warning light MERCEDES-BENZ CLA 2019 Workshop Manual

General notes
The multimedia system section in this Opera-tor's Manual describes the basic principles foroperation. More information can be found in theDigital Operator's Manual.
Important safety notes
GWARNING
If you operate information systems and com-
munication equipment integrated in the vehi-
cle when driving, you may be distracted from
the traffic situation. You could also lose con-
trol of the vehicle. There is a risk of an acci-
dent.
Only operate this equipment when the traffic
situation permits. If you are not sure that this
is possible, park the vehicle paying attention
to traffic conditions and operate the equip-
ment when the vehicle is stationary.
You must observe the legal requirements for thecountry in which you are currently driving whenoperating the multimedia system.
The multimedia system calculates the route tothe destination without taking the following intoaccount, for example:
Rtraffic lights
Rstop and yield signs
Rparking or stopping restrictions
Rroad narrowing
Rother road and traffic rules and regulations
The multimedia system may give incorrect nav-igation recommendations if the actual street/traffic situation does not correspond with thedigital map's data.
For example:
Ra diverted route
Rthe road layout or the direction of a one-waystreet has been changed
For this reason, you must always observe roadand traffic rules and regulations during yourjourney. Road and traffic rules and regulationsalways have priority over multimedia systemdriving recommendations.
Navigation announcements are intended todirect you while driving without diverting yourattention from the road and driving.
Please always use this feature instead of con-sulting the map display for directions. Lookingat the icons or map display can distract you fromtraffic conditions and driving, and increase therisk of an accident.
This equipment complies with FCC radiationexposure limits set forth for uncontrolled equip-ment and meets the FCC radio frequency (RF)Exposure Guidelines in Supplement C to OET65.
This equipment has very low levels of RF energythat is deemed to comply without maximumpermissive exposure evaluation (MPE). How-ever, it is recommended to install it at a distanceof at least 8 inches (approx. 20 cm) between theradiation source and a person's body (notincluding limbs such as hands, wrists, feet andlegs).
GWARNING
Modifications to electronic components, their
software as well as wiring can impair their
function and/or the function of other net-
worked components. In particular, systems
relevant to safety could also be affected. As a
result, these may no longer function as inten-
ded and/or jeopardize the operating safety of
the vehicle. There is an increased risk of an
accident and injury.
Never tamper with the wiring as well as elec-
tronic components or their software. You
should have all work to electrical and elec-
tronic equipment carried out at a qualified
specialist workshop.
Function restrictions
For safety reasons, some functions are restric-ted or unavailable while the vehicle is in motion.You will notice this, for example, because eitheryou will not be able to select certain menu itemsor a message will appear to this effect.
Function restrictions231
Multimedia system
Z

of the upper section of cup holderCfacesforwards.
XPress the cup holder downwards until itengages on the right and left-hand sides.
Cup holder in the rear seat armrest
!Do not sit on or support your body weight onthe rear seat armrest when it is folded down,as you could otherwise damage it.
!Close the cup holder before folding the rearseat armrest up. Otherwise, the cup holdercould be damaged.
XFold down the rear seat armrest.
XTo open:press the front of cup holderCorD.Cup holderCorDextends automatically.
XTo close:slide cup holderCorDback untilit engages.
Sun visors
Overview
GWARNING
If the mirror cover of the vanity mirror is folded
up when the vehicle is in motion, you could be
blinded by incident light. There is a risk of an
accident.
Always keep the mirror cover folded down
while driving.
CMirror light
DBracket

Currently inactive areas can be activated by textmessage.
Triggering the vehicle alarm
With this function, you can trigger the vehicle'spanic alarm via text message. An alarm soundsand the exterior lighting flashes. Depending onthe setting, the panic alarm lasts five or ten sec-onds. Afterwards, the alarm switches off.
Garage door opener
General notes
The HomeLink®garage door opener integratedin the rear-view mirror allows you to operate upto three different door and gate systems.
