ECU MERCEDES-BENZ SLC 2019 Owner's Guide

Display messagesPossible causes/consequences andPPSolutions
Lane KeepingLane KeepingAssist CurrentlyAssist CurrentlyUnavailable SeeUnavailable SeeOperator's ManualOperator's Manual
Lane Keeping Assist is deactivated and temporarily inoperative.
Possible causes are:
Rthe windshield in the camera's field of vision is dirty
Rvisibility is impaired due to heavy rain, snow or fog
Rthere have been no lane markings for an extended period
Rthe lane markings are worn away, dark or covered up, e.g. by dirtor snow
When the causes stated above no longer apply, the display messagedisappears.
Lane Keeping Assist is operational again.
If the display message does not disappear:
XPull over and stop the vehicle safely as soon as possible, payingattention to road and traffic conditions.
XSecure the vehicle against rolling away (Ypage 134).
XClean the windshield.
Lane KeepingLane KeepingAssist InoperativeAssist InoperativeLane Keeping Assist is faulty.
XVisit a qualified specialist workshop.
Blind Spot AssistBlind Spot AssistCurrently Unavaila‐Currently Unavaila‐ble See Operator'sble See Operator'sManualManual
Blind Spot Assist is temporarily inoperative.
Possible causes are:
Rfunction is impaired due to heavy rain or snow
Rthe radar sensor system is outside the operating temperaturerange
Rthe radar sensor system is temporarily inoperative, e.g. due toelectromagnetic radiation emitted by nearby TV or radio stationsor other sources of electromagnetic radiation
The yellowcindicator lamps also light up in the exterior mirrors.
When the causes stated above no longer apply, the display messagedisappears.
Blind Spot Assist is operational again.
If the display message does not disappear:
XPull over and stop the vehicle safely as soon as possible, payingattention to road and traffic conditions.
XSecure the vehicle against rolling away (Ypage 134).
XClean the sensors (Ypage 250).
XRestart the engine.
Blind Spot AssistBlind Spot AssistInoperativeInoperativeBlind Spot Assist is malfunctioning.
The yellowcindicator lamps also light up in the exterior mirrors.
XVisit a qualified specialist workshop.
198Displaymessages
On-b oard computer and displays

Display messagesPossible causes/consequences andPPSolutions
Active DistanceActive DistanceAssist CurrentlyAssist CurrentlyUnavailable SeeUnavailable SeeOperator's ManualOperator's Manual
Active Distance Assist DISTRONIC is temporarily inoperative.
Possible causes are:
Rthe radar sensor system is temporarily inoperative, e.g. due toelectromagnetic radiation emitted by nearby TV or radio stationsor other sources of electromagnetic radiation
Rthe system is outside the operating temperature range
Rthe on-board voltage is too low
A warning tone also sounds.
When the causes stated above no longer apply, the display messagedisappears.
Active Distance Assist DISTRONIC is operational again.
If the display message does not disappear:
XPull over and stop the vehicle safely as soon as possible, payingattention to road and traffic conditions.
XSecure the vehicle against rolling away (Ypage 134).
XRestart the engine.
Active DistanceActive DistanceAssist InoperativeAssist InoperativeActive Distance Assist DISTRONIC is faulty.
A warning tone also sounds.
XVisit a qualified specialist workshop.
Act. DistanceAct. DistanceAssist SuspendedAssist SuspendedYou have depressed the accelerator pedal. Active Distance AssistDISTRONIC is no longer controlling the speed of the vehicle.
XRemove your foot from the accelerator pedal.
Distance Assist--Distance Assist--- mph- mphA condition for activating Active Distance Assist DISTRONIC has notbeen met.
XCheck the activation conditions for Active Distance AssistDISTRONIC (Ypage 144).
Cruise Control OffCruise Control OffCruise control has been deactivated.
If a warning tone also sounds, cruise control has deactivated auto-matically (Ypage 142).
Cruise Control - -Cruise Control - -- mph- mphCruise control cannot be activated, since not all of the activationconditions have been met.
XCheck the activation conditions for cruise control (Ypage 142).
Cruise ControlCruise ControlInoperativeInoperativeCruise control is malfunctioning.
A warning tone also sounds.
XVisit a qualified specialist workshop.
200Display messages
On-board computer and displays

