
202Checking and refilling levels
Opening the coolant expansion tank
–Switch off the engine and allow it to cool.
– To prevent scalding, cover the cap on the expansion tank with a
thick cloth and carefully unscrew the cap ⇒
.
Checking coolant level
– Look into the open coolant expansion tank and read off the
coolant level.
– If the level is below the “MIN” mark, top up with coolant.
Topping up coolant
– Only use new coolant liquid.
– Do not fill above the “MAX” mark.
Closing the coolant expansion tank
– Screw the cap on again tightly.
The position of the coolant expansion reservoir is shown in the correspond-
ing engine compartment illustration ⇒ page 250.
Ensure the coolant conforms to the required specifications. Do not use a dif-
ferent type of additive if additive G 12++ is not available. In this case use
only water and bring the coolant concentration back up to the correct level
as soon as possible by putting in the specified additive.
Always top up with new coolant.
Do not fill above the “MAX” mark. Otherwise the excess coolant will be
forced out of the cooling system when the engine is hot.
The additive G 12++ can be mixed with the G 12+ in any proportion.
WARNING
Any work carried out in the engine compartment or on the engine must
be carried out cautiously.
● When working in the engine compartment, always observe the safety
warnings ⇒ page 194.
● When the engine is warm or hot, the cooling system is pressurised!
Do not unscrew the cap on the expansion tank when the engine is hot.
This is a burn injury risk.
CAUTION
● If you notice a change in the colour of the liquid because it has been in
use for a long time, it is recommended to change it, as it will have lost some
of its properties and could cause damage to the vehicle.
● If a lot of coolant fluid has been lost, wait for the engine to cool down
before putting in cold coolant. This avoids damaging the engine. Large cool-
ant losses are an indication of leaks in the cooling system. See a special-
ised workshop immediately and have the cooling system checked. Other-
wise, there is a risk of engine damage.

250Technical specifications
Technical specifications
Checking fluid levels
From time to time, the levels of the different fluids in the ve-
hicle must be checked. Never fill with incorrect fluids, other-
wise serious damage to the engine may be caused.
Fig. 173 Diagram for the
location of the various el-
ements
Fig. 174 For vehicles
with the battery in the
luggage compartment.
Coolant expansion tank
Engine oil dipstick
Engine oil filler cap
Brake fluid reservoir
Vehicle battery
Windscreen washer fluid container
The checking and refilling of service fluids are carried out on the compo-
nents mentioned above. These operations are described in the ⇒ page 194.
Overview
You will find further explanations, instructions and restrictions on the tech-
nical specifications as of ⇒ page 246.
Note
The layout of parts may vary depending on the engine.
1
23456

Selective unlocking system . . . . . . . . . . . . . 78
Unlocking system . . . . . . . . . . . . . . . . . . . . . 79
Central locking button Locking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Unlocking . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Cetane number . . . . . . . . . . . . . . . . . . . . . . . . . 193
Changing bulbs interior light and reading light . . . . . . . . . 238
Changing bulbs on tail lights . . . . . . . . . . . . . 237
Changing gear see Manual gearbox . . . . . . . . . . . . . . . . . . 145
Changing gear in tiptronic mode . . . . . . . . . . 150
Changing single headlight bulbs Turn signal bulb . . . . . . . . . . . . . . . . . . . . . 229
Changing the AFS headlight bulbs Xenon lights . . . . . . . . . . . . . . . . . . . . . . . . 235
Changing the bulbs AFS headlight bulbs . . . . . . . . . . . . . . . . . . 235
fog light bulbs . . . . . . . . . . . . . . . . . . . . . . 236
luggage compartment light . . . . . . . . . . . . 239
number plate light . . . . . . . . . . . . . . . . . . . 238
Side turn signal lights . . . . . . . . . . . . . . . . 238
Changing the main headlight bulb turn signal lights . . . . . . . . . . . . . . . . . . . . 233
Changing the main headlight bulbs turn signal lights . . . . . . . . . . . . . . . . . . . . 235
Changing the single headlight bulbs Dipped/main beam . . . . . . . . . . . . . . . . . . 230
Side light . . . . . . . . . . . . . . . . . . . . . . . . . . 230