Use the integrated garage door opener only ongarage doors that:
Rhave safety stop and reverse features and
Rmeet current U.S. federal safety standards
Once programed, the integrated garage dooropener in the rear-view mirror will assume thefunction of the garage door system's remotecontrol. Please also read the operating instruc-tions for the garage door system.
When programming a garage door opener, parkthe vehicle outside the garage. Do not leave theengine running while programming.
Certain garage door drives are incompatiblewith the integrated garage door opener. If youhave difficulty programing the integrated garagedoor opener, contact a Mercedes-Benz ServiceCenter.
Alternatively, you can call the following tele-phone assistance services:
RUSA:Mercedes-Benz Customer AssistanceCenter at 1-800-FOR-MERCedes
RCanada:Customer Service at1-800-387-0100
RHomeLink®hotline 1-800-355-3515 (free ofcharge)
More information on HomeLink®and/or com-patible products is also available online athttp://www.homelink.com.
Notes on the declaration of conformity(Ypage 27).
USA: FCC ID: CB2HMIHL4
Canada: IC: 279B-HMIHL4
Important safety notes
GWARNING
When you operate or program the door with
the integrated garage door opener, persons in
the range of movement of the door may
become trapped or be struck by the door.
There is a risk of injury.
When using the integrated garage door
opener, always make sure that nobody is
within the range of movement of the door.
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.
Programming
Programming the buttons
Pay attention to the "Important safety notes"(Ypage 255).
Garage door remote control

Cleaning wiper blades
GWARNING
You could become trapped by the windshield
wipers if they start moving while cleaning the
windshield or wiper blades. There is a risk of
injury.
Always switch off the windshield wipers and
the ignition before cleaning the windshield or
wiper blades.
!Only fold the windshield wipers away fromthe windshield when vertical. Otherwise, youwill damage the hood.
!Do not pull the wiper blade. Otherwise, thewiper blade could be damaged.
!Do not clean wiper blades too often and donot rub them too hard. Otherwise, the graph-ite coating could be damaged. This couldcause wiper noise.
!Hold the wiper arm securely when foldingback. The windshield could be damaged if thewiper arm smacks against it suddenly.
XFold the windshield wiper arms away from thewindshield.
XCarefully clean the wiper blades with a dampcloth.
XFold the windshield wiper arms back againbefore switching on the ignition.
Cleaning the exterior lighting
!Only use cleaning agents or cleaning clothswhich are suitable for plastic light lenses.Unsuitable cleaning agents or cleaning clothscould scratch or damage the plastic light len-ses.
XClean the plastic lenses of the exterior lightswith a wet sponge and a mild cleaning agent,e.g. Mercedes-Benz car shampoo or cleaningcloths.
Cleaning the mirror turn signals
!Only use cleaning agents or cleaning clothsthat are suitable for plastic lenses. Unsuitablecleaning agents or cleaning cloths couldscratch or damage the plastic lenses of themirror turn signals.
XClean the plastic lenses of the mirror turn sig-nals in the exterior mirror housing using a wetsponge and mild cleaning agent, e.g.Mercedes-Benz car shampoo or cleaningcloths.
Cleaning the sensors
!If you clean the sensors with a powerwasher, make sure that you keep a distanceof at least 11.8 in(30 cm) between the vehicleand the power washer nozzle. Informationabout the correct distance is available fromthe equipment manufacturer.
XClean sensorsCof the driving systems withwater, car shampoo and a soft cloth.
Cleaning the rear view camera
!Do not clean the camera lens and the areaaround the rear view camera with a powerwasher.
Care269
Maintenance and care
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XMake sure that the vehicle is at a standstilland the SmartKey is in positionHin the igni-tion lock.
XOpen the camera cover for cleaning via themultimedia system (see Digital Operator'sManual).
XTo clean the rear view camera:use clearwater and a soft cloth to clean cameralensC.
Cleaning the exhaust pipes
GWARNING
The exhaust tail pipe and tail pipe trim can
become very hot. If you come into contact
with these parts of the vehicle, you could burn
yourself. There is a risk of injury.
