towing MERCEDES-BENZ S CLASS 2019 Repair Manual

#Duringstarting assistance:starttheengine ofthe donorvehicle andrun at idlespeed.
#Connectthe negative pole ofthe donor bat‐teryandground point5ofyourownvehiclebyusingthe jumper cable/charging cable.Begin withthe donor batteryfirst.
#Duringstarting assistance:starttheengine ofyourownvehicle.
#Duringthecharging process:startthecharging process.
#Duringstarting assistance:letthe enginesrunfor several minutes.
#Duringstarting assistance:before discon‐nectingthe jumper cable, switch on an elec‐trical consumer inyourownvehicle, e.g.therear windowdefroster or lighting.
Whenthestarting assistance/charging processis complete:
#First,removethe jumper cable/chargingcable from ground point5and negativepole ofthe donor battery,then from positiveclamp4and positive pole ofthe donor bat‐
tery. Begin eachtime with the contacts onyourownvehiclefirst.
#Afterremovingthe jumper cable/chargingcable, close cover3of positive clamp4.
Further information can be obtained at aquali‐fied specialistworkshop.
Replacing the12V battery
#Observethe notes onthe12V battery(→page419).
Mercedes-Benzrecommendsthatyou havethe12V batteryreplaced at aqualified specialistworkshop, e.g. at an authorized Mercedes-BenzCenter.
Observethefollowing notes ifyouwanttoreplacethe batteryyourself:
RAlwaysreplace afaulty batterywith a batterywhich meetsthe specificvehiclerequire‐ments.
Thevehicle is equipped with anAGMtechnol‐ogy battery (Absorbent Glass Mat) or a lith‐ium-ion battery.Fullvehicle functionality is
only guaranteed with anAGM battery or lith‐ium-ion battery.For safetyreasons,Mercedes-Benzrecommendsthatyou onlyuse batteries which havebeentested andapprovedforyourvehiclebyMercedes-Benz.
RCarryover detachable parts, such asventhoses, elbowfitting orterminal coversfromthe battery beingreplaced.
RMake surethatthevent hose is alwayscon‐nectedtothe original opening onthe side ofthe battery.
Install anyexisting or supplied cell caps.
Otherwise,gases or battery acid couldescape.
RMake surethat detachable parts arerecon‐nected inthe sameway.
Towstarting ortowingaway
Permittedtowing methods
Plug-inhybrid:observethe notes inthe Supple‐ment. Otherwise,you may notrecognize dan‐gers.
424Breakdown assistance

Mercedes-Benzrecommends transportingyourvehicle inthe case of a breakdown,ratherthantowing itaway.
Fortowing, use atowrope ortow bar with bothaxles onthe ground. Do not usetow bar systems(→page249).
*NOTEDamagetothevehicle dueto tow‐ingawayincorrectly
#Observethe instructions and notes ontowingaway.
Towing with araised axle:towing should beperformedbyatowing company.
Permittedtowing methods
Vehicle equipment/towingmethod
Bothaxles onthegroundFront axleraisedRear axleraised
Vehicles with automatic transmis‐sionYes, maximum31miles (50 km) at31mph (50 km/h)NoYes, ifthesteering wheel isfixed inthe center position with asteeringwheel lock
4MATICvehiclesYes, maximum31miles (50 km) at31mph (50 km/h)NoNo
Breakdown assistance425

Towingthevehicle with bothaxles ontheground
#Observethe notes onthe permittedtowingmethods (→page 424).
#Make surethatthe battery is connected andcharged.
Whenthe battery is discharged,thefollowingactions cannot be performed:
Rthe engine cannotbestarted
Rthe electric parking brake cannotbereleasedor applied
Rthe automatic transmission cannotbe shiftedtoposition\\or]
%Ifthe automatic transmission cannotbe shif‐tedtoposition\\, orthe multifunction dis‐play inthe instrument cluster does not showanything, havethevehicle transportedaway(→page 427). Atowingvehicle with liftingequipment isrequiredforvehicle transporta‐tion.
*NOTEDamagedueto towingawayatexcessively high speeds orover long dis‐tances
The drivetrain could be damaged whentow‐ing atexcessively high speeds orover longdistances.
#Atowing speed of 30mph (50 km/h)must not beexceeded.
#Atowing distance of 30 miles (50 km)mustnot beexceeded.
&WARNINGRisk of accident whentowingavehicle which istoo heavy
Ifthevehicle beingtow-started ortowedawayis heavierthanthe permissible grossmass ofyourvehicle,thefollowing situationscan occur:
RThetowingeye may become detached.
RThevehicle/trailer combination mayswerveorevenoverturn.
#If anothervehicle istow-started ortowedaway, itsweight must notexceed
the permissible gross mass ofyourownvehicle.
If avehicle must betow-started ortowedaway,itsweight must notexceedthe permissible grossmass ofthetowingvehicle.
#Information onthe permissible gross mass ofthevehicle can befound onthevehicle iden‐tification plate (→page 466).
#Do not openthe driver's door or frontpassenger door,otherwisethe automatictransmission automatically shiftstoposition].#Installthetowingeye (→page 429).
#Fastenthetow bar.
*NOTEDamageduetoincorrect connec‐tion
#Only connectthetowrope ortow bartothetowingeyes.
#Deactivatethe automatic locking mechanism(→page 68).
426Breakdown assistance