Changing windscreen wiper blades . . . . . . . . 204
Chassis number . . . . . . . . . . . . . . . . . . . . . . . . 247
Checking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209 Checking battery electrolyte level . . . . . . . . . . 209
Checking engine oil level . . . . . . . . . . . . . . . . . 198
Child safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Child seat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Categorisation in groups . . . . . . . . . . . . . . . 44
Group 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Group 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Group 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Groups 0 and 0+ . . . . . . . . . . . . . . . . . . . . . . 44
ISOFIX system . . . . . . . . . . . . . . . . . . . . . . . . 47
Safety notes . . . . . . . . . . . . . . . . . . . . . . . . . 42
Securing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Child seats on the front passenger seat . . . . . . . . . . . . . 30
Top Tether system . . . . . . . . . . . . . . . . . . . . 48
Cigarette lighter . . . . . . . . . . . . . . . . . . . . . . . . 122
Cleaning alloy wheel rims . . . . . . . . . . . . . . . . 180
Cleaning chrome . . . . . . . . . . . . . . . . . . . . . . . 179
Cleaning engine compartment . . . . . . . . . . . . 181
Cleaning steel wheel rims . . . . . . . . . . . . . . . . 180
Cleaning windows . . . . . . . . . . . . . . . . . . . . . . 178
Climatronic automatic mode . . . . . . . . . . . . . . . . . . . . . 133
controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
General notes . . . . . . . . . . . . . . . . . . . . . . . 134
manual mode . . . . . . . . . . . . . . . . . . . . . . . 133
Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Cloth seat covers cleaning . . . . . . . . . . . . . . . . 182
Cockpit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Coming Home function . . . . . . . . . . . . . . . . . . . 98
Compartment for on-board documentation . . 118 Control
Exterior mirrors . . . . . . . . . . . . . . . . . . . . . . 109
Control lamps . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Control lighting . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Controls Electric windows . . . . . . . . . . . . . . . . . . . . . . 90
Convenience closing Sliding/tilting sunroof . . . . . . . . . . . . . . . . . 94
Windows . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Convenience opening Windows . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Coolant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 201
Coolant level . . . . . . . . . . . . . . . . . . . . . . . . . . . 201 Warning lamp . . . . . . . . . . . . . . . . . . . . . . . . 71
Coolant loss . . . . . . . . . . . . . . . . . . . . . . . . . . . 201
Coolant temperature Safety instructions . . . . . . . . . . . . . . . . . . . . 72
Warning lamp . . . . . . . . . . . . . . . . . . . . . . . . 71
Correct adjustment of front head restraints . . . 13
Correct sitting position Front passenger . . . . . . . . . . . . . . . . . . . . . . 12
Incorrect sitting position . . . . . . . . . . . . . . . 14
Cruise control Control lamp . . . . . . . . . . . . . . . . . . . . . . . . . 69
Cruise control system . . . . . . . . . . . . . . . . . . . . 158
Cruise speed . . . . . . . . . . . . . . . . . . . . . . . . . . . 158 Control lamp . . . . . . . . . . . . . . . . . . . . . . . . . 69
D Danger of fitting a child seat on the front pas- senger seat . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
268 Index

Dash panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Dash panel cleaning . . . . . . . . . . . . . . . . . . . . 181
Daytime running lights . . . . . . . . . . . . . . . . . . . 97
Deactivating front passenger airbagSafety notes . . . . . . . . . . . . . . . . . . . . . . . . . 41
Deactivating the airbag Front passenger airbag . . . . . . . . . . . . . . . . 40
Diesel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 193
Diesel engine Winter driving . . . . . . . . . . . . . . . . . . . . . . . 194
Diesel engine particulate filter . . . . . . . . . . . . 169
Differential lock . . . . . . . . . . . . . . . . . . . . . . . . 165
Differential lock fault (EDL) Warning lamp . . . . . . . . . . . . . . . . . . . . . . . . 68
Digital clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Dipped beam headlights . . . . . . . . . . . . . . . . . . 95
