
Display
;
; Lights up
green There are no faults. The
high-voltage battery can be
charged.
Lights up red An impermissible current is
being supplied to the con-
trol unit. The high-voltage
battery cannot be charged.
i
Information on problems relating to the
charging process (Y page 218).
Setting the maximum charge current G
WARNING
If the charge current draw via a mains socket is too high during the charging process, the
external mains supply may overheat. There is a risk of fire.
Before charging, check the maximum permis-
sible charge current available at the location.
If necessary, contact a qualified specialist
company for assistance.
Adjust your vehicle's settings, if necessary.
! If the charge current is too high, the fuse
could be tripped or the external mains sup-
ply could overheat. Check if the external
mains supply is equipped to handle the pro- grammed charge current. If necessary,
reduce the programmed charge current or
use a different mains socket.
You can set a limit for the values of the charge
current used in charging the high-voltage bat- tery. This acts as a means of preventing the
mains supply from overloading. You can set
this limit by using the controls on the charging
cable or in the on-board computer's menu.
Only set the maximum charge current in the
on-board computer menu if there are no
charge current settings on the charging
cable.
The default value in the vehicle corresponds
to the maximum charge value.
The default value on the charging cable is the
minimum setting. This corresponds to the minimum available charge current from the
mains supply. The value on the charging cable
can be increased and is described below.
i The value of the maximum setting and the
adjustment value may vary depending on
the country.
Before charging the high-voltage battery,
check the maximum permissible charge cur-
rent for the relevant power socket.
X To adjust the setting: press button?
repeatedly until the desired setting is selec- ted in display =.
R Two LEDs are flashing: minimum setting
R All LEDs are flashing: maximum setting
If, after the charging process, the charging
cable is:
R left connected to the power socket, the
currently selected values will be used for
the next charging process.
R removed from the power socket, the values
will be reset to the minimum setting for the next charging process. You may then need
to reset the values of the maximum charge current.
i If the vehicle requires more time than
usual when charging, check the maximum
charge current settings using the controls
on the charging cable or in the on-board
computer's menu.
Indicator lamps on the vehicle socket
When the indicator lamps on the vehicle
socket light up, this means the following: Left indica-
tor lamp
Ì Ì
Lights up
white The charging cable can be
removed or connected.
Flashes
white The charging cable connec-
tor has been connected
incorrectly. 214
Cha
rging the high-voltage battery (PLUG-IN HYBRI D vehicles)Driving and parking

Right indi-
cator lamp
Ý Ý
Flashes
orange The connection between
the vehicle and the current
source is being established
before charging begins.
Flashes
green The high-voltage battery is
charging.
Flashes red A malfunction has occurred
while charging.
The indicator lamp goes out
after approximately
90 seconds. Lights up
orange Charging of the high-voltage
battery has been tempora-
rily interrupted.
The indicator lamp goes out
after approximately
90 seconds. Lights up
green The high-voltage battery is
fully charged.
The indicator lamp goes out
after approximately
90 seconds. i
If the indicator lamps are off, lock or
unlock the vehicle. The indicator lamps will then display the current status of the charg-ing process again. Connecting the charging cable
X
Shift the transmission to position P.
X Switch the ignition off.
X Press the charge socket flap in the direc-
tion of arrow :.
The charge socket flap swings up.
X Open socket cap ;.
X Insert the mains plug into the mains socket
to the stop.
X Insert the charging cable connector into
vehicle socket Ato the stop.
The high-voltage battery is charging.
The Ý right indicator lamp ?first
flashes orange and then green.
i If the charging cable is plugged in, you
cannot start the engine or move the vehi-
cle.
i Depending on the temperature, the cool-
ing fan and battery cooling system may
audibly switch on during the charging proc- ess. Charging the high-voltage battery (PLUG-IN HYBRID vehicles)
215Driving and parking Z

