air condition MERCEDES-BENZ E CLASS 2019 Owner's Manual

Rfrequent operation in mountainousterrain oron poorroad surfaces
Rwhenthe engine is often leftidlingfor longperiods
Roperation in particularly dusty conditionsand/or if air-recirculation mode is frequentlyused
Inthese or similar operating conditions, havetheinterior airfilter, engine air cleaner, engine oiland oilfilteretc.changed more frequently. Thetires must bechecked more frequently ifthevehicle is operated under increased loads.Fur‐ther information can be obtained at aqualifiedspecialistworkshop.
Battery disconnection periods
The ASSYST PLUS service interval displaycan only calculatethe service due datewhenthe batteryis connected.
Notedownthe service due date displayed onthe instrument display before disconnectingthe battery (→page 347).
Engine compartment
Active hood (pedestrian protection)
Operation ofthe active hood (pedestrian pro‐tection)In certain accident situations,therisk of injurytopedestrians can bereducedbythe actuationofthe active hood. Therear area ofthe hood israisedbyapproximately 3 in (85 mm).
Forthe drivetotheworkshop,resetthe trig‐gered active hoodyourself. Afterthe active hoodhas been triggered, pedestrian protection maybe limited.
Aqualified specialistworkshop mustre-instatethe full functionality ofthe active hood.
The active hood is notavailable in all countries.
Resettingthe active hood
\nWARNINGRisk of burns from hot com‐ponent parts inthe engine compartment
Certain components inthe engine compart‐ment can beveryhot, e.g.the engine,theradiator and parts oftheexhaust system.
Allowthe enginetocool down and onlytouch component parts described inthefollowing.
Withyour handflat, push down active hood1inthe area aroundthe hinges on bothsides (arrows).The hood must engage in position.
Ifthe active hood can beraised slightly attherear inthe area ofthe hinges,repeatthestep until it engages correctly.
348Maintenance and care

Removecap1bythetab.
Addwasherfluid.
Keepingthe air-water duct free
Keepthe area betweenthe hood andthewindshield free of deposits, e.g. ice, snowand leaves.
Cleaning and care
Notes onwashingthevehicle in a carwash
\nWARNINGRisk of accident duetoreduced braking effect afterwashingthevehicle
The braking effect isreduced afterwashingthevehicle.
Afterthevehicle has beenwashed,brake carefully while paying attentiontothe traffic conditions untilthe brakingeffect has been fullyrestored.
NOTEDamageduetounsuitable carwash
Before driving into a carwash makesurethatthe carwash is suitableforthevehicle dimensions.
Ensurethere is sufficient ground clear‐ance betweenthe underbody andtheguiderails ofthe carwash.
Ensurethatthe clearance width ofthecarwash, in particularthe width oftheguiderails, is sufficient.
Toavoid damageto yourvehicle when using acarwash, ensurethefollowing beforehand:
RActive Distance AssistDISTRONIC andtheHOLD function are deactivated.
Rthe 360° Camera ortherear view camera isswitched off.
Rthe side windowsand sliding sunroof arecompletelyclosed.
Rthe blowerfortheventilation/heating isswitched off.
Rthe windshield wiper switch is in positionZ.
Rin carwashes with a conveyor system: neu‐tral\\is engaged.
Rthe SmartKeyis at a distance of at least10ft(3 m)awayfromthevehicle,otherwisethetrunk lid could open unintentionally.
Maintenance and care355

Observethefollowing information:
CleaningAvoiding damagetothe decorativefoil
RFor cleaning, use plenty ofwater and a mild cleaning agent withoutadditives or abrasivesubstances, e.g. a car shampoo approvedforMercedes-Benz.
RRemovedirt immediately, where possible, whilstavoidingrubbingtoo hard. There isotherwise arisk of damagingthe decorativefoilirreparably.
RIfthere is dirt onthefinish or ifthe decorativefoil is dull: usethePaint Cleanerrecommended and approvedfor Mercedes-Benz.
RInsectremains: soak with insectremover andrinse offthe treatedareas afterwards.
RBird droppings: soak withwater andrinse off afterwards.
RTopreventwaterstains, dry afoil-wrappedvehicle with a soft,absorbent clothaftereverycarwash.
RThe service life and color of decorativefoils are impairedby:
-sunlight
-temperature, e.g. hot air blower
-weather conditions
-stonechippings and dirt
-chemical cleaning agents
-oily products
RDo not use polish on matte decorativefoil.Polishing will havethe effectof shiningthefoil-wrapped surface.
RDo not treat matte orstructured decorativefoils withwax.Permanentstains may occur.
Scratches, corrosive deposits, areas affectedbycorrosion and damage causedbyincorrect carecannot alwaysbe completelyrepaired. In suchcases, visit aqualified specialistworkshop.
You can obtain more information on care andcleaning products fromthe manufacturer.
Inthe case offoil-wrapped surfaces, optical dif‐ferences may occur betweenthe surfacesthatwerenot protectedbya decorativefoil afterremoving a decorativefoil.
Haveworkorrepairstodecorativefoils car‐ried out at aqualified specialistworkshop,e.g. in an authorized Mercedes-Benz Center.
Maintenance and care359