Disposal Airbags . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Seat belt tensioners . . . . . . . . . . . . . . . . . . . 27
Door lock cylinders . . . . . . . . . . . . . . . . . . . . . . 179
Door release lever . . . . . . . . . . . . . . . . . . . . . . . 51
Doors Childproof locks . . . . . . . . . . . . . . . . . . . . . . 81
Warning lamp . . . . . . . . . . . . . . . . . . . . . . . . 70
Double headlight . . . . . . . . . . . . . . . . . . . . . . . 231
Double headlight bulb change dipped beam headlights . . . . . . . . . . . . . . 233
main beam headlights . . . . . . . . . . . . . . . . 232
side light . . . . . . . . . . . . . . . . . . . . . . . . . . . 231
Driver see Correct sitting position . . . . . . . 10, 11, 12 Driveshaft differential
XDS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164
Drive wheel traction control system . . . . . . . . 163
Driving Driving abroad . . . . . . . . . . . . . . . . . . . . . . 172
Economically / Environmentally friendly . 170
With a trailer . . . . . . . . . . . . . . . . . . . . 173, 174
Driving abroad . . . . . . . . . . . . . . . . . . . . . . . . . 172 Headlights . . . . . . . . . . . . . . . . . . . . . . . . . 172
Driving safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Duplicate keys . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Dust filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
Dynamic headlight range control . . . . . . . . . . . 97
E
Economical driving . . . . . . . . . . . . . . . . . . . . . . 170
EDL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165 Warning lamp . . . . . . . . . . . . . . . . . . . . . . . . 67
Electrical sockets . . . . . . . . . . . . . . . . . . . . . . . 122
Electro-hydraulic steering Warning lamp . . . . . . . . . . . . . . . . . . . . . . . . 71
Electronic differential lock . . . . . . . . . . . . . . . . 165 Warning lamp . . . . . . . . . . . . . . . . . . . . . . . . 67
Electronic immobiliser . . . . . . . . . . . . . . . . . . . 138
Electronic Stability Programme . . . . . . . . . 68, 164 Description . . . . . . . . . . . . . . . . . . . . . . . . . 137
Electronic Stability Programme (ESP) Warning lamp . . . . . . . . . . . . . . . . . . . . . . . . 68
Emission control system Warning lamp . . . . . . . . . . . . . . . . . . . . . . . . 71 Engine
Running in . . . . . . . . . . . . . . . . . . . . . . . . . 167
Engine compartment Working in the engine compartment . . . . 194
Engine coolant . . . . . . . . . . . . . . . . . . . . . . . . . 201
Engine fault Warning lamp . . . . . . . . . . . . . . . . . . . . . . . . 66
Engine management Warning lamp . . . . . . . . . . . . . . . . . . . . . . . . 65
Engine oil Changing . . . . . . . . . . . . . . . . . . . . . . . . . . 200
Checking engine oil level . . . . . . . . . . . . . . 198
Oil properties . . . . . . . . . . . . . . . . . . . . . . . 198
Specifications . . . . . . . . . . . . . . . . . . . . . . . 197
Topping up . . . . . . . . . . . . . . . . . . . . . . . . . 199
Engine oil dipstick . . . . . . . . . . . . . . . . . . . . . . 198
Engine oil pressure Warning lamp . . . . . . . . . . . . . . . . . . . . . . . . 66
Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . 170 Environmental friendliness . . . . . . . . . . . . 171
Environmentally friendly driving . . . . . . . . . . . 170
Environmental tip Avoiding pollution . . . . . . . . . . . . . . . . . . . 189
ESP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68, 164 see also Electronic Stability Programme . . 137
Exhaust gas purification system . . . . . . . . . . . 168
Exterior mirrors . . . . . . . . . . . . . . . . . . . . . . . . . 178
External aerial . . . . . . . . . . . . . . . . . . . . . . . . . . 185
F
Fabric trim cleaning . . . . . . . . . . . . . . . . . . . . . 182
269
Index

Rear fog lightControl lamp . . . . . . . . . . . . . . . . . . . . . . . . . 95
Indicator lamp . . . . . . . . . . . . . . . . . . . . . . . 67
Rear head restraints . . . . . . . . . . . . . . . . . . . . . . 14
Rear seat folding down . . . . . . . . . . . . . . . . . . . . . . . . 116
Rear seats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
Rear shelf . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
Rear view mirrors . . . . . . . . . . . . . . . . . . . . . . . 107
Rear window automatic wiper/washer . . . . . . 106
Rear window heating Heating element wires . . . . . . . . . . . . . . . . 179