#Do not activatethe HOLD function.
#DeactivateActive Brake Assist (→page 200).
#Shiftthe automatic transmissiontoposition\\.
#Releasethe electric parking brake.
&WARNINGRisk of accident duetolimi‐ted safety-related functions duringthetowing process
Safety-related functions are limited or no lon‐geravailable inthefollowing situations:
Rthe ignition is switched off.
Rthe brake system or powersteering sys‐tem is malfunctioning.
Rthe energy supply orthe on-board electri‐cal system is malfunctioning.
Whenyourvehicle isthentowedaway, signif‐icantly more effortmay berequiredtosteerand brakethan is normallyrequired.
#Use atow bar.
#Make surethatthesteering wheel canmovefreely, beforetowingthevehicleaway.
*NOTEDamageduetoexcessive tractivepower
Ifyou pullawaysharply,the tractive powermay betoo high andthevehicles could bedamaged.
#Pullawayslowly and smoothly.
Loading thevehiclefor transport
#Observethe notes ontowingaway(→page 426).
#Connectthetow bartothetowingeyetoloadthevehicle.
#Shiftthe automatic transmissiontoposition\\.
%The automatic transmission may be lockedin position]intheevent of damagetotheelectrics.Toshiftto\\, providethe on-
board electrical system with power(→page 423).
#Loadthevehicle ontothe transporter.
#Shiftthe automatic transmissiontoposition].
#Usethe electric parking braketosecurethevehicle againstrollingaway.
#Only securethevehiclebythe wheels.
Vehicles with ADS PLUS (Adaptive DampingSystem PLUS)
&WARNINGRisk of an accident whentransportingvehicles withAdaptiveDamping System PLUS
Thereduced dampingforces onthevehiclebeing transported can causethevehicle/trailer combinationtostarttoswing.
As aresult, when transportingvehicles withtheAdaptive Damping System PLUS,thevehicle/trailer combination maystarttoskid.Consequently,you could lose control ofyourvehicle.
#When transporting, ensurethat:
Breakdown assistance427

#Press and hold button1for at leastfiveseconds.Thevehicle is adjustedtothe height ofthelast active drive program. Indicator lamp2goes out.
#Drivethevehicle offthe transporter.
4MATICvehicles
#Make surethatthe front andrear axles cometorestonthe same transportationvehicle.
*NOTEDamagetothe drivetrain duetoincorrect positioning
#Do not positionthevehicle abovetheconnection point ofthe transportvehi‐cle.
Towingeyestoragelocation
Towingeye1is located withthevehicletool kitunderthe trunkfloor.
Installingthetowingeye
#Pressthe mark on cover1inwards andremove.
#Screwinthetowingeyeclockwise asfar as itwill go and tighten.
%Make surethat cover1engages inthebumper whenyouremovethetowingeye.
Breakdown assistance429

*NOTEDamageduetoincorrect use ofthetowingeye
When atowingeye is usedtorecover avehi‐cle,thevehicle may be damaged inthe proc‐ess.
#Only usethetowingeyeto towawayortowstartthevehicle.
Tow-startingthevehicle (emergency enginestart)
*NOTEDamagetothe automatic trans‐mission dueto towstarting
The automatic transmission may be damagedinthe process oftowstartingvehicles withautomatic transmission.
#Vehicles with automatic transmissionmust not betowstarted.
#Vehicles with automatic transmission mustnot betow-started.
Electrical fuses
Notes on electrical fuses
&WARNINGRisk of accident and injurydueto overloaded lines
Ifyou manipulate or bridge afaulty fuse or ifyoureplace it with a fuse with a higheramperage,the electric line could beoverloa‐ded.
This couldresult in afire.
#Alwaysreplacefaulty fuses with speci‐fied new fuses containingthe correctamperage.
*NOTEDamagecausedbyincorrect fuses
Incorrect fuses may cause damagetoelectri‐cal components or systems.
#Only use Mercedes-Benz approvedfuses withthe correct fuserating.
Blown fuses mustbereplaced with fuses ofthesamerating, whichyou canrecognizebythecolor and fuserating. The fuseratings and fur‐
ther informationtobe observed are listed inthefuse assignment diagram.
*NOTEDamageor malfunctions causedbymoisture
Moisture may cause damagetothe electricalsystem or cause ittomalfunction.
#Whenthe fuse box is open, make surethat no moisture can enterthe fusebox.
#When closingthe fuse box, make surethatthe seal ofthe lid is positioned cor‐rectly onthe fuse box.
Ifthe newly inserted fuse also blows, havethecause traced andrectified at aqualified special‐istworkshop, e.g. an authorized Mercedes-BenzCenter.
Ensurethefollowing beforereplacing a fuse:
RThevehicle is secured againstrollingaway
RAll electrical consumers are switched off
RThe ignition is switched off
430Breakdown assistance

