message MERCEDES-BENZ B-Class 2017 W246 Manual Online

Have the system checked at the nearest
Mercedes-Benz Service Center or contact the
following service hotlines:
Mercedes-Benz Customer Assistance Center at
1-800-FOR-MERCede s (1-800-367-6372) or
1-866-990-9007
Emergency call Important safety notes
G
WARNING
It can be dangerous to remain in the vehicle,
even if you have pressed the SOS button in an emergency if:
R you see smoke inside or outside of the vehi-
cle, e.g. if there is a fire after an accident
R the vehicle is on a dangerous section of
road
R the vehicle is not visible or cannot easily be
seen by other road users, particularly whendark or in poor visibility conditions
There is a risk of an accident and injury.
Leave the vehicle immediately in this or simi-
lar situations as soon as it is safe to do so.
Move to a safe location along with other vehi-
cle occupants. In such situations, secure the
vehicle in accordance with national regula-
tions, e. g. with a warning triangle.
General notes
Observe the notes on system activation
(Y page 219).
An emergency call is dialed automatically if an
air bag or Emergency Tensioning Device is trig-
gered. You cannot end an automatically trig-
gered emergency call yourself.
An emergency call can also be initiated man-
ually.
As soon as the emergency call has been initi-
ated, the indicator lamp in the SOS button
flashes. The Connecting Call
Connecting Call message
appears in the multifunction display.
The audio output is muted.
Once the connection has been made, the Call Call
Connected
Connected message appears in the multifunc-
tion display. All important information on the emergency is
transmitted, for example:
R current location of the vehicle (as determined
by the GPS system)
R vehicle identification number
R information on the severity of the accident
Shortly after the emergency call has been initi-
ated, a voice connection is automatically estab- lished between the Customer Assistance Center
and the vehicle occupants.
R If the vehicle occupants respond, the
Mercedes-Benz Customer Assistance Center
attempts to get more information on the
emergency.
R If there is no response from the vehicle occu-
pants, an ambulance is immediately sent to
the vehicle.
If no voice connection can be established to the
Mercedes-Benz Customer Assistance Center,
the system has been unable to initiate an emer- gency call.
This can occur, for example, if the relevant
mobile phone network is not available. The indi-cator lamp in the SOS button flashes continu-
ously.
The Call Failed Call Failed message appears in the mul-
tifunction display and must be confirmed.
In this case, summon assistance by other
means.
Making an emergency call X
To initiate an emergency call manually:
press cover 0043briefly to open.
X Press and hold the SOS button for at least one
second 0044.
The indicator lamp in SOS button 0044flashes
until the emergency call is concluded.
X Wait for a voice connection to the Mercedes-
Benz Customer Assistance Center. 220
FeaturesSto
wage an d features

X
To end a call: press the0076button on the
multifunction steering wheel.
or X Press the corresponding multimedia system
button for ending a phone call.
X After the emergency call, close cover 0043.
If the mobile phone network is unavailable,
mbrace will not be able to make the emergency
call. If you leave the vehicle immediately after
pressing SOS button 0044, you do not know if
mbrace has successfully made the emergency
call. In this case, always summon assistance by other means.
Roadside Assistance button X
To make a call: press Roadside assistance
call button 0043.
This initiates a call to the Mercedes-Benz Cus-
tomer Assistance Center.
The indicator lamp in Roadside assistanc but- ton 0043flashes while the call is active. The
Connecting Call
Connecting Call message appears on the
multifunction display. The audio output is
muted.
If a connection can be established, the Call
Call
Connected Connected message appears in the multifunc-
tion display.
If a mobile phone network and GPS reception
are available, the system transfers data to the
Mercedes-Benz Customer Assistance Center,
for example:
R current location of the vehicle
R vehicle identification number
The display of the multimedia system indicates
that a call is active. During the call, you can
change to the navigation menu by pressing the
NAVI button on the multimedia system, for
example.
Voice output is not available in this case. A voice connection is established between the
Mercedes-Benz Customer Assistance Center
and the vehicle occupants.
From the remote malfunction diagnosis, the
Mercedes-Benz Customer Assistance Center
can ascertain the nature of the problem
(Y
page 224).
The Mercedes-Benz Customer Assistance Cen-
ter either sends a qualified Mercedes-Benz tech-
nician or makes arrangements for your vehicle
to be transported to the nearest Mercedes-Benz
Service Center.
You may be charged for services such as repair work and/or towing.