Tirepressure
Notes on tire pressure
\nWARNINGRisk of accident duetoinsuf‐ficient orexcessive tire pressure
Underinflated oroverinflated tires posethefollowingrisks:
RThe tires may burst, especially astheload andvehicle speed increase.
RThe tires maywearexcessively and/orunevenly,which maygreatlyimpair tiretraction.
RThe drivingcharacteristics, aswell assteering and braking, may be greatlyimpaired.
Comply withtherecommended tirepressure andcheckthe tire pressure ofall tires includingthe spare wheelregu‐larly:
Rat least once a month
Rwhenthe loadchanges
Rbefore embarking on a longer journey
Rif operating conditionschange, e.g. off-road driving
Adjustthe tire pressure as necessary.
Driving withtire pressurethat istoo high ortoolow can:
RShortenthe service life ofthe tires.
RCause increased tire damage.
RAdversely affect drivingcharacteristics andthus driving safety,e.g. dueto hydroplaning.
\nWARNINGRisk of an accident duetoinsufficient tire pressure
Tires with pressurethat istoo low canover‐heat and burstas aresult.
In addition,theyalso suffer fromexcessiveand/or irregularwear, which can significantlyimpairthe braking properties andthe han‐dlingcharacteristics.
Avoidexcessively low tire pressures inallthe tires, includingthe spare wheel.
Tirepressure which istoo low can cause:
RTiredefects as aresult ofoverheating
RImpaired handlingcharacteristics
RIrregularwear
RIncreased fuel consumption
\nWARNINGRisk of accident fromexces‐sive tire pressure
Tires withexcessively high pressure canburstbecausetheyare damaged more easilybyhighwayfill, pot holesetc.
In addition,theyalso suffer from irregularwear, which can significantly impairthe brak‐ing properties andthe handlingcharacteris‐tics.
Avoidexcessively high tire pressures inallthe tires, includingthe spare wheel.
Excessively high tire pressure canresult in:
RIncreased braking distance
RImpaired handlingcharacteristics
RIrregularwear
386Wheels and tires

RImpaired driving comfort
RSusceptibilitytodamage
\nWARNINGRisk of accident causedbyrepeated drop in tire pressure
Ifthe tire pressure dropsrepeatedly,thewheel,valve or tire may be damaged.
Insufficient tire pressure can causethe tirestoburst.
Inspectthe tirefor signs offoreignobjects.
Check whetherthe wheel orvalve has aleak.
Ifyou are unabletorectifythe damage,contact aqualified specialistworkshop.
You canfind information on tire pressureforthevehicle'sfactory-installed tires onthefollowinglabels:
RTireand Loading Information placard ontheB‑pillar ofyourvehicle (→page 393).
RTirepressuretable onthe inside ofthe fuelfillerflap (→page 387).
Observethe maximum tire pressure(→page 399).
Use a suitable tire pressuregaugetocheckthetire pressure. The outer appearance of a tiredoes not permit anyreliable conclusion aboutthe tire pressure.
Vehicles with a tire pressure monitoring sys‐tem:You can alsocheckthe tire pressure usingthe on-board computer.
Only correct tire pressure whenthe tires arecold. Conditionsfor cold tires:
RThevehicle has been parked withthe tiresout of direct sunlightfor at least three hours.
RThevehicle has traveled lessthan 1 mile(1.6 km).
Arise inthe tiretemperature of18°F (10 °C)increasesthe tire pressurebyapprox.10kPa(0.1 bar/1.5 psi).Takethis into account whencheckingthe tire pressure ofwarmtires.
The tire pressure recommendedfor increasedload/speed inthe tire pressuretable can affecttheride comfort.
\nWARNINGRisk of accident from unsuita‐ble accessories onthe tirevalves
Ifyou mount unsuitable accessories ontotirevalves,the tirevalves may beoverloaded andmalfunction, which can cause tire pressureloss.Tirepressure monitoring systemsforretrofitting will causethe tirevalvetoremainopen. This can alsoresult in tire pressureloss.
Only screwstandardvalve caps orvalvecaps specifically approvedbyMercedes-Benzforyourvehicle ontothe tirevalve.
Tirepressure table
The tire pressuretable is onthe inside ofthefuelfillerflap.
The data shown inthe images isexampledata.
Wheels and tires387