Always be particularly careful around the
exhaust tail pipe and the tail pipe trim. Allow
these components to cool down before touch-
ing them.
!Do not clean the exhaust pipe with acid-based cleaning agents, such as bathroomcleaner or wheel cleaner.
!Mercedes-AMG vehicles with black exhaustpipes: the black-chrome tailpipe finishersshould not be polished with a chrome polish.They will otherwise lose their black sheen. Foroptimal care, the faceplates should be rubbedwith a lightly oiled cloth after every car wash.Commercially available engine and care oilsare suitable for this.
For heavier soiling, you can apply a fine paint-work polish with a microfiber cloth. Removethe excess polish residue after polishing.
Impurities combined with the effects of road gritand corrosive environmental factors may causeflash rust to form on the surface. You canrestore the original shine of the exhaust pipe bycleaning it regularly, especially in winter andafter washing.
XClean the exhaust pipe with a care producttested and approved by Mercedes-Benz.
Interior care
Cleaning the display
!For cleaning, do not use any of the following:
Ralcohol-based thinner or gasoline
Rabrasive cleaning agents
Rcommercially-available household cleaningagents
These may damage the display surface. Donot put pressure on the display surface whencleaning. This could lead to irreparable dam-age to the display.
XBefore cleaning the display, make sure that itis switched off and has cooled down.
XClean the display surface using a commer-cially available microfiber cloth and TFT/LCDdisplay cleaner.
XDry the display surface using a dry microfibercloth.
Cleaning the plastic trim
GWARNING
Care products and cleaning agents containing
solvents cause surfaces in the cockpit to
become porous. As a result, plastic parts may
come loose in the event of air bag deploy-
ment. There is a risk of injury.
Do not use any care products and cleaning
agents to clean the cockpit.
!Never attach the following to plastic surfa-ces:
Rstickers
Rfilms
Rperfume oil container or similar
You could otherwise damage the plastic.
!Do not allow cosmetics, insect repellent orsunscreen to come into contact with the plas-tic trim. This maintains the high-quality look ofthe surfaces.
XWipe the plastic trim with a damp, lint-freecloth, e.g. a microfiber cloth.
XHeavy soiling:use care and cleaning prod-ucts recommended and approved byMercedes-Benz.The surface may change color temporarily.Wait until the surface is dry again.
270Care
Maintenance and care

Cleaning the steering wheel and gear or
selector lever
XThoroughly wipe with a damp cloth or useleather care agents that have been recom-mended and approved by Mercedes-Benz.
Cleaning genuine wood and trim ele-
ments
!Do not use solvent-based cleaning agentssuch as tar remover, wheel cleaners, polishesor waxes. There is otherwise a risk of damag-ing the surface.
!Do not use chrome polish on trim pieces.The trim pieces have a chrome look but aremostly made of anodized aluminum and canlose their shine if chrome polish is used. Usea damp, lint-free cloth instead when cleaningthe trim pieces.
If the chrome-plated trim pieces are verydirty, you can use a chrome polish. If you areunsure as to whether the trim pieces arechrome-plated or not, consult an authorizedMercedes-Benz Center.
XWipe the wooden trim and trim pieces with adamp, lint-free cloth, e.g. a microfiber cloth.
XHeavy soiling:use care and cleaning prod-ucts recommended and approved byMercedes-Benz.
Cleaning the seat covers
General notes
!Do not use a microfiber cloth to clean coversmade out of real leather, artificial leather orDINAMICA. If used often, these can damagethe cover.
Note that regular care is essential to ensure thatthe appearance and comfort of the covers isretained over time.
Genuine leather seat covers
!To retain the natural appearance of theleather, observe the following cleaninginstructions:
RClean genuine leather covers carefully witha damp cloth and then wipe the coversdown with a dry cloth.
RMake sure that the leather does notbecome soaked. It may otherwise becomerough and cracked.
ROnly use leather care agents that havebeen tested and approved by Mercedes-Benz. You can obtain these from a qualifiedspecialist workshop.