Rear window wiper . . . . . . . . . . . . . . . . . . . . . . 106
Recommended gear display . . . . . . . . . . . . . . . 56
Refuelling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188
Remote control key Buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Synchronising . . . . . . . . . . . . . . . . . . . . . . . . 84
Removing and fitting the wheel . . . . . . . . . . . 221
Repairs Airbags . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Replacement keys . . . . . . . . . . . . . . . . . . . . . . . 82
Replacement of parts . . . . . . . . . . . . . . . . . . . . 184
Rev counter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Reverse gear Manual gearbox . . . . . . . . . . . . . . . . . . . . . 145
Roll-back function Panorama/ tilting sunroof . . . . . . . . . . . . . . 94
Windows . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Roof aerial . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185
Roof rack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
Rubber seals . . . . . . . . . . . . . . . . . . . . . . . . . . . 179 Running in
Brake pads . . . . . . . . . . . . . . . . . . . . . . . . . 167
Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167
Tyres . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167
Running in tyres . . . . . . . . . . . . . . . . . . . . . . . . 167
S Safe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Safe driving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Safe Security system . . . . . . . . . . . . . . . . . . . . . 77
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Safety equipment . . . . . . . . . . . . . . . . . . . . . . . . . 7
Safety instructions Coolant temperature . . . . . . . . . . . . . . . . . . 72
Safety notes Airbags . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Deactivating front passenger airbag . . . . . . 41
Front airbags . . . . . . . . . . . . . . . . . . . . . . . . 36
Seat belt tensioners . . . . . . . . . . . . . . . . . . . 27
Side airbags . . . . . . . . . . . . . . . . . . . . . . . . . 38
Using child seats . . . . . . . . . . . . . . . . . . . . . 42
Using seat belts . . . . . . . . . . . . . . . . . . . . . . 22
Seals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179
Seat adjustment . . . . . . . . . . . . . . . . . . . . 111, 114
Seat belt cleaning . . . . . . . . . . . . . . . . . . . . . . 183
Seat belt position Pregnant women . . . . . . . . . . . . . . . . . . . . . 25
Seat belts . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Seat belt protection . . . . . . . . . . . . . . . . . . . . . . 22
Seat belt release . . . . . . . . . . . . . . . . . . . . . . . . 26 Seat belts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Incorrectly fastened . . . . . . . . . . . . . . . . . . . 27
Not worn . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Safety notes . . . . . . . . . . . . . . . . . . . . . . . . . 22
Warning lamp . . . . . . . . . . . . . . . . . . . . . . . . 18
Seat belt tensioner Warning lamp . . . . . . . . . . . . . . . . . . . . . . . . 30
Seat belt tensioners . . . . . . . . . . . . . . . . . . . . . . 27
Seat belt warning lamp . . . . . . . . . . . . . . . . . . . 18
Seat heating . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
Selective opening . . . . . . . . . . . . . . . . . . . . . . . 78
Semiautomatic air conditioning controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
Service interval display . . . . . . . . . . . . . . . . . . . 59
Side airbags . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 Description . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Safety notes . . . . . . . . . . . . . . . . . . . . . . . . . 38
Side lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Single headlight bulb . . . . . . . . . . . . . . . . . . . 229
Sitting position Driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Front passenger . . . . . . . . . . . . . . . . . . . . . . 11
Sitting position, occupants . . . . . . . . . . . . . . . . 10
Snow chains . . . . . . . . . . . . . . . . . . . . . . . 215, 249
Soot accumulation in the diesel engine particu- late filter
Warning lamp . . . . . . . . . . . . . . . . . . . . . . . . 66
Spanner symbol . . . . . . . . . . . . . . . . . . . . . . . . . 60
Spare parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184
Spare wheel . . . . . . . . . . . . . . . . . . . . . . . . . . . 216
272 Index