You can find more information in the separate
mbrace manual.
The system has not been able to initiate a Road-
side assistance call, if:
R the 0052 indicator lamp for the Roadside
assistance call button is flashing continu-
ously.
R no voice connection to the Mercedes-Benz
Customer Assistance Center was estab-
lished.
This can occur if the relevant mobile phone net- work is not available, for example.
The Call Call Failed
Failed message appears on the mul-
tifunction display.
X To end a call: press the0076button on the
multifunction steering wheel.
or X Press the corresponding multimedia system
button for ending a phone call.
MB Info call button X
To make a call: press MB Info call button 0043.
This initiates a call to the Mercedes-Benz Cus-
tomer Assistance Center. Features
221Stowage an d features Z

The indicator lamp in MB Info call button
0043
flashes while the connection is being made.
The Connecting Call
Connecting Call message appears on
the multifunction display. The audio output is
muted.
If a connection can be established, the Call
Call
Connected Connected message appears in the multifunc-
tion display.
If a mobile phone network and GPS reception
are available, the system transfers data to the
Mercedes-Benz Customer Assistance Center,
for example:
R current location of the vehicle
R vehicle identification number
The display of the multimedia system indicates
that a call is active. During the call, you can
change to the navigation menu by pressing the
NAVI button on the multimedia system, for
example.
Voice output is not available in this case.
A voice connection is established between the
Mercedes-Benz Customer Assistance Center
and the vehicle occupants.
You receive information about operating your
vehicle, about the nearest Mercedes-Benz Ser-
vice Center and about other products and serv- ices from Mercedes-Benz.
You can find further information on the mbrace
system under "Owners Online" at http://
www.mbusa.com.
The system has not been able to initiate an MB
Info call, if:
R the indicator lamp in MB Info call button 00D9
is flashing continuously.
R no voice connection to the Mercedes-Benz
Customer Assistance Center was estab-
lished.
This can occur if the relevant mobile phone net-
work is not available, for example.
The Call
Call Failed Failed message appears on the mul-
tifunction display.
X To end a call: press the0076button on the
multifunction steering wheel.
or X Press the corresponding multimedia system
button for ending a phone call. Call priority When service calls are active, e.g. Roadside
Assistance or MB Info calls, an emergency call
can still be initiated. In this case, an emergency
call will take priority and override all other active
calls.
The indicator lamp of the respective button
flashes until the call is ended.
An emergency call can only be terminated by the
Mercedes-Benz Customer Assistance Center.
All other calls can be ended by pressing:
R the 0076 button on the multifunction steering
wheel
R the corresponding button in the multimedia
system to end the voice call
When a call is initiated, the audio system is
muted.
The mobile phone is no longer connected to the
multimedia system.
However, if you want to use your mobile phone, do so only when the vehicle is stationary and ina safe location.
Downloading destinations Downloading destinations
Downloading destinations gives you access to a database with over 15 million points of interest(POIs). These can be downloaded on the navi-
gation system in your vehicle. If you know the
destination, the address can be downloaded.
Alternatively, you can obtain the location of
Points of Interest (POIs)/important destinationsin the vicinity.
Furthermore, you can download routes with up
to four way points.
You are prompted to confirm route guidance to
the address entered.
X SelectYes Yesby turning 3or sliding 1
the controller and confirm with 7.
The system calculates the route and subse-
quently starts the route guidance with the
address entered.
If you select No Nothe address can be stored in
the address book. 222
FeaturesStowage and features

The destination download function is available
if:
R the vehicle is equipped with a navigation sys-
tem.
R the relevant mobile phone network is availa-
ble and data transfer is possible.
Route Assistance This service is part of the mbrace PLUS Packageand cannot be purchased separately.
You can use the Route Assistance function even
if the vehicle is not equipped with a navigation
system.
Within the framework of this service, you receive a professional and reliable form of navigation
support without having to leave your vehicle.
The customer service representative finds a
suitable route depending on your vehicle's cur-
rent position and the desired destination. You
will then be guided live through the current route section.
Search & Send General notes
To use "Search & Send", your vehicle must be
equipped with mbrace and a navigation system. Additionally, an mbrace service subscription
must be completed.
"Search & Send" is a destination entry service. A
destination address found on Google Maps™
can be transferred via mbrace directly to your
vehicle's navigation system.
Specifying and sending the destination
address
X Go to the website http://maps.google.com
and enter a destination address into the entry
field.
