Page 231 of 325
Vehicle care229Engine coolant
The coolant provides freeze
protection down to approx. -28 °C. In
northern countries with very low
temperatures, the factory filled
coolant provides frost protection
down to approx. -37 °C.Caution
Only use approved antifreeze.
Coolant level
Caution
Too low a coolant level can cause engine damage.
If the cooling system is cold, the
coolant level should be above the
filling line mark. Top up if the level is
low.
On another version, the filling line
mark is inside the filler opening. To
check, open the cap.
Additional cooling circuit for Turbo
engine
Coolant container is fixed at the air
cleaner housing.
If the cooling system is cold, the
coolant level should be above the
filling line mark. Top up if the level is
low.
Page 232 of 325

230Vehicle careGeneral9Warning
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
released coolant concentrate mixed
with clean tap water. If no coolant
concentrate is available, use clean
tap water. Install the cap tightly. Have the coolant concentration checked
and have the cause of the coolant
loss remedied by a workshop.
Power steering fluid
Caution
Extremely small amounts of
contamination can cause steering
system damage and cause it to not
work properly. Do not allow
contaminates to contact the fluid
side of the reservoir cap/dipstick or
from entering the reservoir.
Power steering fluid level normally
does not have to be checked. If an
unusual noise sounds during steering or the power steering reacts
conspicuous 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.
Caution
Only washer fluid with a sufficient
antifreeze concentration provides
protection at low temperatures or
a sudden drop in temperature.
Use of washer fluid containing
isopropanol can damage exterior
lamps.
Page 277 of 325

Service and maintenance275Additional engine oil additives
The use of additional engine oil
additives could cause damage and
invalidate the warranty.
Engine oil viscosity grades
The SAE viscosity grade gives
information of the thickness of the oil.
Multigrade oil is indicated by two
figures, e.g. SAE 5W-30. The first
figure, followed by a W, indicates the
low temperature viscosity and the
second figure the high temperature viscosity.
Select the appropriate viscosity grade depending on the minimum ambient
temperature 3 278.
All of the recommended viscosity
grades are suitable for high ambient
temperatures.
Coolant and antifreeze
Use only organic acid type-long life
coolant (LLC) antifreeze approved for
the vehicle. Consult a workshop.
The system is factory filled with
coolant designed for excellent
corrosion protection and frost
protection down to approx. -28 °C. Innorthern countries with very low
temperatures the factory filled coolant provides frost protection down to
approx. -37 °C. This concentration
should be maintained all year round.
The use of additional coolant
additives that intend to give additional
corrosion protection or seal against
minor leaks can cause function
problems. Liability for consequences
resulting from the use of additional
coolant additives will be rejected.
Brake and clutch fluid
Over time, brake fluid absorbs
moisture which will reduce braking
effectiveness. The brake fluid should
therefore be replaced at the specified interval.
AdBlue Only use AdBlue to reduce the
nitrogen oxides in the exhaust
emission 3 164.
Page 321 of 325

319Charging system ........................ 104
Child locks ................................... 28
Child restraint installation locations ................................... 65
Child restraints.............................. 63
Child restraint systems ................63
Climate control ............................. 15
Climate control systems .............140
Clock............................................. 89
Collision damage repair ..............314
Colour-Info-Display .....................117
Control indicators........................ 103
Control of the vehicle .................155
Controls ........................................ 85
Convex shape .............................. 37
Coolant and antifreeze ...............274
Cruise control ....................109, 180
Cupholders .................................. 69
Curtain airbag system .................. 61
Curve lighting.............................. 132
D Danger, Warnings and Cautions ...4
Daytime running lights ...............131
Declaration of conformity ............311
DEF ............................................ 164
Diesel exhaust fluid ....................164
Diesel fuel system bleeding .......233
Diesel particle filter .............107, 163
Door open .................................. 110Doors............................................ 29
Driver assistance systems ..........180
Driver Information Centre ...........110
Driving characteristics and towing tips .............................. 221
Driving hints ................................ 155
Dual automatic climate control system ..................................... 147
E Electric adjustment ......................37
Electrical system......................... 244
Electric parking brake .........105, 173
Electric parking brake fault .........105
Electronic driving programmes ..170
Electronic key system ...................22
Electronic Stability Control.......... 176
Electronic Stability Control and Traction Control system ..........107
Electronic Stability Control off..... 107
End-of-life vehicle recovery .......225
Engine compartment fuse box ...246
Engine coolant ........................... 229
Engine coolant temperature ......107
Engine coolant temperature gauge ..................................... 101
Engine data ............................... 281
Engine exhaust .......................... 163
Engine identification ...................277
Engine oil ................... 227, 274, 278Engine oil pressure ....................108
Entry lighting .............................. 138
Event data recorders ..................316
Exit lighting ................................ 138
Exterior care .............................. 270
Exterior light ............................... 109
Exterior lighting ....................12, 128
Exterior mirrors ............................. 37
F
Fault ........................................... 170
First aid ......................................... 80
First aid kit ................................... 80
Fixed air vents ........................... 152
Fog light ..................................... 109
Fog lights ................................... 239
Folding mirrors ............................. 37
Following distance ......................106
Following distance indication ......194
Forward collision alert................. 190
Front airbag system .....................60
Front fog lights ........................... 135
Front seats.................................... 47
Front storage ................................ 70
Front turn signal light ..................235
Fuel............................................. 213
Fuel consumption - CO 2-
Emissions ............................... 220
Fuel for diesel engines ..............213
Fuel for liquid gas operation .......213