2019 MERCEDES-BENZ CLA Owners Manual

To ensure that the vehicle is secured againstrolling away unintentionally:
Rthe electric parking brake must be applied.
Rthe transmission must be in position]andthe transmission position display must show]in the multifunction display.
Rthe SmartKey must be removed from the igni-tion lock.
Ron uphill or downhill gradients, the frontwheels must be turned towards the curb.
Switching off the engine
Important safety notes
GWARNING
The automatic transmission switches to neu-
tral positionNwhen 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 positionP. Prevent the parked vehi-
cle from rolling away by applying the parking
brake.
Automatic transmission
XApply the electric parking brake.
XAll vehicles (except Mercedes-AMG vehi-cles):shift the transmission to position].
XMercedes-AMG vehicles:press buttonC.
XWith the SmartKey :turn the SmartKey topositionZin the ignition lock and remove it.The immobilizer is activated.
XWith the Start/Stop button:press theStart/Stop button (Ypage 123).The engine stops and all the indicator lamps inthe instrument cluster go out.
If the driver's door is closed, this is the sameas key positionG. If the driver's door is open,this is the same as key positionZ, i.e. theSmartKey having been removed.
If you switch the engine off with the transmis-sion in position^or[, the automatic trans-mission shifts to\\automatically.
With the SmartKey:if you then open the driv-er's door or the front-passenger door or removethe SmartKey from the ignition, the automatictransmission shifts to]automatically.
With the Start/Stop button:if you then openthe driver's door or the front-passenger door,the automatic transmission shifts to]auto-matically.
If you want the automatic transmission toremain in neutral\\, e.g. when having the vehi-cle cleaned in an automatic car wash with atowing system:
XVehicles with the Start-Stop button:remove the Start-Stop button from the igni-tion lock.
XInsert the SmartKey into the ignition lock.
XAll vehicles:switch the ignition on.
XDepress the brake pedal and keep itdepressed.
XEngage neutral\\.
XRelease the brake pedal.
XRelease the electric parking brake.
XSwitch off the ignition and leave the SmartKeyin the ignition lock.
Electric parking brake
General notes
GWARNING
If children are left unsupervised in the vehicle,
they could:
Roperate the vehicle's equipment
Parking143
Driving and parking
Z

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.
144Parking
Driving an d parking

Releasing automatically
Your vehicle's electric parking brake is auto-matically released if all of the following condi-tions are met:
RThe engine is running.
RThe transmission is in position[or^andyou depress the accelerator pedal or shiftfrom position]to[or^.
RThe seat belt has been fastened.
If the transmission is in position^, the trunk lidmust be closed.
If your seat belt is not fastened, the followingconditions must be fulfilled to automaticallyrelease the electric parking brake:
RThe driver's door is closed.
RYou are shifting from transmission position]or have previously driven at speedsgreater than 2 mph (3 km/h).
Ensure that you do not depress the acceleratorpedal unintentionally. Otherwise, the parkingbrake will be released and the vehicle will startto move.
Emergency braking
The vehicle can also be braked during an emer-gency by using the electric parking brake.
XWhile driving, push handleCof the electricparking brake (Ypage 144).The vehicle is braked as long as you keephandleCof the electric parking brakepressed. The longer the electric parking brakehandleCis depressed, the greater the brak-ing force.
During braking:
Ra warning tone sounds
RtheRelease Parking BrakeRelease Parking Brakemessageappears
Rthe redI(USA only) or$(Canadaonly) indicator lamp in the instrument clusterflashes
When the vehicle has been braked to a stand-still, the electric parking brake is applied.
Parking the vehicle for a long period
If you leave the vehicle parked for longer thanfour weeks, the battery may be damaged byexhaustive discharging.
If you leave the vehicle parked for longer than sixweeks, the vehicle may suffer damage as aresult of lack of use.
XVisit a qualified specialist workshop and seekadvice.
iYou can obtain information about tricklechargers from a qualified specialist work-shop.
Driving tips
General notes
Important safety notes
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 you operate mobile communication equip-
ment when driving, you may be distracted
from the traffic situation. You could also lose
control of the vehicle. There is a risk of an
accident.
Only operate this equipment when the vehicle
is stationary.
Observe the legal requirements for the countryin which you are driving. Some jurisdictions pro-hibit the driver from using a mobile phone whiledriving a vehicle.
If you make a call while driving, always usehands-free mode. Only operate the telephonewhen the traffic situation permits. If you areunsure, pull over to a safe location and stopbefore operating the telephone.
Bear in mind that at a speed of only 30 mph(approximately 50 km/h), the vehicle covers adistance of 44 ft (approximately 14m)per sec-ond.
Driving tips145
Driving and parking
Z