Tires
Display messagesPossible causes/consequences andPPSolutions
Check Tire Pres‐Check Tire Pres‐sure Soonsure SoonCanada only:
The tire pressure loss warning system has detected a significantloss in pressure.
A warning tone also sounds.
Possible causes:
Ryou have changed the positions of the wheels and tires or instal-led new wheels and tires
Rthe tire pressure in one or more tires has dropped
GWARNING
Tire pressures that are too low pose the following hazards:
Rthey may burst, especially as the load and vehicle speed increase
Rthey may wear excessively and/or unevenly, which may greatlyimpair tire traction.
Rthe driving characteristics, as well as steering and braking, maybe greatly impaired
There is a risk of an accident.
XStop the vehicle without making any sudden steering or brakingmaneuvers. Pay attention to the traffic conditions as you do so.
XSecure the vehicle against rolling away (Ypage 134).
XCheck the tires and, if necessary, follow the instructions for a flattire (Ypage 252).
XCheck the tire pressures and, if necessary, correct the tire pres-sure.
XRestart the tire pressure loss warning system when the tire pres-sure is correct (Ypage 274).
Check Tire Pres‐Check Tire Pres‐sure Then Restartsure Then RestartRun Flat IndicatorRun Flat Indicator
Canada only:
The tire pressure loss warning system generated a display messageand has not been restarted since.
XSet the correct tire pressure in all four tires.
XRestart the tire pressure loss warning system (Ypage 274).
Run Flat IndicatorRun Flat IndicatorInoperativeInoperativeCanada only:
The tire pressure loss warning system is faulty.
XVisit a qualified specialist workshop.
Please CorrectPlease CorrectTire PressureTire PressureUSA only:
The tire pressure is too low in at least one of the tires, or the tirepressure difference between the wheels is too great.
XCheck the tire pressures at the next opportunity (Ypage 274).
XIf necessary, correct the tire pressure.
XRestart the tire pressure monitor (Ypage 277).
Displaymessages201
On-b oard computer and displays
Z

Display messagesPossible causes/consequences andPPSolutions
Tire Pressure SoonTire Pressure SoonThe tire pressure in one or more tires has dropped significantly. Thewheel position is shown in the multifunction display.
A warning tone also sounds.
GWARNING
Tire pressures that are too low pose the following hazards:
Rthey may burst, especially as the load and vehicle speed increase
Rthey may wear excessively and/or unevenly, which may greatlyimpair tire traction.
Rthe driving characteristics, as well as steering and braking, maybe greatly impaired
There is a risk of an accident.
XStop the vehicle without making any sudden steering or brakingmaneuvers. Pay attention to the traffic conditions as you do so.
XSecure the vehicle against rolling away (Ypage 134).
XCheck the tires and, if necessary, follow the instructions for a flattire (Ypage 252).
XCheck the tire pressure (Ypage 274).
XIf necessary, correct the tire pressure.
Warning Tire Mal‐Warning Tire Mal‐functionfunctionThe tire pressure in one or more tires has dropped suddenly. Thewheel position is shown in the multifunction display.
GWARNING
Driving with a flat tire poses a risk of the following hazards:
Ra flat tire affects the ability to steer or brake the vehicle
Ryou could lose control of the vehicle.
Rcontinued driving with a flat tire will cause excessive heat build-up and possibly a fire
There is a risk of an accident.
XStop the vehicle without making any sudden steering or brakingmaneuvers. Pay attention to the traffic conditions as you do so.
XSecure the vehicle against rolling away (Ypage 134).
XCheck the tires and, if necessary, follow the instructions for a flattire (Ypage 252).
Tire Press. Moni‐Tire Press. Moni‐tor Currentlytor CurrentlyUnavailableUnavailable
Because there is interference from a strong source of radio waves,no signals from the tire pressure sensors are detected. The tirepressure monitor is temporarily malfunctioning.
XDrive on.The tire pressure monitor restarts automatically as soon as theproblem has been resolved.
TirePress. Sen‐TirePress. Sen‐sor(s) Missingsor(s) MissingThere is no signal from the tire pressure sensor of one or severalwheels. The pressure of the affected tire does not appear in themultifunction display.
XHave the faulty tire pressure sensor replaced at a qualified spe-cialist workshop.
202Displaymessages
On-b oard computer and displays

