length MERCEDES-BENZ GLC 2019 Owners Manual

Window curtain air bagsCare integrated intothe side of the roof frame and deployed in thearea from the A-pillar to the C-pillar.
When deployed, the window curtain air bagenhances the level of protection for the head.However, it does not protect the chest or arms.
If the restraint system control unit detects a sideimpact, the window curtain air bag is deployedon the side on which the impact occurs.
If the system determines that they can offeradditional protection to that provided by theseat belt, a window curtain air bag may bedeployed in other accident situations(Ypage 55).
Occupant Classification System
(OCS)
Introduction
The Occupant Classification System (OCS) cat-egorizes the person in the front-passenger seat.Depending on that result, the front-passengerfront air bag is either enabled or deactivated.
The system does not deactivate:
Rthe side impact air bag
Rthe window curtain air bag
Rthe Emergency Tensioning Devices
Requirements
To be classified correctly, the front passengermust sit:
Rwith the seat belt fastened correctly
Rin an almost upright position with their backagainst the seat backrest
Rwith their feet resting on the floor, if possible
If the front passenger does not observe theseconditions, OCS may produce a false classifica-tion, e.g. because the front passenger:
Rtransfers their weight by supporting them-selves on a vehicle armrest
Rsits in such a way that their weight is raisedfrom the seat cushion
If it is absolutely necessary to install a childrestraint system on the front-passenger seat, besure to observe the correct positioning of thechild restraint system. Never place objectsunder or behind the child restraint system, e.g. acushion. Fully retract the seat cushion length.The entire base of the child restraint system
must always rest on the seat cushion of thefront-passenger seat. The backrest of theforward-facing child restraint system must lie asflat as possible against the backrest of the front-passenger seat.
The child restraint system must not touch theroof or be subjected to a load by the headrestraint. Adjust the angle of the seat backrestand the head restraint position accordingly.
Only then can OCS be guaranteed to functioncorrectly. Always observe the child restraint sys-tem manufacturer's installation and operatinginstructions.
Occupant Classification System opera-
tion (OCS)
CPASSENGER AIR BAG ON indicator lamp
DPASSENGER AIR BAG OFF indicator lamp
The indicator lamps inform you whether thefront-passenger front air bag is deactivated orenabled.
XPress the Start/Stop button once or twice, orturn the SmartKey to positionGorHin theignition lock.The system carries out self-diagnostics.
The PASSENGER AIR BAG OFF and PASSENGERAIR BAG ON indicator lamps must light up simul-taneously for approximately six seconds.
The indicator lamps display the status of thefront-passenger front air bag.
RPASSENGER AIR BAG ON lights up for 60 sec-onds, subsequently both indicator lamps areoff (PASSENGER AIR BAG ON and OFF): thefront-passenger front air bag is able to deployin the event of an accident.
RPASSENGER AIR BAG OFF lights up: the front-passenger front air bag is deactivated. It willthen not be deployed in the event of an acci-dent.
Occupant safety51
Safety
Z

If the PASSENGER AIR BAG ON indicator lamp isoff, only the PASSENGER AIR BAG OFF indicatorlamp shows the status of the front-passengerfront air bag. The PASSENGER AIR BAG OFFindicator lamp may be lit continuously or be off.
If the status of the front-passenger front air bagchanges while the vehicle is in motion, an air bagdisplay message appears in the instrument clus-ter (Ypage 237). When the front-passengerseat is occupied, always pay attention to thePASSENGER AIR BAG OFF indicator lamp. Beaware of the status of the front-passenger frontair bag both before and during the journey.
GWARNING
If the PASSENGER AIR BAG OFF indicator
lamp is lit, the front-passenger front air bag is
disabled. It will not be deployed in the event of
an accident and cannot perform its intended
protective function. A person in the front-
passenger seat could then, for example, come
into contact with the vehicle's interior, espe-
cially if the person is sitting too close to the
dashboard. This poses an increased risk of
injury or even fatal injury.
