
230Checking and refilling levels
Topping up the engine oil
Fig. 178 In the engine
compartment: Engine oil
filler cap
– Unscrew cap from oil filler opening ⇒ fig. 244.
– Carefully put in the specified grade of oil ⇒ page 228, adding
0.5 litres at a time.
– After two minutes, check the oil level once again ⇒ page 229.
– Where necessary, add more engine oil.
– Replace the oil filler cap carefully and push the dipstick all the
way in.
WARNING
● When refilling with oil, make sure no oil falls onto hot engine parts.
Failure to comply could result in fire.
● Wash your skin thoroughly if it comes into contact with engine oil.
CAUTION
● The oil level must never be above area a. This could damage the cata-
lytic converter or the engine. Contact a qualified workshop to drain the en-
gine oil if necessary.
● No additives should be used with engine oil. Any damage caused by the
use of such additives would not be covered by the factory warranty.
For the sake of the environment
● Oil must not be disposed of in the drain or on the ground.
● Always observe legal requirements when disposing of empty oil canis-
ters.
Cooling system Coolant fluid
The purpose of the coolant fluid is to carry heat away from
the engine. The correct amount of antifreeze is decisive in
preventing the cooling system from freezing in winter. The vehicle's engine cooling system is filled for life at the factory, so no
coolant needs to be changed. The coolant fluid consists of a mixture of wa-
ter and antifreeze G12++. This is a glycol-based antifreeze with anti-corro-
sion additives.
Coolant fluid additive
The amount of antifreeze required depends on the temperatures to be ex-
pected in the winter season. If the antifreeze concentration is too low the
coolant can freeze, resulting in failure of the cooling system and heater.

263
If and when
Fuse assignment
This list shows the fuses which can be replaced relatively
easily by the owner.
No.ConsumerAmps1Air conditioner102Footwell lamps53Heated washer jets54Radiator fan55Parking aid, automatic gearbox106Air conditioner (air purity sensor), pressure sensor5
7Electronic Stability Programme (ESP), brake light
switch, clutch pedal switch, steering angle sensor10
8Telephone59Vacant 10Adaptive headlights right5
11Airbag and disconnection of the front passenger air-
bag5
12Diagnostic socket1013Steering column unit1014Brake lights1015Instrument panel1016Vacant 17Tyre pressure control, rain/light sensor1018Adaptive headlights left519Vacant 20Vacant 21Vacant 22Driver door / front passenger door1523Rear doors15
No.ConsumerAmps24Central electrics unit for convenience equipment2025Heater blower3026Rear window heater3027Power socket for trailer (control unit)3028Fuel pump, auxiliary pump for diesel2029Vacant 30Sliding/tilting sunroof20
31Diagnosis connection, automatic anti-dazzle interior
mirror, reverse light, automatic gearbox15
32Towing socket1533Lighter2034Lambda probe heater1035Luggage compartment power socket*2036Wiper system30
37Pump for windscreen washer and headlight washer
system30
38Luggage compartment illumination, alarm1539Radio, amplifier2040Horn2541230 volt socket3042Electronic Stability Programme (ESP)2543Engine management1544Seat heating35
Some of the electrical items listed in the table are only fitted on certain
models or are optional extras.
The electric windows and electric seat adjusters are protected by circuit
breakers. These reset automatically after a few seconds when the overload
(caused for example by frozen windows) has been corrected.
Safety FirstOperating InstructionsPractical TipsTechnical Specifications

287
If and when
How to jump start: description
Fig. 241 How to connect
the jump leads
On ⇒ fig. 241 A
shows the flat battery and B the charged bat-
tery.
Jump lead terminal connections
– Switch off the ignition of both vehicles ⇒
.
1. Connect one end of the red jump lead to the positive ⇒ fig. 241
+
terminal of the vehicle with the flat battery ⇒ .
2. Connect the other end of the red jump lead to the positive ter- minal +
in the vehicle providing assistance.
3. Connect one end of the black jump lead to the negative termi- nal -
on the battery of the vehicle providing assistance.
4. Connect the other end of the black jump lead X
to a solid met-
al component which is bolted on to the engine block, or onto the engine block itself of the vehicle with the flat battery. Do not
connect it to a point near the battery
⇒
.
5. Position the leads in such a way that they cannot come into contact with any moving parts in the engine compartment.
Starting
6. Start the engine of the vehicle with the boosting battery and let it run at idling speed.
7. Start the engine of the vehicle with the flat battery and wait one or two minutes until the engine is running.
Removing the jump leads
8. Before you remove the jump leads, switch off the headlights (if they are switched on).
9. Turn on the heater blower and heated rear window in the vehi- cle with the flat battery. This helps minimise voltage peaks
which are generated when the leads are disconnected.
10. When the engine is running, disconnect the leads in reverse order to the details given above.
Connect the battery clamps so they have good metal-to-metal contact with
the battery terminals.
If the engine fails to start, switch off the starter after about 10 seconds and
try again after about half a minute.
Safety FirstOperating InstructionsPractical TipsTechnical Specifications

