RMaintain a greater distance to the vehicleahead.
Servicing the brakes
!The brake fluid level may be too low, if:
Rif the red brake warning lamp lights up inthe instrument cluster and
Ryou hear a warning tone while the engine isrunning
Observe additional warning messages in themultifunction display.
The brake fluid level may be too low due tobrake pad wear or leaking brake lines.
Have the brake system checked immediately.Consult a qualified specialist workshop toarrange this.
!A function or performance test should onlybe carried out on a 2-axle dynamometer. Ifyou wish to operate the vehicle on such adynamometer, please consult a qualified spe-cialist workshop in advance. You could oth-erwise damage the drive train or the brakesystem.
!As the ESP®system operates automatically,the engine and the ignition must be switchedoff (the SmartKey must be in position

The speed indicated in the speedometer maydiffer slightly from the speed stored.
Important safety notes
If you fail to adapt your driving style, cruise con-trol can neither reduce the risk of an accidentnor override the laws of physics. Cruise controlcannot take into account the road, traffic andweather conditions. Cruise control is only anaid. You are responsible for the distance to thevehicle in front, for vehicle speed, for braking ingood time and for staying in your lane.
Do not use cruise control:
Rin road and traffic conditions which do notallow you to maintain a constant speed, e.g. inheavy traffic or on winding roads
Ron slippery road surfaces. Braking or accel-erating could cause the drive wheels to losetraction and the vehicle could then skid
Rin poor visibility, e.g. due to fog, heavy rain orsnow
If there is a change of drivers, advise the newdriver of the speed stored.
Cruise control lever
CActivates or increases speed
DActivates or reduces speed

iIf you do not depress the accelerator pedalwithin a few seconds, RACE START is can-celed. The multifunction display shows theRACE START CanceledRACE START Canceledmessage.
XFully depress the accelerator pedal.The engine speed is increased.
TheRACERACESTARTSTARTReleaseReleasebrakebraketotostartstartmessage appears in the multifunction display.
iIf you do not release the brake pedal withina short time, RACE START will be canceled.The multifunction display shows theRACERACESTART CanceledSTART Canceledmessage.
XTake your foot off the brake, but keep theaccelerator pedal depressed.The vehicle pulls away at maximum acceler-ation.
TheRACERACESTARTSTARTActiveActivemessage appears inthe multifunction display.
RACE START is deactivated when the vehiclereaches a speed of approximately 50 km/h.
RACE START is deactivated immediately if yourelease the accelerator pedal during RACESTART or if any of the activation conditions areno longer fulfilled. TheRACE START Not Pos‐RACE START Not Pos‐sible See Operator's Manualsible See Operator's ManualorRACERACESTART CanceledSTART Canceledmessage appears in the mul-tifunction display.
iIf RACE START is used repeatedly within ashort period of time, it is only available againafter the vehicle has been driven a certaindistance.
AMG adaptive sport suspension sys-
tem
General notes
The electronically controlled damping systemworks continuously. This improves drivingsafety and ride comfort.
The damping is tuned individually to each wheeland depends on:
Ryour driving style, e.g. sporty
Rthe road surface condition, e.g. bumps
Ryour individual selection ofSportorComfort
The suspension setting is adjusted using thecorresponding button in the center console.
iThe mode can also be set using the AMGDYNAMIC SELECT controller (Ypage 130).
Each time you start the engine with the Smart-Key or the Start/Stop button,Comfortmode isactivated. For further information about startingthe engine, see (Ypage 123).
Sport mode
The firmer setting of the suspension tuning inSportmode ensures even better contact withthe road. Select this mode when employing asporty driving style, e.g. on winding countryroads.
XPress buttonC.Indicator lampDlights up. You have selectedSportmode.
TheAMG Suspension System SPORTAMG Suspension System SPORTmes-sage appears in the multifunction display.
Comfort mode
InComfortmode, the driving characteristics ofyour vehicle are more comfortable. Select thismode if you favor a more comfortable drivingstyle, but also when driving fast on straightroads, e.g. highways.
XPress buttonCagain so that indicatorlampDgoes out.You have selectedComfortmode.