When the front-passenger seat is occupied,
always ensure that:
Rthe classification of the person in the front-
passenger seat is correct and the front-
passenger front air bag is enabled or disa-
bled in accordance with the person in the
front-passenger seat
Rthe front-passenger seat has been moved
back as far back as possible.
Rthe person is seated correctly.
Make sure, both before and during the jour-
ney, that the status of the front-passenger
front air bag is correct.
GWARNING
If you secure a child in a rearward-facing child
restraint system on the front-passenger seat
and the PASSENGER AIR BAG OFF indicator
lamp is off, the front-passenger front air bag
can deploy in the event of an accident. The
child could be struck by the air bag. This poses
an increased risk of injury or even fatal injury.
Make sure that the front-passenger front air
bag has been deactivated. The PASSENGER
AIR BAG OFF indicator lamp must be lit.
NEVER use a rearward-facing child restraint
on a seat protected by an ACTIVE FRONT AIR-
BAG in front of it; DEATH or SERIOUS INJURY
to the child can occur.
If the PASSENGER AIR BAG OFF indicator lampstays off, do not install a rearward-facing childrestraint system on the front-passenger seat.You can find more information on OCS under"Problems with the Occupant Classification Sys-tem" (Ypage 54).
GWARNING
If you secure a child in a forward-facing child
restraint system on the front-passenger seat
and you position the front-passenger seat too
close to the dashboard, in the event of an
accident, the child could:
Rcome into contact with the vehicle's inte-
rior if the PASSENGER AIR BAG OFF indi-
cator lamp is lit, for example
Rbe struck by the air bag if the PASSENGER
AIR BAG OFF indicator lamp is off
This poses an increased risk of injury or even
fatal injury.
Always move the front-passenger seat as far
back as possible and fully retract the seat
cushion length. Always make sure that the
shoulder belt strap is correctly routed from
the vehicle belt sash guide to the shoulder
belt guide on the child restraint system. The
shoulder belt strap must be routed forwards
and downwards from the vehicle belt sash
guide. If necessary, adjust the vehicle belt
sash guide and the front-passenger seat
accordingly. Always observe the child
restraint system manufacturer's installation
instructions.
If OCS determines that:
RThe front-passenger seat is unoccupied, thePASSENGER AIR BAG OFF indicator lamplights up after the system self-test and
52Occupant safety
Safety

ProblemPossible causes/consequences andPPSolutions
The PASSENGER AIRBAG OFF indicator lamplights up and remains lit,even though the front-passenger seat is occu-pied by an adult or a per-son of a stature corre-sponding to that of anadult.
The classification of the person on the front-passenger seat is incor-rect.
XMake sure the conditions for a correct classification of the personon the front-passenger seat are met (Ypage 51).
XIf the PASSENGER AIR BAG OFF indicator lamp remains lit, the front-passenger seat may not be used.
XHave OCS checked as soon as possible at an authorized Mercedes-Benz Center.
The PASSENGER AIRBAG OFF indicator lampdoes not light up and/ordoes not stay on.
The front-passenger seatis:
Runoccupied
Roccupied by theweight of a child up totwelve months old in achild restraint system
OCS is malfunctioning.
XMake sure there is nothing between the seat cushion and the childseat.
XMake sure that the entire base of the child restraint system rests onthe seat cushion of the front-passenger seat. The backrest of theforward-facing child restraint system must lie as flat as possibleagainst the backrest of the front-passenger seat. If necessary,adjust the position of the front-passenger seat.
XMake sure that the seat cushion length is fully retracted.
XWhen installing the child restraint system, make sure that the seatbelt is tight. Do not pull the seat belt tight using the front-passengerseat adjustment. This could result in the seat belt and the childrestraint system being pulled too tightly.
XCheck for correct installation of the child restraint system.
Make sure that the head restraint does not apply a load to the childrestraint system. If necessary, adjust the head restraint accord-ingly.
XMake sure that no objects are applying additional weight onto theseat.
XIf the PASSENGER AIR BAG OFF indicator lamp remains off and/orthe PASSENGER AIR BAG ON indicator lamp lights up, do not installa child restraint system on the front-passenger seat. It is recom-mended that you install the child restraint system on a suitable rearseat.
