2019 MERCEDES-BENZ SLC check engine

Customer Assistance Center. The customerservice representative can use the receiveddata to decide what kind of assistance isrequired. You are then, for example, guided tothe nearest Mercedes-Benz Service Center ora recovery vehicle is called.
If vehicle data needs to be transferred duringan MB Info call or a Roadside Assistance call,this is initiated by the Customer AssistanceCenter. You will see theRoadside Assis‐Roadside Assis‐tance Connectedtance Connectedmessage in the COMANDdisplay. If the Vehicle Health Check can bestarted, theRequest for vehicle diagno‐Request for vehicle diagno‐sis received. Start vehicle diagno‐sis received. Start vehicle diagno‐sis?sis?message appears in the display.
XConfirm the message withYesYes.
XWhen theVehicle Diagnosis: PleaseVehicle Diagnosis: Pleasestart ignition.start ignition.message appears, turnthe SmartKey to positionHin the ignitionlock (Ypage 118).
XWhen thePlease follow the instruc‐Please follow the instruc‐tions received by phone and movetions received by phone and moveyour vehicle to a safe positionyour vehicle to a safe positionmes-sage appears, follow the customer servicerepresentative's instructions.The message in the display disappears.
If you selectCancelCancelthe Vehicle HealthCheck is canceled completely.
The vehicle operating state check begins.You will see theVehicle diagnosisVehicle diagnosisactivated.activated.message.
When the check is completed, theSendSendvehicle diagnostics data (Voice con‐vehicle diagnostics data (Voice con‐nection may be interrupted duringnection may be interrupted duringdata transfer)data transfer)message appears. The vehi-cle data can now be sent to the CustomerAssistance Center.
XPressOKOKto confirm the message.The voice connection with the CustomerAssistance Center is terminated.
You will see theVehicle Diagnosis:Vehicle Diagnosis:Transferring data...Transferring data...message.
The vehicle data is sent to the CustomerAssistance Center.
Depending on what the customer service rep-resentative agreed with you, the voice connec-tion is re-established after the transfer is com-plete. If necessary, you will be contacted at alater time by another means, e.g. by e-mail orphone.
Another function of the Vehicle Health Checkis the transfer of service data to the Customer
Assistance Center. If a service is overdue, theCOMAND display shows a message about vari-ous special offers at your workshop.
USA only: this information can also be calledup under "Owners Online" at http://www.mbusa.com.
Information on the data stored in the vehicle(Ypage 28).
Information on Roadside Assistance(Ypage 25).
Garage door opener
General notes
The HomeLink®garage door opener integratedin the rear-view mirror allows you to operateup to 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,park the vehicle outside the garage. Do notrun the engine while programming.
Certain garage door drives are incompatiblewith the integrated garage door opener. If youhave difficulty programing the integratedgarage door opener, contact an authorizedMercedes-Benz Center.
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 26).
USA: FCC ID: CB2HMIHL4
Canada: IC: 279B-HMIHL4
234Features
Stowage and features

XReach into the gap, pull hood catch han-dleDup and lift hoodC.
If you lift the hood by approximately 15 in(40 cm), the hood is opened and held openautomatically by the gas-filled strut.
Closing the hood
XLower the hood and let it fall from a heightof approximately 8 in (20 cm).
XCheck that the hood has engaged properly.If the hood can be raised slightly, it is notproperly engaged. Open it again and close itwith a little more force.
Engine oil
Notes on the oil level
Depending on your driving style, the vehicleconsumes up to 0.9 US qt(0.8 liters) of oil per600 miles (1,000 km). The oil consumptionmay be higher than this when the vehicle isnew or if you frequently drive at high enginespeeds.
Depending on the engine, the oil dipstick maybe in a different location.
When checking the oil level:
Rpark the vehicle on a level surface
Rthe engine should be switched off forapproximately five minutes if the engine isat normal operating temperature
Rif the engine is not at normal operating tem-perature, e.g. if the engine was only startedbriefly, wait about 30 minutes before carry-ing out the measurement
Checking the oil level using the oil dip-
stick
GWARNING
Certain components in the engine compart-
ment, such as the engine, radiator and parts
of the exhaust system, can become very
hot. Working in the engine compartment
poses a risk of injury.
Only touch the following components descri-
bed.
If work is being carried out on public roads,pay attention to the road and traffic conditionsand secure the area as appropriate.
Example
XPull out oil dipstickC.
XWipe off oil dipstickC.
XSlowly slide oil dipstickCinto the guidetube to the stop, and take it out again.If the level is between MIN mark