Index
Numbers and Symbols
230 V socket . . . . . . . . . . . . . . . . . . . . . . . . . . . 156
A
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220 Towing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203
Adaptive headlights . . . . . . . . . . . . . . . . . . . . . 121 Faulty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Airbag Warning lamp . . . . . . . . . . . . . . . . . . . . . . . . 66
Airbag covers . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Airbag system . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 Curtain airbags . . . . . . . . . . . . . . . . . . . . . . . 42
Front airbags . . . . . . . . . . . . . . . . . . . . . . . . 33
Side airbags . . . . . . . . . . . . . . . . . . . . . . . . . 39
Warning lamp . . . . . . . . . . . . . . . . . . . . . . . . 31
Air conditioner 2C-Climatronic . . . . . . . . . . . . . . . . . . . . . . 161
Air distribution . . . . . . . . . . . . . . . . . . . . . . 168
Air outlets . . . . . . . . . . . . . . . . . . . . . . . . . . 168
Air purity sensor . . . . . . . . . . . . . . . . . . . . . 166
Air recirculation . . . . . . . . . . . . . . . . . . . . . 165
Air recirculation (automatic) . . . . . . . . . . . 166
Automatic mode . . . . . . . . . . . . . . . . . . . . . 164
Blower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167
Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163
Defrosting . . . . . . . . . . . . . . . . . . . . . . . . . . 165
ECON Mode (economy) . . . . . . . . . . . . . . . 165 Economical use . . . . . . . . . . . . . . . . . . . . . 169
Key settings . . . . . . . . . . . . . . . . . . . . . . . . 169
Solar-powered blower/sunroof . . . . . . . . . 169
Temperature selection . . . . . . . . . . . . . . . . 164
Air duct Fitting . . . . . . . . . . . . . . . . . . . . . . . . . 266, 273
Removing . . . . . . . . . . . . . . . . . . . . . . 266, 272
Air purity sensor . . . . . . . . . . . . . . . . . . . . . . . . 166
Alternator Warning lamp . . . . . . . . . . . . . . . . . . . . . . . . 69
Ambient lighting . . . . . . . . . . . . . . . . . . . . . . . 124
Anti-lock brake system How it works . . . . . . . . . . . . . . . . . . . . . . . . 191
Anti-theft alarm system . . . . . . . . . . . . . . . . . . 107 Interior monitoring . . . . . . . . . . . . . . . . . . . 108
Antifreeze . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 230
Aquaplaning . . . . . . . . . . . . . . . . . . . . . . . . . . . 246
Armrest Storage compartment in front armrest . . . 142
Armrests Adjusting the front armrest . . . . . . . . . . . . 141
Ashtray Front . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
Rear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
Athermic windscreen . . . . . . . . . . . . . . . . . . . . 221
Auto-check system . . . . . . . . . . . . . . . . . . . . . . . 75
Automatic car wash tunnel . . . . . . . . . . . . . . . 212 Automatic gearbox
Dynamic gear control programme . . . . . . . 187
Kick-down feature . . . . . . . . . . . . . . . . . . . . 186
multitronic® . . . . . . . . . . . . . . . . . . . . . . . . 182
Paddle levers (tiptronic mode) . . . . . . . . . 189
Safety interlock for ignition key . . . . . . . . . 172
Selector lever lock . . . . . . . . . . . . . . . . . . . 186
Selector lever positions . . . . . . . . . . . . . . . 184
Steering wheel with paddle levers . . . . . . 189
tiptronic . . . . . . . . . . . . . . . . . . . . . . . . . . . 182
tiptronic mode . . . . . . . . . . . . . . . . . . . . . . 188
Automatic headlight control . . . . . . . . . . . . . . 115
Auxiliary heater . . . . . . . . . . . . . . . . . . . . . . . . 170
B
Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 237 Battery voltage . . . . . . . . . . . . . . . . . . . . . . . 81
Charging . . . . . . . . . . . . . . . . . . . . . . . . . . . 239
Disconnection . . . . . . . . . . . . . . . . . . . . . . . 237
Long periods of non-use . . . . . . . . . . . . . . 237
Replacing . . . . . . . . . . . . . . . . . . . . . . 237, 238
Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 237
Winter operation . . . . . . . . . . . . . . . . 237, 238
Bicycle rack Towing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203
Biodiesel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 224
Biodiesel fuel . . . . . . . . . . . . . . . . . . . . . . . . . . 224
307
Index