XHave OCS checked as soon as possible at an authorized Mercedes-Benz Center.
Deployment of Emergency Tensioning
Devices and air bags
Important safety notes
GWARNING
The air bag parts are hot after an air bag has
been deployed. There is a risk of injury.
Do not touch the air bag parts. Have a
deployed air bag replaced at a qualified spe-
cialist workshop as soon as possible.
GWARNING
A deployed air bag no longer offers any pro-
tection and cannot provide the intended pro-
tection in an accident. There is an increased
risk of injury.
Have the vehicle towed to a qualified special-
ist workshop in order to have a deployed air
bag replaced.
It is important for your safety and that of yourpassenger to have deployed air bags replaced
Occupant safety55
Safety
Z

You can thus avoid the risks that could arise asa result of:
Ran incorrectly categorized person in the front-passenger seat
Rdeactivating the front passenger front air bagunintentionally
Rthe unsuitable positioning of the childrestraint system, e.g. too close to the dash-board
Rearward-facing child restraint system
If circumstances require you to secure a child ina rearward-facing child restraint system on thefront-passenger seat, always make sure that thefront passenger front air bag is deactivated.Only if the PASSENGER AIR BAG OFF indicatorlamp is lit continuously (Ypage 44), is the frontpassenger front air bag deactivated.
Always observe the child restraint system man-ufacturer's installation and operating instruc-tions.
Forward-facing child restraint system
If it is absolutely necessary to install a forward-facing child restraint system on the front-passenger seat, always move the front-passenger seat as far back as possible. Fullyretract the seat cushion length. The entire baseof the child restraint system must always rest onthe seat cushion of the front-passenger seat.The backrest of the child restraint system mustlie as flat as possible against the backrest of thefront-passenger seat. The child restraint systemmust not touch the roof or be subjected to a loadby the head restraint. Adjust the angle of theseat backrest and the head restraint positionaccordingly. Always make sure that the shoul-der belt strap is correctly routed from the vehi-cle belt outlet to the shoulder belt guide on thechild restraint system. The shoulder belt strapmust be routed forward and down from the vehi-cle belt outlet. If necessary, adjust the vehiclebelt outlet and the front-passenger seat accord-ingly.
Always observe the child restraint system man-ufacturer's installation and operating instruc-tions.
Child-proof locks
Important safety notes
GWARNING
If children are traveling in the vehicle, they
could:
Ropen doors, thus endangering other people
or road users
Rexit the vehicle and be caught by oncoming
traffic
Roperate vehicle equipment and become
trapped
There is a risk of an accident and injury.
Always activate the child-proof locks and
override feature if children are traveling in the
vehicle. When leaving the vehicle, always take
the key with you and lock the vehicle. Never
leave children unattended in the vehicle.
Override feature for:
Rthe rear doors (Ypage 64)
Rthe rear side windows (Ypage 64)
GWARNING
If you leave children unsupervised in the vehi-
cle, they could set it in motion by, for example:
Rrelease the parking brake.
Rshift the automatic transmission out of the
parking positionP.
Rstart 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.
GWARNING
If persons, particularly children are subjected
to prolonged exposure to extreme heat or
cold, there is a risk of injury, possibly even
fatal. Never leave children unattended in the
vehicle.
Children in the vehicle63
Safety
Z

Electric parking brake
General notes
GWARNING
If you leave children unsupervised in the vehi-
cle, they could set it in motion by, for example:
Rrelease the parking brake.
Rshift the automatic transmission out of the
parking positionP.
Rstart 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 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 happens, park the vehicle on levelground only and secure it to prevent it fromrolling away.
XShift the 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 apply: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 be released:
Rif the SmartKey is in positionGorHin theignition lock (Ypage 131) 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 on the instrument cluster lightsup.
The electric parking brake is not automaticallyapplied if the engine is switched off by the ECOstart/stop function.