GWARNING
If engine oil comes into contact with hot
components in the engine compartment, it
may ignite. There is a risk of fire and injury.
Make sure that engine oil is not spilled next
to the filler neck. Let the engine cool down
and thoroughly clean the engine oil off the
components before starting the engine.
HEnvironmental note
When adding oil, take care not to spill any. If
oil enters the soil or waterways, it is harmful
to the environment.
!Use only engine oils and oil filters that areapproved for vehicles with a service system.A list of the engine oils and oil filters thathave been tested and approved in accord-ance with Mercedes-Benz Specifications forService Products is available at any author-ized Mercedes-Benz Center.
The following cause engine failure or dam-age to the exhaust system:
RUse of engine oils and oil filters that havenot been expressly approved for the ser-vice system
RReplacement of engine oil and oil filterafter the replacement interval specifiedby the service system has expired
RUse of engine oil additives
!Do not add too much oil. If the oil level isabove the "max" mark on the dipstick, toomuch oil has been added. This can lead todamage to the engine or the catalytic con-verter. Have excess oil siphoned off.
Example: engine oil cap
XTurn capCcounter-clockwise and removeit.
XAdd engine oil.If the oil level is at or below the MIN markon the oil dipstick, add 1.1 US qt (1.0 liter)of engine oil.
XReplace capCon the filler neck and turnclockwise.Ensure that the cap locks into placesecurely.
XCheck the oil level again with the oil dipstick(Ypage 241).
Further information on engine oil(Ypage 300).
Checking and adding other service
products
Checking coolant level
GWARNING
Certain components in the engine compart-
ment, such as the engine, radiator and parts
of the exhaust system, can become very
hot. Working in the engine compartment
poses a risk of injury.
Where possible, let the engine cool down
and touch only the components described in
the following.
GWARNING
Opening the hood when the engine is over-
heated or when there is a fire in the engine
compartment could expose you to hot gases
or other service products. There is a risk of
injury.
Let an overheated engine cool down before
opening the hood. If there is a fire in the
engine compartment, keep the hood closed
and contact the fire department.
GWARNING
The engine compartment contains moving
components. Certain components, such as
the radiator fan, may continue to run or start
again suddenly when the ignition is off.
There is a risk of injury.
242Engine compartment
Maintenance and care

If you need to do any work inside the engine
compartment:
Rswitch off the ignition
Rnever reach into the area where there is a
risk of danger from moving components,
such as the fan rotation area
Rremove jewelry and watches
Rkeep items of clothing and hair, for exam-
ple, away from moving parts
GWARNING
The cooling system is pressurized, particu-
larly when the motor is warm. If you open
the cap, you could be scalded if hot coolant
sprays out. There is a risk of injury.
Let the engine cool down before you open
the cap. Wear protective gloves and protec-
tive eyewear when opening. Open the cap
slowly to release pressure.
Example
XPark the vehicle on a level surface.
Only check the coolant level when the vehi-cle is on a level surface and the engine hascooled down.
XTurn the SmartKey to positionHin the igni-tion lock (Ypage 118).
On vehicles with KEYLESS-GO, press theStart/Stop button twice (Ypage 118).
XCheck the coolant temperature gage in themultifunction display.The coolant temperature must be below158 ‡ (70 †).
XTurn the SmartKey to position