Drive sensibly – save fuel
Observe the following tips to save fuel:
RThe tires should always be inflated to the rec-ommended tire pressure.
RRemove unnecessary loads.
RRemove roof racks when they are not needed.
RWarm up the engine at low engine speeds.
RAvoid frequent acceleration or braking.
RHave all maintenance work carried out asindicated by the service intervals in the Main-tenance Booklet or by the service interval dis-play.
Fuel consumption also increases when driving incold weather, in stop-start traffic and in hilly ter-rain.
Drinking and driving
GWARNING
Drinking and driving and/or taking drugs and
driving are very dangerous combinations.
Even a small amount of alcohol or drugs can
affect your reflexes, perceptions and judg-
ment.
The possibility of a serious or even fatal acci-
dent is greatly increased when you drink or
take drugs and drive.
Do not drink or take drugs and drive or allow
anyone to drive who has been drinking or tak-
ing drugs.
Emission control
GDANGER
Combustion engines emit poisonous exhaust
gases such as carbon monoxide. Inhaling
these exhaust gases is hazardous to health
and can result in poisoning. There is a risk of
fatal injury. Therefore, never leave the engine
running in an enclosed space without ade-
quate ventilation.
Certain engine systems are designed to keepthe level of poisonous components in exhaustfumes within legal limits.
These systems only work at peak efficiency ifthey are serviced exactly in accordance with themanufacturer's specifications. Always have
work on the engine carried out at a qualifiedspecialist workshop. Mercedes-Benz recom-mends that you use an authorized Mercedes-Benz Center for this purpose. In particular, workrelevant to safety or on safety-related systemsmust be carried out at a qualified specialistworkshop.
The engine settings must not be changed underany circumstances. Furthermore, all specificservice work must be carried out at regularintervals and in accordance with the Mercedes-Benz service requirements. Details can be foundin the Maintenance Booklet.
ECO display
The ECO display shows you how economicalyour driving style is. The ECO display assists youin achieving the most economical driving stylefor the selected settings and prevailing condi-tions. Your driving style can significantly influ-ence the vehicle's consumption.
CAcceleration
DCoasting

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

If the brake system has only been subject tomoderate loads, you should test the functional-ity of your brakes at regular intervals.
You can find a description of Brake Assist (BAS)on (Ypage 61).
Mercedes-Benz recommends that you only havebrake pads/linings installed on your vehiclewhich have been approved for Mercedes-Benzvehicles or which correspond to an equivalentquality standard. Brake pads/linings which havenot been approved for Mercedes-Benz vehiclesor which are not of an equivalent quality couldaffect your vehicle's operating safety.
Mercedes-Benz recommends that you only usebrake fluid that has been specially approved foryour vehicle by Mercedes-Benz, or which corre-sponds to an equivalent quality standard. Brakefluid which has not been approved forMercedes-Benz vehicles or which is not of anequivalent quality could affect your vehicle'soperating safety.
Checking brake lining thickness
You can measure the break pad/lining thick-ness using a test gage. Color-coding (green orred) on the test gage allows you to determinewhether the brake pad/lining thickness is stillsufficient. The test gage is in the vehicle docu-ment wallet in the glove box.
Front wheel
Rear wheel
XBring the vehicle and wheels into a suitableposition so that you can attach test gage

For this reason, in the event of heavy rain or inconditions in which hydroplaning may occur,you must drive in the following manner:
Rlower your speed
Ravoid ruts
Ravoid sudden steering movements
Rbrake carefully
Driving on flooded roads
!Do not drive through flooded areas. Checkthe depth of any water before driving throughit. Drive slowly through standing water. Oth-erwise, water could enter the vehicle interioror engine compartment. It can then damagethe engine's or automatic transmission'selectronic components. It can also be suckedin by the engine's air intake connection andcause engine damage.
Winter driving
GWARNING
If you shift down on a slippery road surface in
an attempt to increase the engine's braking
effect, the drive wheels could lose their grip.
There is an increased danger of skidding and
accidents.
Do not shift down for additional engine brak-
ing on a slippery road surface.
GDANGER
If the exhaust pipe is blocked or adequate
ventilation is not possible, poisonous gases
such as carbon monoxide (CO) may enter the
vehicle. This is the case, e.g. if the vehicle
becomes trapped in snow. There is a risk of
fatal injury.
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 your vehicle winter-proofed at a qualifiedspecialist workshop at the onset of winter.
Drive particularly carefully on slippery road sur-faces. Avoid sudden acceleration, steering andbraking maneuvers. Do not use cruise control orActive Distance Assist DISTRONIC.
If the vehicle threatens to skid or cannot bestopped when moving at low speed:
XShift the transmission to position\\.
XTry to bring the vehicle under control usingcorrective steering.
The outside temperature indicator is notdesigned to serve as an ice-warning device andis therefore unsuitable for that purpose.Changes in the outside temperature are dis-played after a short delay.
Indicated temperatures just above the freezingpoint do not guarantee that the road surface isfree of ice. The road may still be icy, especially inwooded areas or on bridges.
You should pay special attention to road condi-tions when temperatures are around freezingpoint.
For more information on driving with snowchains, see (Ypage 293).
For more information on driving with summertires, see (Ypage 292).
Observe the notes in the "Winter operation" sec-tion (Ypage 292).
Driving systems
Cruise control
General notes
Cruise control maintains a constant road speedfor you. It brakes automatically in order to avoidexceeding the set speed. On long and steepdownhill gradients, especially if the vehicle isladen, you must select a low gear in good time.You need to shift manually using the steeringwheel paddle shifters beforehand. By doing so,you will make use of the braking effect of theengine. This relieves the load on the brake sys-tem and prevents the brakes from overheatingand wearing too quickly.
When the engine is running, you can use thecruise control lever to limit the speed to anyspeed between 20 mph (30 km/h) and the tech-nically permitted maximum speed of the vehicle.
Use cruise control if road and traffic conditionsmake it appropriate to maintain a steady speedfor a prolonged period.
150Driving systems
Driving and parking