Removing the charging cable
The high-voltage battery is fully charged
when:
R the charge level display reaches 100% in
the multifunction display
R the indicator lamp in the vehicle socket
lights up green after unlocking or locking
the vehicle
You can find information on the charge status indicator in the multifunction display in
"PLUG-IN HYBRID operation", section
"Menus and submenus" under "Energy flow
display" (Y page 291).
i After the charging cable has been discon-
nected, the indicator lamps in the vehicle
socket remain lit for some time before
switching off.
X Unlock the vehicle.
X Remove the charging cable from vehicle
socket Awithin 30 seconds. Otherwise,
the vehicle will relock.
X Close socket cap ;.
X Close charge socket flap :.
X Remove the charging cable from the mains
socket.
X Stow the charging cable safely in the vehi-
cle (Y page 213). Charging the high-voltage battery
from the wallbox
General notes It is recommended that you charge your vehi-
cle using a wallbox or at a charging station.
Use the optionally available fast-charging
cable when charging your vehicle from a wall- box. The charging cable is stored in a bag in
the luggage compartment.
Only use charging cables that have been tes-ted and approved by the manufacturer for
charging the high-voltage battery in an elec-
tric vehicle. Observe the "Important safety notes"
(Y
page 210).
Connecting the charging cable X
Shift the transmission to position P.
X Switch the ignition off.
X Press the charge socket flap in the direc-
tion of arrow :.
The charge socket flap swings up.
X Open socket cap ;.
X Insert the charging cable connector into
vehicle socket Ato the stop.
X Wallbox without a preinstalled cable: insert
the charging cable connector into the
power socket of the wallbox to the stop.
The high-voltage battery is charging.
The Ý right indicator lamp ?first
flashes orange and then green.
i If the charging cable is plugged in, you
cannot start the engine or move the vehi-
cle.
i Depending on the temperature, the cool-
ing fan and battery cooling system may 216
Charging the high-voltage battery (PLUG-IN HYBRID vehicles)Driving and parking

audibly switch on during the charging proc-
ess.
Removing the charging cable The high-voltage battery is fully charged
when:
R the charge level display reaches 100% in
the multifunction display
R the indicator lamp in the vehicle socket
lights up green after unlocking or locking
the vehicle
You can find information on the charge status indicator in the multifunction display in
"PLUG-IN HYBRID operation", section
"Menus and submenus" under "Energy flow
display" (Y page 291).
i After the charging cable has been discon-
nected, the indicator lamps in the vehicle
socket remain lit for some time before
switching off.
X Unlock the vehicle.
X Remove the charging cable from vehicle
socket Awithin 30 seconds. Otherwise,
the vehicle will relock.
X Close socket cap ;.
X Close charge socket flap :.
X Wallbox without a preinstalled cable: where
necessary, remove the charging cable from the wallbox and stow it safely in the vehicle. Charging the high-voltage battery at
the charging station
Before beginning the charging process at a
charging station without communication
capabilities, you must first activate the sta-
tion, e.g. using an RFID card. Observe the on- site operator instructions for the charging
station.
Connecting the vehicle to a charging station
is identical to connecting it to a wallbox
(Y page 216). Charging the high-voltage battery (PLUG-IN HYBRID vehicles)
217Driving and parking Z