Maintaining the time-dependent service sched-ule:
XNote down the service due date displayed inthe multifunction display before disconnect-ing the battery.
or
XAfter reconnecting the battery, subtract thebattery disconnection periods from the ser-vice date shown on the display.
Hiding service displays
XPress thevor8button on the steer-ing wheel.
Showing service displays
XSwitch on the ignition.
XPressYoreon the steering wheelto select theServ.Serv.menu.
XPresscordto select theASSYSTASSYSTPLUSPLUSsubmenu and confirm by pressing thevbutton.The service due date appears in the multi-function display.
Information about Service
Resetting the ASSYST PLUS service
interval display
!If the ASSYST PLUS service interval dis-play has been inadvertently reset, this set-ting can be corrected at a qualified special-ist workshop.
Have service work carried out as describedin the Maintenance Booklet. This may other-wise lead to increased wear and damage tothe major assemblies or the vehicle.
A qualified specialist workshop, e.g. an author-ized Mercedes-Benz Center, will reset theASSYST PLUS service interval display after theservice work has been carried out. You canalso obtain further information on mainte-nance work, for example.
Special service requirements
The specified maintenance interval takes onlythe normal operation of the vehicle intoaccount. Service work will need to be per-formed more often if the vehicle is operatedunder arduous conditions or increased loads.
The ASSYST PLUS service interval display isonly an aid. The driver of the vehicle is respon-sible for whether service work will need to beperformed more frequently than required as aresult of the actual operating conditionsand/or loads.
Examples of arduous operating conditions:
Rregular city driving with frequent intermedi-ate stops
Rthe vehicle is primarily used to travel shortdistances
Rfrequent use in mountainous terrain or onpoor road surfaces
Rthe engine is often left idling for long peri-ods
Rparticularly dusty conditions, or if air-recir-culation mode is frequently used
In these or similar operating conditions, havethe interior filter, air filter, engine oil and oil fil-ter, for example, changed more frequently.Under arduous operating conditions, the tiresmust be checked more often. Further informa-tion can be obtained at a qualified specialistworkshop.
Driving abroad
An extensive Mercedes-Benz Service networkis also available in other countries. You canobtain further information from any authorizedMercedes-Benz Service Center.
Care
Notes on care
HEnvironmental note
Dispose of empty packaging and cleaning
cloths in an environmentally responsible
manner.
!When cleaning your car, do not use:
Rdry, coarse or hard cloths
Rabrasive cleaning agents
Care245
Maintenance and care
Z

teristics, e.g. winter tires. A TIREFIT kit may beobtained from a qualified specialist workshop.
Information on changing and mounting wheels(Ypage 288).
XStop the vehicle on solid, non-slippery andlevel ground, as far away as possible fromtraffic.
XSwitch on the hazard warning lamps.
XSecure the vehicle against rolling away(Ypage 134).
XIf possible, bring the front wheels into thestraight-ahead position.
XSwitch off the engine.
XVehicles without KEYLESS-GO:removethe SmartKey from the ignition lock.
XVehicles with KEYLESS-GO:open the driv-er's door.The vehicle electronics are now in positionZ. This is the same as the SmartKey havingbeen removed.
XVehicles with KEYLESS-GO:remove theStart/Stop button from the ignition lock(Ypage 118).
XMake sure that the passengers are notendangered as they do so. Make sure thatno one is near the danger area while awheel is being changed. Anyone who is notdirectly assisting in the wheel changeshould, for example, stand behind the bar-rier.
XGet out of the vehicle. Pay attention to traf-fic conditions when doing so.
XClose the driver's door.
MOExtended tires (tires with run-flat
properties)
General notes
With MOExtended tires (tires with run flatcharacteristics), you can continue to drive yourvehicle even if there is a total loss of pressurein one or more tires. The affected tire must notshow any clearly visible damage.
You can recognize an MOExtended tire by theMOExtended marking which appears on thesidewall of the tire. You will find this markingnext to the tire size designation, the load-bear-ing capacity and the speed index(Ypage 283).
MOExtended tires may only be used in con-junction with an active tire pressure loss warn-ing system or with an active tire pressure mon-itor.
If a pressure loss warning messageappears in the multifunction display:
Robserve the instructions in the display mes-sages (Ypage 201)
Rcheck the tire for damage
Rif driving on, observe the following notes
The driving distance possible in run-flat modeis approximately 50 miles (80 kilometers)when the vehicle is partially laden and approx-imately 19 miles (30 kilometers) when thevehicle is fully laden.
In addition to the vehicle load, the driving dis-tance possible depends upon:
RVehicle speed
RRoad condition
ROutside temperature
The driving distance possible in run-flat modemay be reduced by extreme driving conditionsor maneuvers, or it can be increased through amoderate style of driving.
The driving distance possible in run-flat modeis counted from the moment the tire pressureloss warning appears in the multifunction dis-play.
You must not exceed a maximum designspeed of 50 mph (80 km/h).
When replacing one or all tires, please observethe following specifications for your vehicle'stires:
RSize
RType and
RThe "MOExtended" mark
If a tire has gone flat and cannot be replacedwith an MOExtended tire, a standard tire maybe used as a temporary measure. Make surethat you use the proper size and type (summeror winter tire).
Vehicles equipped with MOExtended tires arenot equipped with a TIREFIT kit at the factory.It is therefore recommended that you addition-ally equip your vehicle with a TIREFIT kit if youmount tires that do not feature run-flat charac-teristics, e.g. winter tires. A TIREFIT kit can beobtained from a qualified specialist workshop,for example.
Flat tire253
Breakdown assistance

