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The battery compartment is accessible.3.Slide the key in the cover of the battery
compartment and raise the cover.
4.Insert a battery of the same type with the
positive side facing up.
5.Insert lid and cover.6.Push key into the remote control until it en‐
gages.
Have old batteries disposed of by a
dealer’s service center or another quali‐
fied service center or repair shop or
take them to a collection point.
New remote controls
New remote controls are available from a
dealer’s service center or another qualified
service center or repair shop.
Loss of the remote controls
The lost remote control can be blocked by a
dealer’s service center or another qualified
service center or repair shop.
Emergency detection of remote control
It is possible to switch on the ignition or start
the engine in situations such as the following:
▷Interference of radio transmission to re‐
mote control by external sources e.g., by
radio masts.
▷Empty battery in remote control.▷Interference from radio transmissions
through mobile devices in close proximity
to remote control.
▷Interference of radio transmission by a
charging process of a mobile device, for ex‐
ample charging of a mobile phone.
A Check Control message is displayed if an at‐
tempt is made to switch on the ignition or start
the engine.
Starting the engine via emergency
detection of the remote control
Steptronic transmission: if a corresponding
Check Control message appears, hold the re‐
mote control, as shown, against the marked
area on the steering column and press the
Start/Stop button within 10 seconds while
pressing the brake.
Manual transmission: if a corresponding Check
Control message appears, hold the remote con‐
trol, as shown, against the marked area on the
steering column and press the Start/Stop but‐
ton within 10 seconds while pressing the
clutch.
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Page 151 of 246

CAUTION
If metal objects fall into the socket, they
can cause a short circuit. There is risk of prop‐
erty damage. Replace the cigarette lighter or
socket cover again after using the socket.◀
Sockets
Sockets can be used for the running electrical
devices with the engine running or with the ig‐
nition switched on. The total load of all sockets
must not exceed 140 watts at 12 volts.
Do not damage the socket by using non-com‐
patible connectors.
In the front center console
Remove the cover or cigarette lighter.
In the rear center console
Remove the cover.
In the trunk
The socket is located on the right side in the
trunk.
USB interface
The concept
Connection for USB devices with music files and
for importing data, such as for Personal Profile
settings.
Information
Observe the following when connecting:
▷Do not use force when plugging the con‐
nector into the USB interface.
▷Do not connect devices such as fans or
lights to the USB interface.
▷Do not connect any USB hard drives or USB
hubs.
▷Do not use the USB interface for recharging
external devices.
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Battery replacement
CAUTION
Vehicle batteries that are not compatible
can damage vehicle systems and impair vehicle
functions. There is a risk of personal and prop‐
erty damage. Only vehicle batteries that are
compatible with your vehicle type should be in‐
stalled in your vehicle. Information on compati‐
ble vehicle batteries is available at your dealer’s
service center.◀
After a battery replacement, the manufacturer
of your vehicle recommends that the vehicle
battery be registered on the vehicle by a
dealer’s service center or another qualified
service center or repair shop to ensure that all
comfort features are fully available and that
any Check Control messages of these comfort
features are no longer displayed.
Charging the battery
General information
Make sure that the battery is always sufficiently
charged to guarantee that the battery remains
usable for its full service life.
The battery may need to be charged in the fol‐
lowing cases:
▷When making frequent short-distance
drives.
▷If the vehicle is not used for more than a
month.
▷Steptronic transmission: when parked for
long periods of time in selector lever posi‐
tion D, R or N.
Information
CAUTION
Battery chargers for the vehicle battery
can work with high voltages and currents,
which means that the 12 volt on-board net‐
work can be overloaded or damaged. There is
risk of property damage. Only connect battery
chargers for the vehicle battery to the starting
aid terminals in the engine compartment.◀
Starting aid terminals
In the vehicle, only charge the battery via the
starting aid terminals, refer to page 217, in the
engine compartment with the engine off.
Power failure
After a power loss, some equipment needs to
be newly initialized or individual settings up‐
dated, for example:
▷Time: update.▷Date: update.▷Navigation system: wait for the operability
of the navigation.
▷Seat and mirror memory: store the posi‐
tions again.
▷Glass sunroof: initialize the system, refer to
page 49.
Disposing of old batteries
Have old batteries disposed of by a
dealer’s service center or another quali‐
fied service center or repair shop or
take them to a collection point.
Maintain the battery in an upright position for
transport and storage. Secure the battery so
that it does not tip over during transport.
Fuses
Information
WARNING
Incorrect and repaired fuses can overload
electrical lines and components. There is risk of
fire. Never attempt to repair a blown fuse. Do
not replace a nonworking fuse with a substitute
of another color or amperage rating.◀
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