X To send the destination address to the e-
mail address of your mbrace account:
click on the corresponding button on the web-
site.
Example:
If you select 'Send to vehicle' and then
'Mercedes-Benz', the destination address will be sent to your vehicle.
X When the "Send" dialog window appears: Enter the e-mail address you specified when
setting up your mbrace account into the cor-
responding field.
X Click "Send".
Information on specific commands such as
"Address entry" or "Send" can be found on the
website.
Calling up a transmitted destination
address
X Turn the SmartKey to position 2in the ignition
lock (Y page 109).
The transmitted destination address is loaded into the vehicle's navigation system.
A display message appears, asking whether
navigation should be started.
X SelectYes Yesby turning 3or sliding 1
the controller and confirm with 7.
The system calculates the route and subse-
quently starts the route guidance with the
address entered.
If you select No Nothe address can be stored in
the address book.
If you have sent more than one destination
address, each individual destination must be
confirmed separately.
Destination addresses are loaded in the same
order as the order in which they were sent.
If you own multiple Mercedes-Benz vehicles with
mbrace and activated mbrace accounts:
If multiple vehicles are registered under the
same e-mail address, the destination will be
sent to all the vehicles.
Vehicle remote opening You can use the vehicle remote opening if you
have unintentionally locked your vehicle and a
replacement SmartKey is not available.
The vehicle can be opened by the Mercedes-
Benz Customer Assistance Center.
The vehicle can be immediately opened
remotely within four days of the ignition being
turned off. After this time, the remote unlocking
may be delayed by 15 to 60 minutes. After
30 days, the vehicle can no longer be opened
remotely.
The vehicle remote unlocking feature is availa-
ble if the relevant mobile phone network is avail- able and a data connection is possible.
X Contact the following service hotlines: Features
223Stowage and features Z

Mercedes-Benz Customer Assistance Center
at 1-800-FOR-MERCedes (1-800-367-6372)
or 1-866-990-9007
You will be asked for your password.
X Return to your vehicle at the time agreed upon
with the Mercedes-Benz Customer Assis-
tance Center.
Alternatively, the vehicle can be opened via:
R the Internet, under the "Owners Online" sec-
tion
R telephone applications (e.g. for iPhone ®
,
Android™)
To do this, you will need your identification num-
ber and password.
Vehicle remote closing The vehicle remote-closing feature can be used
when you have forgotten to lock the vehicle and
you are no longer nearby.
The vehicle can then be locked by the Mercedes-
Benz Customer Assistance Center.
The vehicle can be immediately remotely locked within four days of the ignition being turned off.
After this time, remote closing may be delayed
by 15 to 60 minutes. After 30 days the vehicle
can no longer be valet locked remotely.
The vehicle remote closing feature is available if the relevant mobile phone network is available
and a data connection is possible.
X Contact the following service hotlines:
Mercedes-Benz Customer Assistance Center
at 1-800-FOR-MERCedes (1-800-367-6372)
or 1-866-990-9007
You will be asked for your password.
The next time you are inside the vehicle and you switch on the ignition, the Doors Locked
Doors Locked
Remotely Remotely message appears in the multifunction
display.
Alternatively, the vehicle can be locked via:
R the Internet, under the "Owners Online" sec-
tion
R telephone applications (e.g. for iPhone ®
,
Android™)
To do this, you will need your identification num- ber and password. Stolen vehicle recovery service If your vehicle has been stolen:
X Notify the police.
The police will issue a numbered incident
report.
X This number will be forwarded to the
Mercedes-Benz Customer Assistance Center
together with your PIN.
The Mercedes-Benz Customer Assistance
Center then tries to locate the system. The
Mercedes-Benz Customer Assistance Center
contacts you and the local law enforcement
agency if the vehicle is located.
However, only the law enforcement agency is informed of the location of the vehicle.
If the anti-theft alarm system is activated for
longer than 30 seconds, the Mercedes-Benz
Customer Assistance Center is automatically
notified.
Vehicle Health Check With the Vehicle Health Check, the Customer
Assistance Center can provide improved sup-
port for problems with your vehicle. During an
existing call, vehicle data is transferred to the
Customer Assistance Center.
The customer service representative can use
the received data to decide what kind of assis-
tance is required. You are then, for example,
guided to the nearest Mercedes-Benz Service
Center or a recovery vehicle is called.
If vehicle data needs to be transferred during an MB Info call or a Roadside Assistance call, this is
initiated by the Customer Assistance Center.
