2012 MERCEDES-BENZ SLS AMG ROADSTER battery location

SmartKeyDisplay messagesPossible causes/consequences and M Solutions+
Replace Key BatteryThe SmartKey batteries are discharged.XChange the batteries ( Y page 66).+
Key Not Detected
(red display message)The SmartKey is not in the vehicle. A warning tone also sounds.
When you switch off the engine, you will be unable to restart it.XPull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.XLocate the SmartKey.The SmartKey is not detected while driving because a powerful
radio transmitter is causing interference. A warning tone also
sounds.XPull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.XInsert the SmartKey into the ignition lock and turn it to the
desired position ( Y page 115).+
Key Not Detected
(white display
message)You are in the vehicle and the SmartKey currently cannot be
detected by the vehicle.XChange the location of the SmartKey in the vehicle.
If the SmartKey still cannot be detected:
XInsert the SmartKey into the ignition lock and turn it to the
desired position ( Y page 115).+
Obtain a New Key The SmartKey needs to be replaced.XVisit a qualified specialist workshop.+
Key Does Not
Belong to VehicleYou have put the wrong SmartKey in the ignition lock.XUse the correct SmartKey.+
Close Doors to
Lock VehicleAt least one door is open. A warning tone also sounds.XClose all doors and lock the vehicle again.Displays and operation185On-board computer and displaysZ

Coupe (example)
XTo open: lightly press the center of
cover :.
The stowage compartment opens.XLift up the cover of socket ;.XTo close: fold down cover :.
mbrace 12
Important safety notes
! A license agreement must exist in order
to activate the mbrace service. Ensure that
your system is activated and ready for use,
and press the ï MB Info call button to
register. If any of the steps mentioned is
not carried out, the system may not be
activated.
If you have questions about the activation,
contact one of the following telephone
assistance services:
R USA: Mercedes-Benz Customer
Assistance Center under
1-800-FOR-MERCedes
(1-800-367-6372) or 1-888-990-9007
R Canada: Customer Service at
1-888-923-8367
Shortly after successfully registering with the
mbrace service, a user ID and password will
be sent to you by mail. You can use this
password to log in to the mbrace section
under "Owners Online" at http://
www.mbusa.com 13
.
The mbrace system is available if:
R it has been activated and is operational.
R the corresponding mobile phone network
is available for transmitting data to the
Customer Center.
R a service subscription is available.
R the starter battery is sufficiently charged.
i Determining the location of the vehicle on
a map is only possible if there is sufficient
GPS reception and the vehicle position can
be forwarded to the Customer Center.
The mbrace system
The mbrace system provides various
services, e.g.:
R automatic and manual emergency call
R Roadside Assistance call
R MB Info call
To adjust the volume during an mbrace call,
proceed as follows:
XPress the W or X button on the
multifunction steering wheel.
or
XUse the volume controller of COMAND.
You can find further information and a
description of all available features under
"Owners Online" at http://
www.mbusa.com 14
.
Self-diagnosis of the system
After you have switched on the ignition, the
system carries out a self-diagnosis.
12 The system is called TELE AID in Canada.
13 USA only.
14 USA only.Features205Stowage and featuresZ

Mercedes-Benz recommends that you do not
carry out work on batteries yourself, e.g.
removing or charging. Always have this work
performed at a qualified specialist workshop,
e.g. an authorized Mercedes-Benz Center.
i If the battery power supply has been
interrupted, e.g. if the battery has been
reconnected, you must reset the function
for automatically folding the exterior
mirrors in/out by folding the mirrors out
once ( Y page 90).
Installation location of the battery
Your vehicle is equipped with a battery in the
engine compartment. It is installed on the
front bulkhead on the right-hand side of the
vehicle when viewed in the direction of travel.
XShift the transmission to P with the button
in the center console.XDeactivate all electrical consumers, e.g.
radio, automatic climate control, etc.XMake sure that the ignition is switched off.
All indicator lamps in the instrument cluster
must be off.XOpen the hood ( Y page 218).:Negative terminal;Positive terminal=Breather hose
i Further related subjects:
R charging the battery ( Y page 242)
R jump-starting ( Y page 243)
Charging the batteryGWARNING
Never charge a battery still installed in the
vehicle unless a battery charger unit approved
by Mercedes-Benz is being used. Gases may
escape during charging and cause explosions
that may result in paint damage, corrosion or
personal injury.
A battery charger unit specially adapted for
Mercedes-Benz vehicles and tested and
approved by Mercedes-Benz is available as an
accessory. It permits the charging of the
battery in its installed position. Contact an
authorized Mercedes-Benz Center for further
information and availability.
Charge the battery in accordance with the
separate instructions for the battery charger.
GWARNING
There is a risk of acid burns during the
charging process due to the gases which
escape from the battery. Do not lean over the
battery during the charging process.
GWARNING
Battery acid is caustic. Avoid contact with the
skin, eyes or clothing.
! Only charge the installed battery with a
battery charger which has been tested and
approved by Mercedes-Benz. These battery
chargers allow the battery to be charged
while still installed.
! Only use battery chargers with a
maximum charging voltage of 14.8 V.
XOpen the hood ( Y page 218).XRead the battery charger's operating
instructions before charging the battery.XConnect the battery charger to the positive
terminal and earth point in the same order
as when connecting the donor battery in
the jump-starting procedure
( Y page 243).242BatteryBreakdown assistance