Problems with the charging process
Problem
Possible causes/consequences and
M
MSolutions The charge socket flap
cannot be opened. The charge socket flap is not unlocked.
X Unlock the vehicle (Y page 95).
If the key battery is discharged:
X Unlock the driver's door using the emergency key element
(Y page 97).
or
X Unlock the vehicle centrally from the inside (Y page 101).The charge socket flap is unlocked, but the opening mechanism is
jammed.
X Lock the vehicle and unlock it again.
If, after that, the opening mechanism is still jammed:
X Consult a qualified specialist workshop. The charging cable can-
not be inserted into the
vehicle socket. The vehicle socket is locked.
X Unlock the vehicle (Y page 95).
X Shift the transmission to position P.The high-voltage bat-
tery is not being
charged. The
Ý indicator lamp on the vehicle socket does not light up or
flashes red.
A malfunction has occurred during the initialisation of the charging
process or during charging.
X Remove the charging cable connector from the vehicle socket
and re-insert it into the vehicle socket.
If the problem persists:
X Use a different charging station.
or
X Consult a qualified specialist workshop. The high-voltage bat-
tery is not charged dur-
ing the charging proc-
ess when connected to
a mains socket. The
Ý indicator lamp on
the vehicle socket does not light up after the
charging cable connec-
tor has been inserted
into the vehicle socket. The mains socket is faulty.
X Have the mains socket checked to test if it is functioning prop-
erly.
or
X Use a different mains socket. 218
Charging the high-voltage battery (PLUG-IN HYBRID vehicles)Driving and parking

Releasing automatically
The electric parking brake of your vehicle is
released automatically when all of the follow-
ing conditions are fulfilled:
R the engine is running
R the transmission is in position Dor R
R the seat belt is fastened
R you depress the accelerator pedal
If the transmission is in position R, the boot lid
must be closed.
If your seat belt is not fastened, the following conditions must be fulfilled to automatically
release the electric parking brake:
R the driver's door is closed
R you have shifted out of transmission posi-
tion Por you have previously driven faster
than 3 km/h
Ensure that you do not depress the acceler-
ator pedal unintentionally. Otherwise, the
parking brake will be released and the vehicle will start to move.
Emergency braking The vehicle can also be braked during an
emergency by using the electric parking
brake.
X While driving, push handle :of the electric
parking brake (Y page 220).
The vehicle is braked as long as you keep
handle :of the electric parking brake
depressed. The longer electric parking
brake handle :is depressed, the greater
the braking force.
During braking:
R a warning tone sounds
R the Release
Release parking parkingbrake
brakedisplay mes-
sage appears
R the red !indicator lamp in the instru-
ment cluster flashes
When the vehicle has been braked to a stand- still, the electric parking brake is applied. Parking up the vehicle
If you leave the vehicle parked up for longer
than four weeks, the battery may be damaged
by exhaustive discharging.
If you leave the vehicle parked up for longer
than six weeks, it may suffer from lack of use.
X Contact a qualified specialist workshop
and seek advice.
i You can obtain information about trickle
chargers from a qualified specialist work-
shop.
PLUG-IN HYBRID vehicles: observe the
important safety notes for the high-voltage
battery (Y page 440). Driving tips
General driving tips
Important safety notes G
WARNING
If you switch off the ignition while driving,
safety-relevant functions are only available
with limitations, or not at all. This could affect, for example, the power steering and the brake
boosting effect. You will require considerably
more effort to steer and brake. There is a risk of an accident.
Do not switch off the ignition while driving.
Drive sensibly – save fuel Observe the following tips to save fuel:
X The tyres should always be inflated to the
recommended tyre pressure.
X Remove unnecessary loads.
X Remove roof racks when they are not nee-
ded.
X Warm up the engine at low engine speeds.
X Avoid frequent acceleration or braking.
X Have all maintenance work carried out as
indicated by the service intervals in the 222
Driving tipsDriving and parking