154Parking
Driving and parking

for safe maneuvering, parking and exiting aparking space. Make sure that no persons, ani-mals or objects are in the path of your vehicle.
When Parking Assist PARKTRONIC is deactiva-ted, Active Parking Assist is also unavailable.
For vehicles with a trailer tow hitch installed, theminimum length for parking spaces is slightlylonger.
If you have attached a trailer to your vehicle, youshould not use Active Parking Assist. Once theelectrical connection is established betweenyour vehicle and the trailer, Active ParkingAssist is no longer available. Parking AssistPARKTRONIC is deactivated for the rear area.
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
result in a collision with another road user.
There is a risk of an accident.
Pay attention to other road users. Stop the
vehicle if necessary or cancel the Active Park-
ing 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
Parking tips:
ROn narrow roads, drive as close to the parkingspace as possible
RParking spaces that are littered or overgrownmight be identified or measured incorrectly
RParking spaces that are partially occupied bytrailer drawbars might not be identified assuch or be measured incorrectly
RSnowfall or heavy rain may lead to a parkingspace being measured inaccurately
RPay attention to the warning messages ofParking Assist PARKTRONIC during the park-ing procedure (Ypage 181).
RYou can intervene in the steering procedureto correct it at any time. Active Parking Assistis then deactivated
RWhen transporting a load which protrudesfrom your vehicle, you should not use ActiveParking Assist
Rnever use Active Parking Assist when snowchains are installed
RAlways pay attention to the specified tirepressure for your vehicle. This has a directinfluence on the parking characteristics of thevehicle.
Use Active Parking Assist for parking spaces:
Rparallel or at right angles to the direction oftravel
Ron straight roads, not bends
Ron the same level as the road, e.g. not on thepavement
Detecting parking spaces
Objects located above the detection range ofActive Parking Assist will not be detected whenthe parking space is measured. These are nottaken into account when the parking procedureis calculated, e.g. overhanging loads, tail sec-tions or loading ramps of trucks. Active ParkingAssist may therefore guide you into the parkingspace too early.
GWARNING
If there are objects above the detection range:
RActive Parking Assist may steer too early
Rthe vehicle may not stop in front of these
objects
This could cause a collision. There is a risk of
an accident.
If objects are located above the detection
range, stop and deactivate Active Parking
Assist.
Further information about the detection range(Ypage 180).
176Driving systems
Driving and parking

Rif there is a strong side wind
Rif you have adopted a sporty driving style withhigh cornering speeds or high rates of accel-eration
Rif you are predominantly driving at a speedbelow 37 mph (60 km/h) or above 124 mph(200 km/h)
Rif you are driving with Active Steering Assist ofActive Distance Assist DISTRONIC activated
Rif the time has been set incorrectly
Rin active driving situations, such as when youchange lanes or change your speed
The ATTENTION ASSIST tiredness assessmentis deleted and restarted when continuing thejourney, if:
Ryou switch off the engine
Ryou take off your seat belt and open the driv-er's door, e.g. for a change of drivers or totake a break
Displaying the attention level
In the Assistance menu (Ypage 220) of the on-board computer, you can call up the current sta-tus information.
XSelect the Assistance display for ATTENTIONASSIST using the on-board computer(Ypage 219).
The following information appears:
RThe length of the journey since the last break.
Rthe attention level determined by ATTENTIONASSIST (Attention LevelAttention Level), displayed in abar display in five levels from high to low.
Rif ATTENTION ASSIST is unable to calculatethe attention level and cannot issue a warn-ing, theSystem SuspendedSystem Suspendedmessageappears. The bar display then changes thedisplay, e.g. if you are driving at a speed below
37 mph (60 km/h) or above 124 mph(200 km/h).
Activating ATTENTION ASSIST
XActivate ATTENTION ASSIST using the on-board computer (Ypage 221).The system determines the attention level ofthe driver depending on the setting selected:
SelectionStandardStandard: the sensitivity with whichthe system determines the attention level is setto normal.
SelectionSensitiveSensitive: the sensitivity is sethigher. The attention level detected by ATTEN-TION ASSIST is adapted accordingly and thedriver is warned earlier.
