the vehicle's high-voltage electrical system
checked by a qualified specialist workshop.
All of the vehicle's high-voltage electrical sys-
tem components are marked with yellow
warning stickers which warn you about high
voltages. The cables of the vehicle's high-
voltage electrical system are orange.
When towing a vehicle after an accident, be
sure to observe the following sections:
RTransporting the vehicle (Ypage 297)
RTowing the vehicle with the front axle raised
(
Ypage 297)
RTowing a vehicle with both axles on the
ground (
Ypage 296)
Read the important safety instructions on
towing away (
Ypage 294).
The ignition must be switched off when car-
rying out general tasks, such as changing
bulbs or checking the coolant level.
Automatic switching off of the vehicle's high-voltage electrical system
If the restraint systems are activated during
an accident, the vehicle's high-voltage elec-
trical system is automatically deactivated.
This is to ensure that you do not come into
contact with high voltage.
Automatic protection from switching
on of the vehicle's high-voltage electri-
cal system
The vehicle's high-voltage electrical system is
not activated when the vehicle is started if:
Ra serious electrical insulation malfunction
is detected in the vehicle's high-voltage
electrical system.
Ran electrical connection in the vehicle's
high-voltage electrical system is discon-
nected.
Automatic switching off of the charging
process
The charging process is deactivated automat-
ically if:
Rthe high-voltage battery is fully charged
The charging process is interrupted automat-
ically if:
Ra serious electrical insulation malfunction
is detected in the vehicle's high-voltage
electrical system.
Ran electrical connection in the vehicle's
high-voltage electrical system is discon-
nected.
High-voltage switch-off device
!The high-voltage system must only be
switched off at vehicle standstill by spe-
cially trained service engineers. Otherwise
the high-voltage system may be damaged.
Your vehicle is equipped with a high-voltage
switch-off device :which can be used to
24Introduction
The high-voltage battery can be charged as
follows:
Rthrough energy recuperation while the
vehicle is in motion
Rwith the charging cable at a mains socket
while the vehicle is stationary
Rwith the charging cable at a charging sta-
tion while the vehicle is stationary
The high-voltage battery can be charged
using a single-phase charging cable in a volt-
age range from 100 V to 240 V.
If the condition of charge drops to less than
13%, the high-voltage battery reserve indica-
tor lamp lights up in the instrument cluster.
Charge the high-voltage battery as soon as
possible.
Below a condition of charge of 5%, the per-
formance of the vehicle is reduced. The vehi-
cle's high-voltage electrical system switches
off at a condition of charge of 0%.
Use of the pre-entry climate control function
may mean that the high-voltage battery is not
fully charged.
High and low outside temperatures
Low outside temperatures
The efficiency of the high-voltage battery is
significantly reduced at very low outside tem-
peratures. The high-voltage battery is then no longer able to provide the normal electrical
power output.
High outside temperatures
To prevent damage to the high-voltage bat-
tery due to very high outside temperatures,
the maximum power output of the high-volt-
age battery is reduced automatically.
The E-CELL display indicates the maximum
amount of power available (
Ypage 183).
Notes on battery care
Avoid storing or transporting the vehicle in
high temperatures over a long period (e.g.
container transport). If you park the vehicle and leave it stationary
for longer periods, connect it to a power sup-
ply.
Temperatures below
Ò13‡(Ò25 †) and over
104 ‡ (40 †), which affect the vehicle for a
period of more than seven days, can cause
irreversible damage.
Discharged battery
The vehicle's high-voltage electrical system
switches off if the high-voltage battery is com-
pletely discharged. 30 seconds prior to this,
you are informed of the switch-off by the
Battery level too low. Stop and
charge immediatelymessage. This pro-
tects the battery from exhaustive discharge.
It is not possible to restart the drive system
until after charging.
Do not leave the vehicle parked for longer
than 14 days with a high-voltage battery con- dition of charge below 20%.
You can check the condition of charge in the
charge level display (
Ypage 184).
Further information on the "Energy flow dis-
play" can be found in the "Trip" menu
(
Ypage 187).
Energy consumption and range
This range is reduced by:
Rhigh and low outside temperatures
Ra non-anticipatory driving style
Rswitching on consumers, e.g. air-condition-
ing system or heating.
The battery's physical characteristics are
such that leaving the vehicle parked for an
extended period at low outdoor temperatures
without charging it can lead to:
Ra reduction in battery performance
Rlonger charge times
In extreme cases, this could mean that the
vehicle cannot be started. For this reason,
connect the charging cable when leaving the
vehicle parked for long periods at low outdoor
temperatures.
High-voltage battery143
Driving and parking
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