The tire pressuretable shows therecommendedtire pressurefor all tires approvedforthisvehi‐cle. Therecommended tire pressures applyforcold tires undervarious operating conditions, i.e.loading and/or speed ofthevehicle.
If one or more tire sizes precede a tire pressure,the tire pressure informationfollowing is onlyvalidforthose tire sizes.
The load conditions "partially laden" and "fullyladen" are defined inthetablefor different num‐bersof passengers and amounts of luggage. Theactual number of seats may differ fromthis.
Some tire pressuretables only showtherimdiameter instead ofthe completetire size, e.g.R18. Therim diameter is part ofthe tire size andcan befound onthe tire sidewall (→page 400).
Be suretoalso observethefollowing furtherrelated subjects:
RNotes on tire pressure (→page 386)
RTireand Loading Information placard(→page 393)
RMaximum tire pressure (→page 399)
Checking tire pressures manually
Readthe tire pressureforthe current operat‐ing conditions fromtheTireand LoadingInformation placard orthe tire pressuretable. Observethe notes on tire pressure.
Removethevalve cap ofthe tiretobechecked.
Pressthe tire pressuregauge securely ontothevalve.
Readthe tire pressure.
Ifthe tire pressure is lowerthantherecom‐mendedvalue, increasethe tire pressuretotherecommendedvalue.
Ifthe tire pressure is higherthantherecom‐mendedvalue,release air.Todo so, pressdownthe metal pin inthevalve, e.g. usingthe tip of a penforexample. Thencheckthetire pressureagain usingthe tire pressuregauge.
Screwthevalve cap ontothevalve.
388Wheels and tires

The tire pressure losswarning system does notreplacethe needtoregularlycheckthe tire pres‐sure.
System limitations
The system may be impaired or may not functionparticularlyinthefollowing situations:
RIncorrectly set tire pressure
RSudden pressure loss caused,forexample,byaforeign object penetratingthe tire
RSteady pressure loss in several tires
The system has arestricted or delayed functionparticularly inthefollowing situations:
RPoor ground conditions, e.g. snow or gravel
RDriving withsnowchains
RWhen adopting averysporty drivingstylewith high cornering speeds or sudden accel‐eration
RDriving with a high load
Be suretoalso observethefollowing furtherrelated subjects:
RNotes on tire pressure (→page 386)
RDisplay messages aboutthe tires(→page 460)
Restartingthe tire pressure losswarningsystem
Requirements:RTherecommended tire pressure is correctlysetfortherespective operatingstatus oneach ofthefour wheels (→page 386).
Restartthe tire pressure losswarning system inthefollowing situations:
RThe tire pressure haschanged.
RThe wheels or tires havebeenchanged ornewly installed.
On-board computer:
Service Tires
Swipe downwards ontheTouch Control onthe left-hand side ofthesteering wheel.TheTire Pressure Control SystemActiveRestart: Press Touch Controlmessageis shown inthe multifunction display.
Restartthe tire pressure losswarning system inthefollowing situations:
RThe tire pressure haschanged.
RThe wheels or tires havebeenchanged ornewly installed.
Tobegintherestart, presstheTouch Controlonthe left-hand side ofthesteering wheel.TheTire Pressure Now OK?message isshown inthe multifunction display.
SelectYes.
Toconfirmtherestart, presstheTouch Con‐trol onthe left-hand side ofthesteeringwheel.TheRun Flat Indicator Restartedmessage isshown inthe multifunction display.
Afteryou havedrivenfor afew minutes,thetire pressurelosswarning system monitorsthe set tire pressures of allthe tires.
Be suretoalso observethefollowing furtherrelated subjects:
RNotes on tire pressure (→page 386)
392Wheels and tires