Display messagesPossible causes/consequences andPPSolutions
S
Inoperative
*At least one main function ofthe Mercedes me connect system or ofthe SOS emergency call system is malfunc‐tioning.
#Visit aqualified specialistworkshop.
Check Brake Pads SeeOperator's Manual
*The brake pads havereachedthewear limit.
&WARNINGRisk of accident duetorestricted braking power
Whenthe brake pads havereachedtheirwear limit,the braking power may berestricted.
#Drive on carefully.
#Havethe brake systemchecked immediately at aqualified specialistworkshop.
#Visit aqualified specialistworkshop.
Driving systems
Display messagesPossible causes/consequences andPPSolutions
Active Blind Spot Asst. NotAvailable When Towing aTrailer See Operator's Man-ual
*Whenyou establishthe electrical connectiontothe trailer,Active Blind Spot Assistis unavailable.
#Pressthe left-handTouch Control and acknowledgethe display message.
492Display messages andwarning/indicator lamps

Display messagesPossible causes/consequences andPPSolutions
#Ifyou hear scraping sounds, pullover andstopthevehicle safely, paying attentiontoroad and traffic con‐ditions, and set a highervehicle level if possible.
#Do not drive at speeds greaterthan 50mph (80 km/h).
#Visit aqualified specialistworkshop.
Blind Spot Assist Not Avail-able When Towing a TrailerSee Operator's Manual
*Whenyou establishthe electrical connectiontothe trailer, Blind Spot Assist is unavailable.
#Pressthe left-handTouch Control and acknowledgethe display message.

Tow-starting ........................................ 430Towingaway........................................ 426Transportingthevehicle ......................427
Breakdownsee Flat tire
Burmester®high-end 3D surroundsound systemAdjustingthe balance/fader ...............377Adjustingthe sound optimization ........377Adjusting treble, mid-range and basssettings ................................................376Automaticvolume adjustment .............377Calling upthe sound menu ..................376Information ..........................................376Selectingthe sound profile ..................377
Burmester®surround sound system.....375Adjustingthe balance/fader ................376Adjustingthe soundfocus ...................376Adjusting treble, mid-range and basssettings ................................................376Automaticvolume adjustment .............376Calling upthe sound menu ..................375Information ..........................................375
Switchingthe surround sound on/off.............................................................376
ButtonsSteering wheel .................................... 252
C
Call listMaking a call ....................................... 337Overview ............................................. 336
Calling upthe sound menu
Burmester®high-end 3D surroundsound system ......................................376
Burmester®surround sound system ....375
Calls.......................................................... 333Accepting ............................................ 333Activating functions during a call ........ 333Calls withseveral participants .............333Declining ............................................. 333Ending a call ........................................ 333Incoming call during anexisting call .... 334Making ................................................ 333Viatheoverhead control panel(Mercedes me connect) ......................344
Camerasee 360° CameraseeRear view camera
Carkeysee SmartKey
Carwashsee Care
Carwash (care)....................................... 403
Care...........................................................41 0Air-water duct ...................................... 403Automatic carwash ............................. 403Carpet ..................................................41 0Decorativefoil .....................................406Display.................................................41 0EASY-PACK trunk box ...........................410Exterior lighting ................................... 409Headliner .............................................41 0Mattefinish ......................................... 405NightViewAssist................................ 408Paintwork............................................ 405Plastic trim ...........................................41 0Powerwasher ...................................... 404Realwood/trim elements ....................41 0Rear view camera ................................ 409
Index541

Definitions (tires and loading)................451
DesignsMenu (on-board computer) .................. 254
Destination...............................................317Editing intermediatedestinations ........ 306Editingthe previous destinations .........317External ...............................................317Saving (currentvehicle position) ..........317Saving asglobalfavorite......................317Storing a map position .........................317
Destination entry.................................... 302Entering 3wordaddresses .................. 307Entering a POI or address .................... 302Entering an intermediatedestination .. 306Enteringgeo-coordinates ..................... 307Selecting a contact .............................. 307Selecting a POI .................................... 305Selecting fromthe map ....................... 308Selecting previous destinations ...........304
Detecting inattentivenessseeATTENTION ASSIST
Diagnostics connection............................23
Digital Operator's Manual.........................18
Digital speedometer................................ 257
DinghytowingseeTow-bar system
DIRECT SELECT lever...............................17 7Engaging drive position ........................178Engaging neutral ..................................178Engaging parkposition ........................178Engaging parkposition automatically ..178Engagingreversegear .........................178Function ..............................................17 7
DisplayCare .....................................................410
Display (multimedia system)Settings ...............................................287
Display (on-boardcomputer)Displays onthe multifunction display .. 255
Display contentSettingthe additionalvaluerange ....... 254
Displaymessage......................................478Calling up (on-board computer) ...........478Notes ...................................................478
Display messages