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Vehicle care215Caution
Only use approved antifreeze.
If the engine cooling system is cold,
the coolant level should be above the
filling line mark. Top up if the level is
low.
9 Warning
Allow the engine to cool before
opening the cap. Carefully open
the cap, relieving the pressure
slowly.
To top up use a 1:1 mixture of
approved coolant concentrate mixed
with tap water. Install the cap tightly.
High voltage battery cooling
system9 Danger
The high voltage battery coolant
may only be serviced by a
qualified technician.
Improper handling could cause serious injuries or death.
The high voltage battery coolantreservoir is located on the front side
of the engine compartment.
Check to see if coolant is visible in the high voltage battery coolant reservoir.
If coolant is visible but the coolant
level is below the cold fill line, there
could be a leak within the cooling
system.
If the coolant level is too low, seek the assistance of a workshop.
Power electronics and charger
modules cooling system9 Danger
The power electronics and
charger modules coolant may only be serviced by a qualified
technician.
Improper handling could cause serious injuries or death.
The power electronics and charger
modules are cooled using the same coolant loop.
The power electronics and charger
modules coolant reservoir is located
on the front side of the engine
compartment.
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216Vehicle care
Check to see if coolant is visible in thepower electronics and charger
modules coolant reservoir. If coolant
is visible but the coolant level is below
the cold fill line, there could be a leak
in the cooling system.
If the coolant level is too low, seek the assistance of a workshop.
Washer fluid
Fill with clean water mixed with a
suitable quantity of approved
windscreen washer fluid which
contains antifreeze.
When adding windscreen washer
fluid to the vehicle, be sure to read the
manufacturer's instructions before
use.
Caution
Only washer fluid with a sufficient
antifreeze concentration provides
protection at low temperatures or
a sudden drop in temperature.
● When using concentrated washer fluid, follow the
manufacturer's instructions for
adding water.
● Do not mix water with ready-to- use washer fluid. Water can
cause the solution to freeze and
damage the washer fluid tank
and other parts of the washer
system.
● Fill the washer fluid tank only three quarters full when it is verycold. This allows for fluid
expansion if freezing occurs,
which could damage the tank if it
is completely full.
● Do not use engine coolant (antifreeze) in the windscreen
washer. It can damage the
windscreen washer system and
paint.
Washer fluid 3 244.
Brakes In the event of minimum thickness ofthe brake lining, a squealing noise
sounds during braking.
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218Vehicle careKeep the vehicle plugged in, even
when fully charged, to keep the high
voltage battery temperature ready for the next drive. This is important when
outside temperatures are extremely
hot or cold.
Refer to the replacement number
shown on the original vehicle battery
label if a new 12-volt vehicle battery
is required. The vehicle has an
Absorbed Glass Mat (AGM) 12-volt
vehicle battery.
Installation of a standard 12-volt vehicle battery will result in reduced
12-volt battery life. When using a 12-
volt battery charger on the 12-volt
AGM battery, note that some
chargers have an AGM battery
setting on the charger. If available, use the AGM setting on the charger,
to limit charge voltage to 14.8 volts.
Follow the charger manufacturer's
instructions.Batteries do not belong in household
waste. They must be disposed of at
an appropriate recycling collection
point.
There are connecting points for jump
starting in the engine compartment.
Jump starting 3 237.
Remove the 12-volt vehicle battery
black negative (−) cable from the
vehicle battery to prevent the 12-volt
battery from running down, or use a
battery trickle charger.
Ensure the vehicle is switched off
before connecting or disconnecting
the vehicle battery.
Vehicle storage 3 211.
Battery discharge protection 3 105.Warning label
Meaning of symbols:
● No sparks, naked flames or smoking.
● Always shield eyes. Explosive gases can cause blindness or
injury.
● Keep the vehicle battery out of reach of children.
● The vehicle battery contains sulphuric acid which could cause
blindness or serious burn
injuries.
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226Vehicle careNumberUsage1–2Power window rear3–4Rechargeable energy
storage system 15–6–7Left high‐beam headlight8Right high‐beam headlight9Left low‐beam headlight10Right low‐beam headlight11Horn12–13Front wiper motor driver14Tailgate15Front wiper motor co-driver16Electronic brake control
module supply electronicsNumberUsage17Rear wiper18Tailgate19Seat module front20Washer21HID light22Linear power module23Electronic brake control
module supply motor24Seat module rear25Powertrain26Transmission range control
module27Aero shutter28Auxiliary oil pump29E-booster motor source30Front power windows31In-panel bussed electrical
centreNumberUsage32Rear window defogger33Heated exterior rear view
mirror34Pedestrian friendly alert
function35–36–37Current sensor38Rain sensor39–40E-booster (ECU)41Power line communication
module42Infant occupant sensing43Window switch44Rechargeable energy
storage system45Vehicle integration control
module
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Vehicle care227NumberUsage46Integrated chassis control
module47Headlight levelling device48Integrated chassis control
module49Interior rear view mirror50–51E-booster52Rear camera53Run/Crank54A/C control module55Rechargeable energy
storage system pump56–57Power electronics coolant
pump58Engine control module59Electric steering column
lockNumberUsage60HVAC electric heater61On-board charging module62Transmission range control
module 163Electric cooling fan64Engine control module65Auxiliary heater pump66Powertrain relay67Drive unit controller68Rear window defogger69Second run/Crank relay70A/C control module71–72Transmission range control
module73Single power inverter
module74–After having changed defective fuses,
close the fuse box cover and press
until it engages.