UniformTireQuality GradingStandards:auniformstandardtogradethequality of tireswithregardtotreadquality,tire traction andtemperaturecharacteristics. Thequality gradingassessment is madebythe manufacturerfollow‐ing specifications fromtheU.S. government. Thequalitygrade of a tire is imprinted onthe sidewall ofthe tire.
Recommended tire pressure:therecommen‐ded tire pressure isthe tire pressure specifiedforthe tires mountedtothevehicle atthefac‐tory.
The tire and informationtable containstherec‐ommended tire pressuresfor cold tires,the max‐imum permissible load andthe maximum per‐missiblevehicle speed.
The tire pressuretable containstherecommen‐ded tire pressuresfor cold tires undervariousoperating conditions, i.e. loading and/or speedofthevehicle.
Increasedvehicleweight duetooptionalequipment:the combinedweight of allstandardand optional equipmentavailableforthevehicle,
regardless of whether it is actually installed onthevehicle or not.
Rim:the part ofthe wheel on whichthe tire isinstalled.
GAWR (Gross AxleWeightRating):the GAWRisthe maximum permissible axle load. Theactual load on an axle must neverexceedthegrossaxleweightrating. The gross axleweightrating can befound onthevehicle identificationplate onthe B‑pillar onthe driver's side.
Speedrating:the speedrating is partofthe tireidentification. It specifiesthe speedrangeforwhich a tire is approved.
GVW (GrossVehicleWeight):the grossvehicleweight comprisestheweight ofthevehicleincluding fuel,tools,the spare wheel, accesso‐ries installed, occupants, luggage andthe trailerdrawbar noseweight, if applicable. Thegrossvehicleweight must notexceedthe grossvehicleweightratingGVWR as specified onthevehicleidentification plate onthe B‑pillar onthe driver'sside.
GVWR (GrossVehicleWeightRating):theGVWR isthe maximum permitted grossweight
ofthe fully ladenvehicle (weight ofthevehicleincluding all accessories, occupants, fuel, lug‐gageandthe trailer drawbar noseweight if appli‐cable). Thegrossvehicleweightrating is speci‐fied onthevehicle identification plate ontheB‑pillar onthe driver's side.
Maximumweight ofthe ladenvehicle:themaximumweight isthe sum ofthe curbweightofthevehicle,theweight ofthe accessories,themaximum load andtheweight of optional equip‐ment installed atthefactory.
Kilopascal (kPa):metric unitfor tire pressure.6.9 kPa correspondsto1 psi. Another unitfortire pressureis bar.100 kilopascal (kPa) equals1 bar.
Load index:in additiontothe load-bearingindex,the load index may also be imprinted onthe sidewall ofthe tire. This specifiesthe load-bearing capacity ofthe tire more precisely.
Curbweight:theweight of avehicle withstand‐ard equipment includingthe maximum capacityof fuel, oil and coolant. It also includesthe airconditioning system and optional equipment if
Wheels and tires403

Display messagesPossible causes/consequences andPPSolutions
Havethe brake systemchecked immediately at aqualified specialistworkshop.
Drive on carefully.
Visit aqualified specialistworkshop immediately.
'
(USA only)
M
(Canada only)
Check Brake Fluid Level
*There is insufficient brakefluid inthe brakefluidreservoir.
\nWARNINGRisk of an accident duetolow brakefluid level
Ifthe brakefluid level istoo low,the braking effect andthe brakingcharacteristics may be impaired.
Pullover andstopthevehicle safely as soon as possible, paying attentiontoroad and traffic conditions.Do not continue driving under any circumstances.
Consult aqualified specialistworkshop.
Do not add brakefluid.
Pullover andstopthevehicle safely as soon as possible, paying attentiontoroad and traffic conditions. Do notcontinue driving under any circumstances.
Do not add brakefluid.
Consult aqualified specialistworkshop.
Radar Sensors Dirty SeeOperator's Manual
*Theradar sensor system is malfunctioning.Possible causes are:
RDirt onthe sensors
RHeavyrain or snow
Display messages andwarning/indicator lamps433

Display messagesPossible causes/consequences andPPSolutions
Ensure, bothbefore and duringthe journey,thatthestatus ofthe front passenger air bag is correct.
NEVER use arearwardfacingchildrestraint on a seat protectedbyanACTIVE FRONT AIRBAG; DEATH or SERI‐OUS INJURYtotheCHILD can occur.
Pullover andstopthevehicle safely as soon as possible, paying attentiontoroad and traffic conditions.
Checkthestatus ofthe automatic front passenger airbag shutoff (→page 43).
If necessary,consult aqualified specialistworkshop immediately.
Front Passenger Airbag Dis-abled See Operator's Man-ual
*The front passenger airbag andthe knee airbag are deactivated, although an adult or a person with an adultstatureis onthe front passenger seat. If additionalforces are appliedtothe seat,theweightthe system detects may betoo low.
\nWARNINGRisk of injuryorfatal injury duetoa disabled front passenger airbag
Ifthe front passenger airbag is disabled,the front passenger airbag will not be deployed intheevent of an acci‐dent and cannotperformits intended protective function.
A person inthe front passenger seat couldthen,forexample, come into contact with thevehicle's interior,especially ifthe person is sittingtoo closetothe cockpit.
Make sure, bothbefore and duringthe journey,thatthestatus ofthe front passenger airbag is correct.
Pullover andstopthevehicle safely as soon as possible, paying attentiontoroad and traffic conditions.
Checkthestatus ofthe automatic front passenger airbag shutoff (→page 43).
If necessary,consult aqualified specialistworkshop immediately.
438Display messages andwarning/indicator lamps