Leather is a natural product.
It exhibits natural surface characteristics, forexample:
Rdifferences in the texture
Rmarks caused by growth and injury
Rslight nuances of color
These are characteristics of leather and notmaterial defects.
Seat covers of other materials
!Observe the following when cleaning:
Rclean artificial leather covers with a clothmoistened with a solution containing 1%detergent (e.g. dish washing liquid).
Rclean cloth covers with a microfiber clothmoistened with a solution containing 1%detergent (e.g. dish washing liquid). Rubcarefully and always wipe entire seat sec-tions to avoid leaving visible lines. Leavethe seat to dry afterwards. Cleaning resultsdepend on the type of dirt and how long ithas been there.
Rclean DINAMICA covers with a damp cloth.Make sure that you wipe entire seat sec-tions to avoid leaving visible lines.
Cleaning the seat belts
GWARNING
Seat belts can become severely weakened if
bleached or dyed. This could cause the seat
belts to tear or fail, for instance, in the event of
an accident. This poses an increased risk of
injury or fatal injury.
Never bleach or dye the seat belts.
Care271
Maintenance and care
Z

XHave the tire sealant bottle and the filler hosereplaced as soon as possible at a qualifiedspecialist workshop.
XHave the tire sealant bottle replaced everyfour years at a qualified specialist workshop.
Battery (vehicle)
Important safety notes
Special tools and expert knowledge are requiredwhen working on the battery, e.g. removal andinstallation. You should therefore have all workinvolving the battery carried out at a qualifiedspecialist workshop.
GWARNING
Work carried out incorrectly on the battery
can lead, for example, to a short circuit and
thus damage the vehicle electronics. This can
lead to function restrictions applying to
safety-relevant systems, e.g. the lighting sys-
tem, the ABS (anti-lock braking system) or the
ESP®(Electronic Stability Program). The oper-
ating safety of your vehicle may be restricted.
You could lose control of the vehicle, for
example:
Rwhen braking
Rin the event of abrupt steering maneuvers
and/or when the vehicle's speed is not
adapted to the road conditions
There is a risk of an accident.
In the event of a short circuit or a similar inci-
dent, contact a qualified specialist workshop
immediately. Do not drive any further. You
should have all work involving the battery car-
ried out at a qualified specialist workshop.
For further information about ABS and ESP®,see (Ypage 61) and (Ypage 64).
GWARNING
Electrostatic build-up can lead to the creation
of sparks, which could ignite the highly explo-
sive gases of a battery. There is a risk of an
explosion.
Before handling the battery, touch the vehicle
body to remove any existing electrostatic
build-up.
The highly flammable gas mixture forms whencharging the battery as well as when jump-start-ing.
Always make sure that neither you nor the bat-tery is electrostatically charged. A build-up ofelectrostatic charge can be caused, for exam-ple:
Rby wearing clothing made from syntheticfibers
Rdue to friction between clothing and seats
Rif you push or pull the battery across the car-pet or other synthetic materials
Rif you rub the battery with a cloth
GWARNING
During the charging process, a battery produ-
ces hydrogen gas. If a short circuit occurs or
sparks are created, the hydrogen gas can
ignite. There is a risk of an explosion.
RMake sure that the positive terminal of a
connected battery does not come into con-
tact with vehicle parts.
RNever place metal objects or tools on a bat-
tery.
RIt is important that you observe the descri-
bed order of the battery terminals when
connecting and disconnecting a battery.
RWhen jump-starting, make sure that the
battery poles with identical polarity are
connected.
RIt is particularly important to observe the
described order when connecting and dis-
connecting the jumper cables.
RNever connect or disconnect the battery
terminals while the engine is running.
GWARNING
Battery acid is caustic. There is a risk of injury.
Avoid contact with skin, eyes or clothing. Do
not inhale any battery gases. Do not lean over
the battery. Keep children away from batter-
ies. Wash away battery acid immediately with
Battery (vehicle)279
Breakdown assistance
Z

Only replace a battery with a battery that hasbeen recommended by Mercedes-Benz.