When ATTENTION ASSIST is deactivated, the

XSwitch off the engine.
XClose the doors and tailgate.
XCouple up the trailer.
XEstablish the electrical connection betweenthe vehicle and the trailer.
XCheck that the trailer lighting system is work-ing.
XPush the combination switch upwards/down-wards and check whether the correspondingturn signal on the trailer flashes.
A trailer that is connected is recognized onlywhen the electrical connection is establishedcorrectly and when the lighting system is work-ing properly. The function of other systems alsodepends on this, for example:
RESP®
RPARKTRONIC
RActive Parking Assist
RActive Blind Spot Assist
RActive Lane Keeping Assist
Vehicles with AIR BODY CONTROL: if you coupleup a trailer, the vehicle always remains at high-way level. Observe the following note when cou-pling up a trailer:
RUnless highway level has been set manually,the vehicle is automatically lowered to high-way level. If a speed of 5 mph (8 km/h) hasbeen reached, this may be the case.
These restrictions apply to accessories that aresupplied with power via the trailer socket in yourvehicle, e.g. a rear bicycle rack.
Observe the maximum permissible trailerdimensions (width and length).
Most U.S. states and all Canadian provincesrequire by law:
RSafety chains between the towing vehicle andthe trailer. The chains should be cross-woundunder the trailer drawbar. They must be fas-tened to the vehicle's trailer coupling, not tothe bumper or the axle.
Leave enough play in the chains to make tightcornering possible.
RA separate brake system for certain types oftrailer.
RSafety switch for braked trailers. Check thespecific legal requirements applicable to yourstate.
If the trailer becomes detached from the tow-ing vehicle, the safety feature applies thetrailer brakes.
Towing a trailer
There are several legal requirements for towinga trailer, e.g. the maximum permissible speed.Make sure that your car/trailer combinationcomplies with the local regulations:
Rin your place of residence
Rat your destination
The police and local authorities can provide reli-able information.
To accumulate driving experience and accustomyourself to the new handling characteristics,practice the following at a location where thereis no traffic:
RCornering
RStopping
RBacking up
Check the following before the journey:
RTrailer tow hitch
RSafety switch for braked trailers
RSafety chains
RElectrical connections
RLighting system
RWheels and tires
RLoad securing
Adjust the exterior mirrors so that you have aclear view of the rear section of the trailer.
If the trailer is equipped with electronically con-trolled brakes, pull away carefully in the car/trailer combination. Brake manually using thebrake controller and check whether the brakesfunction correctly.
Regularly check that the load is secure.
When towing a trailer, your vehicle's handlingcharacteristics will be different in comparisonwith when driving without a trailer.
The vehicle/trailer combination:
Ris heavier
Ris restricted in its acceleration and gradient-climbing capability
Rhas an increased braking distance
Ris affected more by strong crosswinds
Rdemands more sensitive steering
Rhas a larger turning circle
Avoid sudden steering movements.
Avoid braking abruptly. If possible, brake gentlyat first to allow the trailer to run on. Then,increase the braking force rapidly.
Towing a trailer205
Driving and parking
Z

When overtaking, pay particular attention to theextended length of your vehicle/trailer combi-nation.
Due to the length of the vehicle/trailer combi-nation, you require additional road space whenovertaking before you can change back to theoriginal lane.
If the automatic transmission repeatedly shiftsbetween gears on uphill or downhill gradients,shift to a lower gear.
Driving in a lower gear and at a reduced speeddecreases the risk of engine damage.
If the coolant temperature increases signifi-cantly when climate control is switched on,switch climate control off.
Coolant heat can also be dissipated by openingthe windows and switching the ventilationblower and the interior temperature to the high-est level.
Decoupling a trailer
GWARNING
If you uncouple a trailer with the overrun
brake engaged, you could trap your hand
between the vehicle and the trailer drawbar.
There is a risk of injury.
Do not uncouple a trailer if the overrun brake
is engaged.