If the fuse box cover is not closed
correctly, malfunctions may occur.
Instrument panel fuse boxInstrument panel fuse box on the
left side end
The fuse box is located on the driver's
side behind a cover in the instrument
panel.
To open the compartment, compress
the locking tabs, fold cover down and
remove.
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Vehicle care237Temporary spare wheel
The use of tyre chains is not permitted on the temporary spare wheel.Jump starting
Do not start with quick charger.
A vehicle with a discharged vehicle
battery can be started using jump
leads and the vehicle battery of
another vehicle.9 Danger
The high voltage battery cannot be
jump started either with another
vehicle or battery charger.
Personal injury, death, or damage
to the vehicle could result.
9 Warning
Be extremely careful when starting
with jump leads. Any deviation
from the following instructions can
lead to injuries or damage caused
by battery explosion or damage to the electrical systems of both
vehicles.
9 Warning
Avoid contact of the battery with
eyes, skin, fabrics and painted
surfaces. The fluid contains
sulphuric acid which can cause
injuries and damage in the event
of direct contact.
9 Warning
Never jump start another vehicle
by using the terminals located in
the engine compartment.
This could cause a fuse to
overload in the vehicle.
● Never expose the vehicle battery
to naked flames or sparks.
● A discharged vehicle battery can already freeze at a temperature
of 0 °C. Defrost the frozen vehicle
battery before connecting jump
leads.
● Wear eye protection and protective clothing when
handling a vehicle battery.
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238Vehicle care● Use a booster vehicle batterywith the same voltage (12 Volt).
Its capacity (Ah) must not be much less than that of the
discharged vehicle battery.
● Use jump leads with insulated terminals and a cross section of
at least 16 mm 2
.
● Do not disconnect the discharged
vehicle battery from the vehicle.
● Switch off all unnecessary electrical consumers.
● Do not lean over the vehicle battery during jump starting.
● Do not allow the terminals of one
lead to touch those of the other
lead.
● The vehicles must not come into contact with each other during
the jump starting process.
● Apply the parking brake, shift lever in P.
● Open the positive terminal protection cap of both batteries.Battery terminals in the engine
compartment
The battery terminals to jump start the
vehicle are located in the engine
compartment.
The positive battery terminal is
located below a cover. Open the
cover before jump starting the
vehicle.
The negative battery terminal is stud
on a bracket located near the charger
modules.
Jump starting the vehicle
Lead connection order:
1. Connect the red lead to the positive terminal of the booster
vehicle battery.
2. Connect the other end of the red lead to the positive terminal of
your vehicle.
3. Connect the black lead to the negative terminal of the booster
vehicle battery.
4. Connect the other end of the black
lead to the negative battery
terminal (stud).
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Vehicle care239Route the leads so that they cannot
catch on rotating parts in the engine
compartment.
To start the vehicle: 1. Start the engine of the vehicle providing the jump.
2. After five minutes, press POWER m to switch on the
vehicle.
After the instrument cluster
initialises, the vehicle will use
power from the high voltage
battery to charge the 12-volt
battery.
3. Switch on electrical consumers (e.g. headlights, heated rear
window) of the vehicle receiving
the jump start.
4. Reverse above sequence exactly when removing leads.Towing
Towing the vehicleCaution
Incorrect towing of a disabled
vehicle may cause damage to the
vehicle. The disabled vehicle
should only be towed on a flatbed
car carrier.
Ensure the vehicle is only towed
by well trained technicians.
Insert a screwdriver in the slot at the
short edge of the cap. Release the
cap by carefully moving the
screwdriver sidewards. To prevent
damage, it is recommended to place
a cloth between the screwdriver and
the frame.
The towing eye is stowed with the vehicle tools 3 230.
Screw in the towing eye as far as it will
go until it stops in a horizontal
position.
Attach a tow rope – or better still a tow
rod – to the towing eye.
The towing eye must only be used for towing and not for recovering the
vehicle.