Remove the SmartKey if you park the vehicleand do not require any electrical consumers.The vehicle will then use very little energy, thusconserving battery power.
If the power supply has been interrupted, e.g. ifyou reconnect the battery, you will have to:
Rset the clock using the multimedia system(see the Digital Operator's Manual)
Rreset the function for folding the exterior mir-rors in/out automatically, by folding the mir-rors out once (Ypage 98)
Charging the battery
GWARNING
During charging and jump-starting, explosive
gases can escape from the battery. There is a
risk of an explosion.
Particularly avoid fire, open flames, creating
sparks and smoking. Ensure there is sufficient
ventilation while charging and jump-starting.
Do not lean over a battery.
GWARNING
Battery acid is caustic. There is a risk of injury.
Avoid contact with skin, eyes or clothing. Do
not inhale any battery gases. Do not lean over
the battery. Keep children away from batter-
ies. Wash away battery acid immediately with
plenty of clean water and seek medical atten-
tion.
GWARNING
A discharged battery can freeze at tempera-
tures below freezing point. When jump-start-
ing the vehicle or charging the battery, gases
can escape from the battery. There is a risk of
an explosion.
Allow the frozen battery to thaw out before
charging it or jump-starting.
!Only use battery chargers with a maximumcharging voltage of 14.8 V.
!Only charge the battery using the jump-starting connection point.
The jump-starting connection point is in theengine compartment (Ypage 282).
XOpen the hood.
XConnect the battery charger to the positiveterminal and ground point in the same orderas when connecting the donor battery in thejump-starting procedure (Ypage 282).
If the indicator/warning lamps do not light up inthe instrument cluster at low temperatures, it isvery likely that the discharged battery has fro-zen. In this case you may neither jump-start thevehicle nor charge the battery. The service life ofa thawed-out battery may be shorter. The start-ing characteristics can be impaired, particularlyat low temperatures. Have the thawed-out bat-tery checked at a qualified specialist workshop.
Only charge the installed battery with a batterycharger which has been tested and approved byMercedes-Benz. A battery charger unit speciallyadapted for Mercedes-Benz vehicles and testedand approved by Mercedes-Benz is available asan accessory. It permits the charging of the bat-tery in its installed position. Contact an author-ized Mercedes-Benz Center for further informa-tion and availability. Read the battery charger'soperating instructions before charging the bat-tery.
Replacing the 12 V battery
Observe the notes on the 12 V battery(Ypage 279).
Mercedes-Benz recommends that you have the12 V battery replaced at a qualified specialistworkshop, e.g. at an authorized Mercedes-BenzCenter.
If you want to replace the battery yourself,observe the following notes:
RAlways replace a defective battery with a bat-tery which meets the specific requirements ofthe vehicle.
The vehicle is equipped with a battery usingAGM (absorbent glass mat) technology or abattery using EFB (enhanced flooded battery)technology. Full vehicle functionality is guar-anteed only with an AGM or EFB battery. Ifreplacement is necessary, always use the bat-tery technology originally installed. Switchingbetween the battery technologies is not per-mitted. For safety reasons, Mercedes-Benzrecommends that you only use batteries
Battery (vehicle)281
Breakdown assistance
Z

If the indicator/warning lamps do not light up in the instrument cluster at low temperatures, it is verylikely that the discharged battery has frozen. In this case you may neither jump-start the vehicle norcharge the battery. Let the battery thaw first. The service life of a thawed-out battery may be shorter.The starting characteristics can be impaired, particularly at low temperatures. Have the thawed-outbattery checked at a qualified specialist workshop.
Do not start the vehicle using a rapid charging device. If your vehicle's battery is discharged, theengine can be jump-started from another vehicle or from a second battery using jumper cables.Observe the following points:
RThe battery is not accessible in all vehicles. If the other vehicle's battery is not accessible, jump-start the vehicle using a second battery or a jump-starting device.
RYou may only jump-start the vehicle when the engine and exhaust system are cold.