GWARNING
Vehicles with level control:
The vehicle is lowered as soon as you discon-
nect the trailer cable. This could result in your
limbs or those of other people that are
between the vehicle body and tires or under-
neath the vehicle being trapped. There is a
risk of injury.
Make sure that nobody is in the immediate
vicinity of the wheel housings or under the
vehicle when you disconnect the trailer cable.
!Do not disconnect a trailer with an engagedoverrun brake. Otherwise, your vehicle couldbe damaged by the rebounding of the overrunbrake.
XApply the vehicle's parking brake manually.
XShift the transmission to position].
XClose all doors and the tailgate.
XSwitch off the engine.
XSecure the vehicle and trailer against rollingaway.
XRemove the trailer cable.
XRemove the safety chains, if there are any.
XUncouple the trailer.
Removing the ball coupling
XObserve the manufacturer's installationinstructions.
XPress the protective cap into the ball couplingrecess.
XMake sure that the protective cap is firmly inplace.
Observe the loading guidelines (Ypage 278)and the safety notes regarding stowage spaces(Ypage 278).
Information on cleaning and care of the trailertow hitch (Ypage 310).
Trailer power supply
!Accessories with a maximum power con-sumption of 180 W can be connected to thepermanent power supply.
You must not charge a trailer battery using thepower supply.
The trailer socket of your vehicle is equipped atthe factory with a permanent power supply.
The permanent power supply is supplied viatrailer socket pin 4.
The trailer's permanent power supply isswitched off in the event of low vehicle supplyvoltage and after six hours at the latest.
A qualified specialist workshop can providemore information about installing the trailerelectrics.
Permissible trailer loads and trailer
drawbar noseweights
Weight specifications
The gross trailer weight is calculated as theweight of the trailer plus the weight of the loadand the trailer's equipment.
206Towing a trailer
Driving and parking

Mercedes-Benz. These batteries provideincreased impact protection to prevent vehicleoccupants from suffering acid burns should thebattery be damaged in the event of an accident.
In order for the battery to achieve the maximumpossible service life, it must always be suffi-ciently charged.
Like other batteries, the vehicle battery maydischarge over time if you do not use the vehicle.In this case, have the battery disconnected at aqualified specialist workshop. You can alsocharge the battery with a charger recommendedby Mercedes-Benz. Contact a qualified special-ist workshop for further information.
Have the battery charge state checked morefrequently if you use the vehicle mainly for shorttrips or if you leave it standing idle for a lengthyperiod. Consult a qualified specialist workshopif you wish to leave your vehicle parked for a longperiod of time.
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.
Charging the 12 V battery
Vehicles with a lithium-ion battery:
!Only use battery chargers with a maximumcharging voltage of 14.4 V.
All vehicles except vehicles with a lithium-ion battery:
!Only use battery chargers with a maximumcharging voltage of 14.8 V.
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.
All vehicles:
!Only charge the battery using the jump-starting connection point.
The jump-starting connection point is in theengine compartment (Ypage 322).
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 322).
Keep away from fire and open flames. Do notlean over a battery. Never charge the battery if itis still installed in the vehicle, unless you use abattery charger which has been tested andapproved by Mercedes-Benz. A battery chargerunit specially adapted for Mercedes-Benz vehi-cles and tested and approved by Mercedes-Benz is available as an accessory. It permits thecharging of the battery in its installed position.Contact an authorized Mercedes-Benz Centerfor further information and availability. Read thebattery charger's operating instructions beforecharging the battery.
All vehicles except vehicles with a lithium-ion battery:if the warning and indicator lampson the instrument cluster do not light up at lowtemperatures, it is very likely that the dis-charged battery has frozen. In this case you mayneither jump-start the vehicle nor charge thebattery. The service life of a thawed-out batterymay be shorter. The starting characteristics canbe impaired, particularly at low temperatures.Have the thawed-out battery checked at a quali-fied specialist workshop.
Vehicles with a lithium-ion battery:at lowtemperatures, do not charge a battery which hasbeen removed using a battery charger. Allow the
Battery (vehicle)321
Breakdown assistance
Z