Display messagesPossible causes/consequences andPPSolutions
Service RequiredService RequiredDo Not Shift GearsDo Not Shift GearsVisit DealerVisit Dealer
You cannot change the transmission position due to a malfunction.
A warning tone also sounds.
If transmission position[is selected:
XDrive to a qualified specialist workshop without shifting the trans-mission from position[.
If position^,\\or]is selected:
XNotify a qualified specialist workshop or breakdown service.
Reversing Not Pos‐Reversing Not Pos‐sible Servicesible ServiceRequiredRequired
You can no longer shift to transmission position^due to a mal-function.
Transmission positions],\\or[continue to be available.
A warning tone also sounds.
XVisit a qualified specialist workshop.
Transmission Mal‐Transmission Mal‐function Stopfunction StopA malfunction has occurred in the mechanical transmission compo-nents.
A warning tone also sounds. The transmission shifts automaticallyto position\\.
XPull over and stop the vehicle safely as soon as possible, payingattention to road and traffic conditions.
XShift the transmission to position].
XSecure the vehicle against rolling away (Ypage 134).
XNotify a qualified specialist workshop or breakdown service.
Stop Vehicle LeaveStop Vehicle LeaveEngine RunningEngine RunningWait TransmissionWait TransmissionCoolingCooling
The transmission has overheated. Pulling away can be temporarilyimpaired or not possible.
XPull over and stop the vehicle safely as soon as possible, payingattention to road and traffic conditions. Do not continue drivingunder any circumstances.
XWait until the display message disappears before pulling away.
Auxiliary BatteryAuxiliary BatteryMalfunctionMalfunctionThe auxiliary battery for the automatic transmission is no longerbeing charged.
XVisit a qualified specialist workshop at the next opportunity.
XUntil then, always shift the transmission to position]beforeyou switch off the engine.
XBefore leaving the vehicle, apply the electric parking brake.

Safety systems
Warning/indicatorlamp
QQSignal type
Possible causes/consequences andPPSolutions
'MQ'(USA only) orM(Canada only): the red brake system warning lampis lit while the engine is running. A warning tone also sounds.
GWARNING
There is not enough brake fluid in the brake fluid reservoir.
The braking effect may be impaired.
There is a risk of an accident.
XPull over and stop the vehicle safely as soon as possible, paying attention toroad and traffic conditions. Do not continue driving under any circumstances.
XSecure the vehicle against rolling away (Ypage 134).
XDo not add brake fluid. Adding more will not correct the malfunction.
XConsult a qualified specialist workshop.
XObserve the additional display messages in the multifunction display.
'QUSA only: the red brake system warning lamp is lit while the engine is run-ning. The multifunction display also shows a display message with the&symbol.
The brake pads/linings have reached their wear limit.
XVisit a qualified specialist workshop.
%QThe yellow ABS warning lamp is lit while the engine is running.
ABS (anti-lock braking system) is malfunctioning.
If there is an additional warning tone, the EBD (electronic brake force distribu-tion) is malfunctioning.
Other driving systems and driving safety systems may also malfunction.
GWARNING
The brake system continues to function normally, but without the functions lis-ted above. The front and rear wheels could therefore lock if you perform a fullbrake application, for example.
The steerability and braking characteristics may be severely affected. The brak-ing distance in an emergency braking situation can increase.
If ESP®is not operational, ESP®is unable to stabilize the vehicle.
There is an increased risk of skidding and an accident.
XObserve the additional display messages in the multifunction display.
XDrive on carefully.
XVisit a qualified specialist workshop immediately.
If the ABS control unit is defective, there is also a possibility that other systems,such as the navigation system or the automatic transmission, will not be availa-ble.
210Warning and indicator lamps
On-board computer and displays