RDo not start the engine if the battery is frozen. Let the battery thaw first.
ROnly jump-start from batteries with a 12 V voltage rating.
ROnly use jumper cables that are not damaged and have a sufficient cross-section and insulatedterminal clamps.
RMake sure that the two vehicles do not touch.
Make sure that:
RThe jumper cables are not damaged.
RNon-insulated parts of the terminal clamps do not come into contact with other metal parts whilethe jumper cables are connected to the battery.
RThe jumper cables cannot come into contact with parts that can move when the engine is running,such as the V-belt pulley or the fan.
XSecure the vehicle by applying the electric parking brake.
XShift the transmission to position].
XTurn the SmartKey to positionZin the ignition lock and remove it.
XSwitch off all electrical consumers, e.g. rear window defroster, lighting, etc.
XOpen the hood.
Jump-starting283
Breakdown assistance
Z

If the tire pressures have been set to the lowervalues for lighter loads and/or lower roadspeeds, the pressures should be reset to thehigher values:
Rif you want to drive with an increased loadand/or
Rif you want to drive at higher speeds
iThe tire pressures for increased loads and/or higher road speeds, shown in the tire pres-sure table, may have a negative effect on driv-ing comfort.
If the tire pressure is not set correctly, this canlead to an excessive build-up of heat and a sud-den loss of pressure.
For more information, contact a qualified spe-cialist workshop.
Important notes on tire pressure
GWARNING
If the tire pressure drops repeatedly, the
wheel, valve or tire may be damaged. Tire
pressure that is too low may result in a tire
blow-out. There is a risk of an accident.
RCheck the tire for foreign objects.
RCheck whether the wheel is losing air or the
valve is leaking.
If you are unable to rectify the damage, con-
tact a qualified specialist workshop.
GWARNING
If you fit unsuitable accessories onto tire
valves, the tire valves may be overloaded and
malfunction, which can cause tire pressure
loss. Due to their design, retrofitted tire pres-
sure monitors keep the tire valve open. This
can also result in tire pressure loss. There is a
risk of an accident.
Only screw the standard valve cap or other
valve caps approved by Mercedes-Benz for
your vehicle onto the tire valve.
Use a suitable pressure gauge to check the tirepressure. The outer appearance of a tire doesnot permit any reliable conclusion about the tirepressure. On vehicles equipped with the elec-tronic tire pressure monitor, the tire pressurecan be checked in the on-board computer.
The tire temperature and pressure increasewhen the vehicle is in motion. This is dependenton the driving speed and the load.
Therefore, you should only correct tire pres-sures when the tires are cold.
The tires are cold:
Rif the vehicle has been parked with the tiresout of direct sunlight for at least three hoursand
Rif the vehicle has been driven less than 1 mile(1.6 km)
The tire temperature changes depending on theoutside temperature, the vehicle speed and thetire load. If the tire temperature changes by18 ‡ (10 †), the tire pressure changes byapproximately 10 kPa (0.1 bar/1.5 psi). Takethis into account when checking the pressure ofwarm tires. Only correct the tire pressure if it istoo low for the current operating conditions. Ifyou check the tire pressure when the tires arewarm, the resulting value will be higher than ifthe tires were cold. This is normal. Do notreduce the tire pressure to the value specifiedfor cold tires. The tire pressure would otherwisebe too low.
Observe the recommended tire pressures forcold tires:
Ron the Tire and Loading Information placardon the B-pillar on the driver's side
Rin the tire pressure table in the fuel filler flap(Ypage 141)
Underinflated or overinflated tires
Underinflated tires
GWARNING
Tires with pressure that is too low can over-
heat and burst as a consequence. In addition,
they also suffer from excessive and/or irreg-
ular wear, which can severely impair the brak-
ing properties and the driving characteristics.
There is a risk of an accident.
Avoid tire pressures that are too low in all the
tires, including the spare wheel.
Underinflated tires may:
Roverheat, leading to tire defects
Radversely affect handling
Tire pressure295
Wheels and tires
Z