The Roadside Assistance Connected Roadside Assistance Connected mes-
sage appears in the display. If the Vehicle Health
Check can be started, the Request
Requestfor
forVehi‐
Vehi‐
cle Diagnostics Received Start vehi‐
cle Diagnostics Received Start vehi‐
cle diagnostics? cle diagnostics? message appears in the
display.
X Press the Yes
Yesbutton to confirm the message.
X When the Vehicle Diagnostics Please
Vehicle Diagnostics Please
Start Ignition
Start Ignition message appears: turn the
SmartKey to position 2in the ignition lock
(Y page 109).
X If the Please follow the instructions
Please follow the instructions
received
received by
byphone
phone and
andmove
move your
yourvehi‐
vehi‐
cle to a safe position.
cle to a safe position. message
appears: please follow the instructions 224
FeaturesStowage and features

received by phone and move your vehicle to a
safe position.
The message in the display disappears.
The vehicle operating state check begins.
During this procedure, you will see the Vehi‐
Vehi‐
cle Diagnostics Active cle Diagnostics Active message.
If you select Cancel
Cancel, the Vehicle Health
Check is canceled completely.
When the check is complete, the Sending
Sending
vehicle diagnostics data. (Voice con‐
vehicle diagnostics data. (Voice con‐
nection may be interrupted during nection may be interrupted during
data data transfer)
transfer) message appears. The vehicle
data can now be sent.
X Press the OK
OK button to confirm the message.
The voice connection with the Customer
Assistance Center is terminated.
The Vehicle Diagnostics: Transfer‐ Vehicle Diagnostics: Transfer‐
ring Data...
ring Data... message appears.
The vehicle data is sent to the Customer
Assistance 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 a
later time by another means, e.g. by e-mail or
phone.
Another function of the Vehicle Health Check is
the transfer of service data to the Customer
Assistance Center. If a service is due, the display shows a message to this effect together with
information about any special offers at your
workshop.
This information can also be called up under
"Owners Online" at http://www.mbusa.com.
Information on the data stored in the vehicle
(Y page 28).
Information on Roadside Assistance
(Y page 24).
Downloading routes Downloading routes allows you to transfer and
save predefined routes in the navigation sys-
tem.
A route can be prepared and sent by either a
customer service representative or under "Own- ers Online" at http://www.mbusa.com.
Each route can include up to four way points.
Once a route has been received by the naviga-
tion system, you will see the Do
Do you you want
want to
to
start route guidance? Destination start route guidance? Destination
Received destination has been saved Received destination has been saved in "Previous destinations". in "Previous destinations".
message on
the multimedia system display.
The route is saved.
X To start route guidance: selectYes Yes.
An overview of the route is shown in the dis-
play.
If you select No No, the saved route can be called
up later in the navigation menu.
X Select Start
Start.
Route guidance starts.
Downloaded and saved routes can be called up again.
Speed alert You can define the upper speed limit, which
must not be exceeded by the vehicle.
If this selected speed is exceeded by the vehicle,
a message will be sent to the Customer Assis-
tance Center. The Customer Assistance Center
then forwards this information to you.
You can select the way in which you receive this information beforehand. Possible options
include text message, e-mail or an automated
call.
The data you receive contains the following
information:
R the location where the speed limit was excee-
ded
R the time at which the speed limit was excee-
ded
R the selected speed limit which was exceeded
Geo fencing Geo fencing allows you to select areas which the
vehicle should not enter or leave. You will be
informed if the vehicle crosses the boundaries
of the selected areas. You can select the way inwhich you receive this information beforehand.
Possible options include text message, e-mail or
an automated call.
The area can be determined as either a circle or a polygon with a maximum of ten corners. You
can specify up to ten areas simultaneously. Dif- ferent settings are possible for each area.
These settings can be called up under "Owners
Online" at http://www.mbusa.com.
Alternatively, you can trigger an MB Info call and
inform the customer service representative that
you wish to activate geo fencing. Features
225Stowage and features Z

Currently inactive areas can be activated by text
message.
Triggering the vehicle alarm With this function, you can trigger the vehicle's
panic alarm via text message. An alarm sounds
and the exterior lighting flashes. Depending on
the setting, the panic alarm lasts five or ten sec-
onds. Afterwards, the alarm switches off. Garage door opener
General notes The HomeLink
®
garage door opener integrated
in the rear-view mirror allows you to operate up to three different door and gate systems.