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 thecarpet or other synthetic materials
Rif you wipe the battery with a cloth
GWARNING
During the charging process, a battery pro-
duces 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
contact with vehicle parts.
RNever place metal objects or tools on a
battery.
RIt is important that you observe the
described order of the battery terminals
when connecting and disconnecting a bat-
tery.
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
batteries. Wash away battery acid immedi-
ately with plenty of clean water and seek
medical attention.
HEnvironmental note
Batteries contain pollutants.
It is illegal to dispose of
them with the household
rubbish. They must be col-
lected separately and dis-
posed of in an environmen-
tally responsible recycling
system.
Dispose of batteries in an
environmentally responsible
manner. Take discharged
batteries to a qualified spe-
cialist workshop or to a col-
lection point for used bat-
teries.
!Have the battery regularly checked at aqualified specialist workshop.
Comply with the service intervals in theMaintenance Booklet, or contact a qualifiedspecialist workshop for more information.
!Always have work on batteries carried outat a qualified specialist workshop.
Should it, in exceptional circumstances, beabsolutely necessary to disconnect the 12-volt battery yourself, please observe the fol-lowing:
RSecure the vehicle to prevent it from roll-ing away.
RSwitch off the ignition.
RDisconnect the negative terminal first andthen the positive terminal.
The transmission is locked in position]after disconnecting the battery.
After the work has been done, install thebattery and replace the cover of the positiveterminal clamp firmly.
Comply with safety precautions and take pro-tective measures when handling batteries.
Risk of explosion.
Fire, open flames and smoking areprohibited when handling the bat-tery. Avoid creating sparks.
258Battery (vehicle)
Breakdo wn assis tan ce

Battery acid is caustic. Avoid con-tact with skin, eyes or clothing.
Wear suitable protective clothing,especially gloves, apron and face-guard.
Rinse any acid spills immediatelywith clear water. Contact a physi-cian if necessary.
Wear eye protection.
Keep children away.
Observe this Operator's Manual.
For safety reasons, Mercedes-Benz recom-mends that you only use batteries which havebeen tested and approved for your vehicle byMercedes-Benz. These batteries provideincreased impact protection to prevent vehicleoccupants from suffering acid burns shouldthe battery be damaged in the event of anaccident.
In order for the battery to achieve the maxi-mum possible service life, it must always besufficiently charged.
Like other batteries, the vehicle battery maydischarge over time if you do not use the vehi-cle. In this case, have the battery disconnec-ted at a qualified specialist workshop. You canalso charge the battery with a charger recom-mended by Mercedes-Benz. Contact a quali-fied specialist workshop for further informa-tion.
Have the battery condition of charge checkedmore frequently if you use the vehicle mainlyfor short trips or if you leave it standing idlefor a lengthy period. Consult a qualified spe-cialist workshop if you wish to leave your vehi-cle parked for a long period of time.
Remove the SmartKey if you park the vehicleand do not require any electrical consumers.The vehicle will then use very little energy,thus conserving battery power.
If the power supply has been interrupted, e.g.if you reconnect the battery, you will have to:
Rreset the function for automatically foldingthe exterior mirrors in/out by folding themirrors out once (Ypage 93)
Rset the clock
On vehicles with a multimedia system, thetime is set automatically.
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 suffi-
cient 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
batteries. Wash away battery acid immedi-
ately with plenty of clean water and seek
medical attention.
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 14.8V.
!Onlycharge the battery using the jump-starting connection point.
The jump-starting connection point is in theengine compartment.
Battery (vehicle)259
Breakdown assistance
Z