TheAMGAMGSuspensionSuspensionSystemSystemCOMFORTCOMFORTmes-sage appears in the multifunction display.
4MATIC
!Never tow the vehicle with one axle raised.This may damage the differential. Damage ofthis sort is not covered by the Mercedes-BenzLimited Warranty. All wheels must remaineither on the ground or be fully raised.Observe the instructions for towing the vehi-
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Parking Assist PARKTRONIC is activated auto-matically when you:
Rswitch on the ignition
Rshift the transmission to position[,^or\\
Parking Assist PARKTRONIC is deactivated atspeeds above 11 mph (18 km/h). It is reactiva-ted at lower speeds.
Range of the sensors
General notes
Parking Assist PARKTRONIC does not take intoaccount obstacles located:
Rbelow the detection range, such as persons,animals or objects
Rabove the detection range, e.g. overhangingloads, tail sections or loading ramps of trucks
CSensors in the front bumper, left-hand side(example)
The sensors must be free from dirt, ice or slush.They can otherwise not function correctly. Cleanthe sensors regularly, taking care not to scratchor damage them (Ypage 269).
Range
CDetection range of front sensors
DDetection range of rear sensors
Front sensors
CenterApprox. 40 in (approx.100 cm)
CornersApprox. 24 in (approx.60 cm)
Rear sensors
CenterApprox. 48 in (approx.120 cm)
CornersApprox. 32 in (approx.80 cm)
Minimum distance
CenterApprox. 8 in (approx. 20 cm)
CornersApprox. 6 in (approx. 15 cm)
If an obstacle is detected within this range, therelevant warning displays light up and a warningtone sounds. If the distance falls below the min-imum, the distance may no longer be shown.
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Problems with Parking Assist PARKTRONIC
ProblemPossible causes/consequences andPPSolutions
Only the red segments inthe Parking AssistPARKTRONIC warningdisplays are lit. You alsohear a warning tone forapproximately two sec-onds.
Parking AssistPARKTRONIC is thendeactivated and the indi-cator lamp on thePARKTRONIC buttonlights up.
Parking Assist PARKTRONIC has malfunctioned and has been deacti-vated.
XIf problems persist, have Parking Assist PARKTRONIC checked at aqualified specialist workshop.
Only the red segments inthe Parking AssistPARKTRONIC warningdisplays are lit. ParkingAssist PARKTRONIC isthen deactivated.
The Parking Assist PARKTRONIC sensors are dirty or there is inter-ference.
XClean the Parking Assist PARKTRONIC sensors (Ypage 269).
XSwitch the ignition back on.
The problem may be caused by an external source of radio or ultra-sound waves.
XCheck to see if Parking Assist PARKTRONIC works at a differentlocation.
Active Parking Assist
General notes
Active Parking Assist is an electronic parking aidwith ultrasound. It measures the road on bothsides of the vehicle. A parking symbol indicatesa suitable parking space. Active steering inter-vention and brake application can assist youduring parking and when exiting a parkingspace. You can also still use Parking AssistPARKTRONIC (Ypage 162).
Important safety notes
Active Parking Assist is merely an aid. It is not areplacement for your attention to your immedi-ate surroundings. You are always responsiblefor safe maneuvering, parking and exiting aparking space. Make sure that there are no per-sons, animals or objects in the maneuveringarea when you are maneuvering or parking.
When Parking Assist PARKTRONIC is deactiva-ted, Active Parking Assist is also unavailable.
GWARNING
While parking or pulling out of a parking
space, the vehicle swings out and can drive
onto areas of the oncoming lane. This could
cause you to collide with other road users or
objects. There is a risk of an accident.
Pay attention to other road users or objects.
Stop the vehicle if necessary or cancel the
Active Parking Assist parking procedure.
!If they cannot be avoided, drive over obsta-cles such as curbs slowly and at an obtuseangle. Otherwise, you may damage thewheels or tires.
Active Parking Assist may possibly indicateparking spaces which are not suitable for park-ing, for example:
Rwhere parking or stopping is prohibited
Rin front of driveways or entrances and exits
Ron unsuitable surfaces
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