Use the integrated garage door opener only on
garage doors that:
R have safety stop and reverse features and
R meet current U.S. federal safety standards
Once programed, the integrated garage door
opener in the rear-view mirror will assume the
function of the garage door system's remote
control. 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 not leave the engine running while programming.
Certain garage door drives are incompatible
with the integrated garage door opener. If you
have difficulty programing the integrated garage
door opener, contact a Mercedes-Benz Service
Center.
Alternatively, you can call the following tele-
phone assistance services:
R USA: Mercedes-Benz Customer Assistance
Center at 1-800-FOR-MERCedes
R Canada: Customer Service at
1-800-387-0100
R HomeLink ®
hotline 1-800-355-3515 (free of
charge)
More information on HomeLink ®
and/or com-
patible products is also available online at
http://www.homelink.co m.
Notes on the declaration of conformity
(Y page 26).
USA: FCC ID: CB2HMIHL4
Canada: IC: 279B-HMIHL4 Important safety notes G
WARNING
When you operate or program the garage door with the integrated garage door opener, per-
sons in the range of movement of the garage
door can become trapped or struck by the
garage door. There is a risk of injury.
When using the integrated garage door
opener, always make sure that nobody is
within the range of movement of the garage
door.
Programming Programming the buttons
Pay attention to the "Important safety notes"
(Y page 226). Garage door remote control
0083is not included
with the integrated garage door opener.
X Turn the SmartKey to position 2in the ignition
lock (Y page 109).
X Select one of buttons 0044to0085 to control the
garage door drive.
X To start program mode: press and hold one
of buttons 0044to0085 on the integrated garage
door opener.
The garage door opener is now in program
mode. After a short time, indicator lamp 0043
lights up yellow.
Indicator lamp 0043lights up yellow as soon as
button 0044,0087or0085 is stored for the first time.
If the selected button has already been pro-
gramed, indicator lamp 0043will only light up
yellow after ten seconds have elapsed.
X Release button 0044,0087or0085. Indicator
lamp 0043flashes yellow. 226
FeaturesStowage and features

If possible, let the drive system cool down and
only touch the components described in the
following. G
WARNING
Windshield washer concentrate is highly flam- mable. If it comes into contact with hot com-
ponents in the front compartment, it may
ignite. There is a risk of fire and injury.
Make sure that no windshield washer con-
centrate is spilled next to the filler neck. X
To open: pull cap0043upwards by the tab.
X Add the premixed washer fluid.
X To close: press cap 0043onto the filler neck
until it engages.
If the washer fluid level drops below the recom- mended minimum of 1 liter, a message appears
in the multifunction display prompting you to
add washer fluid (Y page 188).
Further information on windshield washer fluid/
antifreeze (Y page 285). ASSYST PLUS
Service message
The ASSYST PLUS service interval display
informs you of the next service due date.
You can find information on the type of service
and service intervals in the Maintenance Book-
let.
You can obtain further information from an
authorized Mercedes-Benz Center or at
http://www.mbusa.com (USA only). The multifunction display shows a service mes-
sage for several seconds, e.g.:
R Service A in .. days
Service A in .. days
R Service A due Service A due
R Service A overdue by .. days
Service A overdue by .. days
Depending on the operating conditions of the
vehicle, the remaining time or distance until the
next service due date is displayed.
The letter A Aor B
B, possibly in connection with a
number or another letter, indicates the type of
service. A Astands for a minor service and B
Bfor a
major service.
You can obtain further information from an
authorized Mercedes-Benz Center.
The ASSYST PLUS service interval display does
not take into account any periods of time during
which the battery is disconnected.
Maintaining the time-dependent service sched-
ule:
X Note down the service due date displayed in
the multifunction display before disconnect-
ing the battery.
or X After reconnecting the battery, subtract the
battery disconnection periods from the ser-
vice date shown on the display. Hiding a service message
X Press the 0076or0038 button on the steering
wheel. Displaying service messages
X Switch on the ignition.
X Press the 0059or0065 button to select the
Serv. Serv. menu.
X Press the 0063or0064 button to select the
ASSYST
ASSYST PLUS
PLUSsubmenu and confirm by press-
ing the 0076button.
The service due date appears in the multi-
function display. ASSYST PLUS
233Maintenance and care Z

changed. Anyone who is not directly assisting
in the wheel change should, for example,
stand behind the barrier.
X Get out of the vehicle. Pay attention to traffic
conditions when doing so.