Tires
Warning/indicatorlamp
QQSignal type
Possible causes/consequences andPPSolutions
wQThe yellow tire pressure monitor warning lamp (pressure loss/malfunction) islit.
The tire pressure monitor has detected a loss of pressure in at least one of thetires.
GWARNING
Tire pressures that are too low pose the following hazards:
Rthey may burst, especially as the load and vehicle speed increase
Rthey may wear excessively and/or unevenly, which may greatly impair tiretraction.
Rthe driving characteristics, as well as steering and braking, may be greatlyimpaired
There is a risk of an accident.
XStop the vehicle without making any sudden steering or braking maneuvers.Pay attention to the traffic conditions as you do so.
XSecure the vehicle against rolling away (Ypage 134).
XObserve the additional display messages in the multifunction display.
XCheck the tires and, if necessary, follow the instructions for a flat tire(Ypage 252).
XCheck the tire pressure (Ypage 274).
XIf necessary, correct the tire pressure.
wQThe yellow tire pressure monitor warning lamp (pressure loss/malfunction)flashes for approximately one minute and then remains lit.
The tire pressure monitor is faulty.
GWARNING
The system is possibly unable to recognize or register low tire pressure.
There is a risk of an accident.
XObserve the additional display messages in the multifunction display.
XVisit a qualified specialist workshop immediately.
216Warning and indicator lamps
On-board computer and displays

Connecting a mobile phone
(COMAND)
Requirements
For telephony via the Bluetooth®interface, you
require a Bluetooth®-capable mobile phone.The mobile phone must support Hands-FreeProfile 1.0 or above.
Multimedia system:
XSelectVehicleVehicle{System Set‐System Set‐tingstings{Activate BluetoothActivate Bluetooth.
XActivate Bluetooth®s.
Mobile phone:
XActivate Bluetooth®and, if necessary, Blue-
tooth®visibility for other devices (see themanufacturer's operating instructions).
The Bluetooth®device names for all of onemanufacturer's products might be identical. Tomake it possible to clearly identify your mobilephone, change the device name (see the man-ufacturer's operating instructions).
If the mobile phone supports the PBAP (PhoneBookAccessProfile) and MAP (Message
AccessProfile) Bluetooth®profiles, the follow-ing information will be transmitted after youconnect:
RPhone book
RCall lists
RText messages and e-mail
iFurther information on suitable mobilephones can be found at:http://www.mercedes-benz.com/connect
iIn the USA, you can get in touch with theMercedes-Benz Customer Assistance Centeron 1-800-FOR-MERCedes(1-800-367-6372).
In Canada, you can get in touch with theCustomer Relations Center on1-800-387-0100.
Searching for and authorizing (con-
necting) a mobile phone
Before using your mobile phone with the multi-media system for the first time, you will needto search for the phone and then authorize(connect) it. Depending on the mobile phone,authorization either takes place by means of
Secure Simple Pairing or by entering a pass-key. The multimedia system automaticallymakes the procedure that is relevant for yourmobile phone available. The mobile phone isalways connected automatically after authori-zation. Further information on using a mobilephone with the multimedia system (see theDigital Operator's Manual).
If the multimedia system does not detect yourmobile phone, this may be due to particularsecurity settings on your mobile phone (seethe manufacturer's operating instructions).
Only one mobile phone can be connected tothe multimedia system at any one time.
Searching for a mobile phone
Multimedia system:
XSelectTel/Tel/