R
the electrical system in the engine com-
partment, the battery or the fuses have
been tampered with.
R the battery is disconnected.
R the accelerator pedal has been depressed,
e.g. by a vehicle occupant.
There is a risk of an accident.
If you wish to exit the vehicle, always turn off
DISTRONIC PLUS and secure the vehicle
against rolling away.
Further information on deactivating
DISTRONIC PLUS (Y page 243).
If DISTRONIC PLUS detects that the vehicle in
front is stopping, it brakes your vehicle until it is stationary.
Once your vehicle is stationary, it remains
stationary and you do not need to depress the
brake.
i After a short period, the vehicle is secured
by the electric parking brake, thus relieving
the service brake.
i Depending on the specified minimum dis-
tance, your vehicle will come to a standstill
at a sufficient distance behind the vehicle in
front. The specified minimum distance is
set using the control on the cruise control
lever.
When DISTRONIC PLUS is activated, the
transmission is shifted automatically to posi- tion Pif:
R the driver's seat belt is not fastened and the
driver's door is open
R the engine is switched off, unless it is auto-
matically switched off by the ECO start/
stop function
The electric parking brake secures the vehicle
automatically if DISTRONIC PLUS is activated
when the vehicle is stationary and:
R a system fault occurs
R the power supply is insufficient
If a fault occurs, the transmission may also
shift into position Pautomatically. Setting a speed
X
Press the cruise control lever up :for a
higher speed or down ;for a lower speed.
X Keep the cruise control lever pressed until
the desired speed is reached.
X Release the cruise control lever.
The new speed is stored. DISTRONIC PLUS
is activated and adjusts the vehicle's speed to the new speed stored.
X To adjust the set speed in 1 km/h incre-
ments: briefly press the cruise control
lever up :or down ;to the pressure
point.
The last stored speed increases or decrea- ses in 1 km/h increments.
X To adjust the set speed in 10 km/h
increments: briefly press the cruise con-
trol lever up :or down ;beyond the
pressure point.
The last stored speed increases or decrea-
ses in 10 km/h increments.
i If you accelerate to overtake, DISTRONIC
PLUS adjusts the vehicle's speed to the last
speed stored after you have finished over-
taking.
Setting the specified minimum distance You can set the specified minimum distance
for DISTRONIC PLUS by varying the time span between one and two seconds. With this func-
tion, you can set the minimum distance that
DISTRONIC PLUS maintains to the vehicle in
front, dependent on vehicle speed. You can Driving systems
241Driving and parking Z

Information in the multifunction display
If Steering Assist and Stop&Go Pilot are acti-
vated but not ready for a steering interven-
tion, steering wheel symbol :appears in
grey. If the system provides you with support
by means of steering interventions, sym-
bol :is shown in green.
Deactivating Steering Assist and Stop&Go Pilot
X Press button ;.
Indicator lamp :goes out. The DTR+:
DTR+:
steering
steering assist.
assist.off
off message appears
in the multifunction display. Steering Assist and Stop&Go Pilot are deactivated.
When DISTRONIC PLUS is deactivated or not available, Steering Assist and Stop&Go Pilot
are deactivated automatically. HOLD function
General notes The HOLD function can assist the driver in the
following situations:
R when pulling away, especially on steep
slopes
R when manoeuvring on steep slopes
R when waiting in traffic
The vehicle is kept stationary without the
driver having to depress the brake pedal.
The braking effect is cancelled and the HOLD function is deactivated when you depress theaccelerator pedal to pull away. Important safety notes G
WARNING
When leaving the vehicle, it can still roll away despite being braked by the HOLD function if:
R there is a malfunction in the system or in
the voltage supply
R the HOLD function is deactivated by the
accelerator pedal being depressed, e.g. by
a vehicle occupant
R the electrical system in the engine com-
partment, the battery or the fuses are tam-
pered with
R the battery is disconnected
There is a risk of an accident.
Before leaving the vehicle, always deactivate
the HOLD function and secure the vehicle
from rolling away.
! When DISTRONIC PLUS or the HOLD
function is activated, the vehicle brakes
automatically in certain situations.
To avoid damage to the vehicle, deactivate DISTRONIC PLUS and the HOLD function in
the following or similar situations:
R when towing away
R in a car wash
Deactivating the HOLD function
(Y page 248).
Activation conditions You can activate the HOLD function if all of
the following conditions are fulfilled:
R the vehicle is stationary
R the engine is running or if it has been auto-
matically switched off by the ECO start/
stop function
R the driver's door is closed or your seat belt
is fastened
R the electric parking brake is released
R the transmission is in position D,Ror N
R DISTRONIC PLUS is deactivated Driving systems
247Driving and parking Z