X Close the driver's door. MOExtended tires (tires with run-flat
properties)
General notes With MOExtended tires (tires with run flat char-
acteristics), you can continue to drive your vehi- cle even if there is a total loss of pressure in one
or more tires. The affected tire must not show
any clearly visible damage.
You can recognize MOExtended tires by the
MOExtended marking which appears on the
sidewall of the tire. You will find this marking
next to the tire size designation, the load-bear-
ing capacity and the speed index (Y page 270).
MOExtended tires may only be used in conjunc-
tion with an active tire pressure monitor.
If a pressure loss warning message appears in the multifunction display:
R observe the instructions in the display mes-
sages (Y page 185).
R check the tire for damage.
R if driving on, observe the following notes.
The driving distance possible in run-flat mode is approximately 50 miles (80 km) when the vehi-
cle is partially laden. When the vehicle is fully
laden it is approximately 19 miles (30 km).
In addition to the vehicle load, the driving dis-
tance possible depends upon:
R Vehicle speed
R Road condition
R Outside temperature
The driving distance possible in run-flat mode
may be reduced by extreme driving conditions
or maneuvers, or it can be increased through a
moderate style of driving.
The driving distance possible in run-flat mode is counted from the moment the tire pressure loss
warning appears in the multifunction display.
You must not exceed a maximum speed of
50 mph (80 km/h). When replacing one or all tires, please observe
the following specifications for your vehicle's
tires:
R size
R type and
R the "MOExtended" marking
If a tire has gone flat and cannot be replaced
with a MOExtended tire, a standard tire may be
used as a temporary measure. Make sure that
you use the proper size and type (summer or
winter tire).
Vehicles equipped with MOExtended tires are
not equipped with a TIREFIT kit at the factory. It
is therefore recommended that you additionally
equip your vehicle with a TIREFIT kit if you mount tires that do not feature run-flat properties, e.g.
winter tires. A TIREFIT kit may be obtained from
a qualified specialist workshop.
Important safety notes G
WARNING
When driving in emergency mode, the driving characteristics deteriorate, e.g. when corner-
ing, accelerating quickly and when braking.
There is a risk of an accident.
Do not exceed the stated maximum speed.
Avoid abrupt steering and driving maneuvers,
and driving over obstacles (curbs, potholes,
off-road). This applies in particular to a laden
vehicle.
Stop driving in emergency mode if:
R you hear banging noises.
R the vehicle starts to shake.
R you see smoke and smell rubber.
R ESP ®
is intervening constantly.
R there are tears in the sidewalls of the tire.
After driving in emergency mode, have the
wheel rims checked at a qualified specialist
workshop with regard to their further use. The defective tire must be replaced in every case. 242
Flat tireBreakdown assistance

R
It is particularly important to observe the described order when connecting and disconnecting
the jumper cables.
R Never connect or disconnect the battery terminals while the engine is running. G
WARNING
A discharged battery can freeze at temperatures below freezing point. When jump-starting 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.
! Avoid repeated and lengthy starting attempts.
Do not use a rapid-charging device to start the engine.
If the indicator/warning lamps do not light up in the instrument cluster at low temperatures, it is very likely that the discharged battery has frozen. In this case you may neither jump-start the vehicle norcharge the battery. The service life of a thawed-out battery may be shorter. Have the thawed-out
battery checked at a qualified specialist workshop.
If the 12 V battery is discharged, or after the vehicle has been jump-started, the Service
Service
Required Required Do
DoNot
Not Shift
Shift Gears
GearsVisit
VisitDealer
Dealer message appears. There is a malfunction in the
on-board voltage. Visit a qualified specialist workshop immediately.
The drive system cannot be started if the 12 V battery is discharged. This is not dependent on
whether the high-voltage battery is charged or not. The vehicle cannot be jump-started if the high-
voltage battery is discharged. The high-voltage battery must be charged first.
The drive system can be started using another vehicle. R Only use batteries with an equal nominal voltage (12 volts).
R Make sure that the battery of the donor vehicle does not have a significantly lower capacity than
the discharged battery.
R Use jumper cables with a sufficient cross-section and insulated terminal clamps from a qualified
specialist workshop, e.g. an authorized Mercedes-Benz Center.
R Make sure that the two vehicles do not touch.
R Route the jumper cables so that they cannot be caught by rotating components in the engine
compartment.
R Do not disconnect the discharged battery from the vehicle's electrical system. 250
Jump-startingBreakdown assistance