Authorization by entering a passkey (pass-code):
XSelect the Bluetooth®name of the mobilephone.The input menu for the passkey is displayed.
XChoose a one to sixteen-digit number com-bination as a passkey.
XEnter the passkey on the multimedia sys-tem.
XPressTto confirm.
XEnter and confirm the passkey on themobile phone. Depending on the mobilephone used, confirm the connection to themultimedia system and for the PBAP and
MAP Bluetooth®profiles. The prompt toconfirm may take up to two minutes to bedisplayed (see the manufacturer's operatinginstructions).
Connecting a mobile phone (Audio
20)
Requirements
For telephony via the Bluetooth®interface, you
require at least one Bluetooth®-capable mobilephone depending on use ofone-telephonemodeortwo-telephone mode. The mobilephone must support Hands-Free Profile 1.0 orabove.
Intwo-telephone modeyou can use all thefunctions of the multimedia system with themain telephone. With theadditional tele-phone, you can receive incoming calls.
Multimedia system:
XSelectVehicleVehicle{System Set‐System Set‐tingstings{Activate BluetoothActivate Bluetooth.
XActivate Bluetooth®s.
Mobile phone:
XActivate Bluetooth®and, if necessary, Blue-
tooth®visibility for other devices (see themanufacturer's operating instructions).
The Bluetooth®device names for all of onemanufacturer's products might be identical. Tomake it possible to clearly identify your mobilephone, change the device name (see the man-ufacturer's operating instructions).
If the mobile phone supports the PBAP (PhoneBookAccessProfile) and MAP (Message
AccessProfile) Bluetooth®profiles, the follow-ing information is transmitted after you con-nect the main telephone:
RPhone book
RCall lists
RText messages and e-mail
iFurther information on suitable mobilephones can be found at:http://www.mercedes-benz.com/connect
iIn the USA, you can get in touch with theMercedes-Benz Customer Assistance Centeron 1-800-FOR-MERCedes(1-800-367-6372).
In Canada, you can get in touch with theCustomer Relations Center on1-800-387-0100.
Searching for and authorizing (con-
necting) a mobile phone
Before using your mobile phone with the multi-media system for the first time, you will needto search for the phone and then authorize(connect) it. Depending on the mobile phone,authorization either takes place by means ofSecure Simple Pairing or by entering a pass-key. The multimedia system automaticallymakes the procedure that is relevant for yourmobile phone available. The mobile phone isalways connected automatically after authori-zation. Further information on using a mobilephone with the multimedia system (see theDigital Operator's Manual).
If the multimedia system does not detect yourmobile phone, this may be due to particularsecurity settings on your mobile phone (seethe manufacturer's operating instructions).
Searching for a mobile phone
Multimedia system:
XSelectTel/Tel/

Connecting a mobile phone
XOne-telephone mode:selectConnect asConnect as
New Main PhoneNew Main Phone.
XTwo-telephone mode:selectConnect asConnect as
Additional PhoneAdditional Phonewhen a mobile phone isalready connected.
XAuthorization using Secure Simple Pair-ing:
A code is displayed in the multimedia sys-tem and on the mobile phone.
XConfirm code on the mobile phone. Depend-ing on the mobile phone used, confirm theconnection to the multimedia system and
for the PBAP and MAP Bluetooth®profiles.The prompt to confirm may take up to twominutes to be displayed (see the manufac-turer's operating instructions).
XIf the codes are different: selectNoNoon themultimedia system.The process is canceled.
Repeat authorization.
or
XAuthorization by entering a passkey(passcode):enter any one- to sixteen-digitnumber sequence which you have chosenyourself into the passkey input menu.
XPressTto confirm.
XEnter and confirm the passkey on themobile phone. Depending on the mobilephone used, confirm the connection to themultimedia system and for the PBAP and
MAP Bluetooth®profiles. The prompt toconfirm may take up to two minutes to bedisplayed (see the manufacturer's operatinginstructions).
Symbols in the device manager
The symbols are shown in color depending ontheir use.
SymbolExplanation
Mobile phone connected to themultimedia system
Main telephone with full range offunctions
Additional telephone for incom-ing calls in two telephone mode
Media mode
General notes
If you wish to play external media sources, theappropriate media mode must already beturned on. Further information on media mode(see the Digital Operator's Manual).
The following external media sources can beused:
RApple®devices (e.g. iPhone®)
RUSB devices (e.g. USB stick, MP3 player)(Ypage 224)
RCD
RDVD (COMAND)
RSD cards
RVia devices connected by Bluetooth®
iInformation on single CD/DVD drive orDVD changer (see the Digital Operator'sManual).
Selecting using the device list
Multimedia system:
XSelectMediaMedia{DevicesDevices.The available media sources will be shown.The;dot indicates the current setting.
XSelect the media source.Playable files are played.
Inserting/removing an SD card
Important safety notes
GWARNING
SD cards are small parts. They can be swal-
lowed and cause choking. This poses an
increased risk of injury or even fatal injury.
Keep the SD card out of the reach of chil-
dren. If a SD card is swallowed, seek medi-
cal attention immediately.
!If the SD card is no longer in use, youshould take it out and remove it from thevehicle. High temperatures can damage thecard.
Operating system223
Multimedia system
Z