249
Checking and refilling levels
A highly explosive mixture of gases is released when the bat-
tery is under charge.
Keep children away from acid and batteries!
WARNING
Always be aware of the danger of injury and chemical burns as well as
the risk of accident or fire when working on the battery and the electrical
system:
● Wear eye protection. Protect your eyes, skin and clothing from acid
and particles containing lead.
● Battery acid is extremely corrosive. Wear protective gloves and eye
protection. Do not tilt the batteries. This could spill acid through the
vents. Rinse battery acid from eyes immediately for several minutes with
clear water. Then seek medical care immediately. Neutralise any acid
splashes on the skin or clothing with a soapy solution, and rinse off with
plenty of water. If acid is swallowed by mistake, consult a doctor immedi-
ately.
● Fires, sparks, open flames and smoking are prohibited. When han-
dling cables and electrical equipment, avoid causing sparks and electro-
static charge. Never short the battery terminals. High-energy sparks can
cause injury.
● A highly explosive mixture of gases is released when the battery is
under charge. The batteries should be charged in a well-ventilated room
only.
● Keep children away from acid and batteries.
● Before working on the electrical system, you must switch off the en-
gine, the ignition and all consumers. The negative cable on the battery
must be disconnected. When a light bulb is changed, you need only
switch off the light.
WARNING (Continued)
● Deactivate the anti-theft alarm by unlocking the vehicle before you
disconnect the battery! The alarm will otherwise be triggered.
● When disconnecting the battery from the vehicle on-board network,
disconnect first the negative cable and then the positive cable.
● Switch off all electrical consumers before reconnecting the battery.
Reconnect first the positive cable and then the negative cable. Never re-
verse the polarity of the connections. This could cause an electrical fire.
● Never charge a frozen battery, or one which has thawed. This could
result in explosions and chemical burns. Always replace a battery which
has frozen. A flat battery can freeze at temperatures around 0 °C.
● Ensure that the vent hose is always connected to the battery.
● Never use a defective battery. This could cause an explosion. Replace
a damaged battery immediately.
CAUTION
● Never disconnect the battery if the ignition is switched on or if the en-
gine is running. This could damage the electrical system or electronic com-
ponents.
● Do not expose the battery to direct sunlight over a long period of time,
as the intense ultraviolet radiation can damage the battery housing.
● If the vehicle is left standing in cold conditions for a long period, protect
the battery from freezing. If it freezes it will be damaged.
Charging the battery
A fully-charged battery is important for reliable starting. – Note the warnings ⇒
in Important safety warnings for han-
dling a vehicle battery on page 249 and ⇒ .
Safety FirstOperating instructionsPractical TipsTechnical Specifications
250Checking and refilling levels
–Switch off the ignition and all electrical equipment.
– Only if fast-charging: both battery cables must be disconnected
(first the negative cable, then the positive cable).
– Connect the charger cables to the battery terminals, noting the
colour code (red = positive; black or brown = negative).
– Now connect the battery charger to the power socket and switch
on.
– After charging the battery: switch off the battery charger and
disconnect the power socket cable.
– Finally disconnect the charger cables from the battery.
– If necessary, reconnect both battery cables to the battery (first
the positive cable, then the negative cable).
When charging with a low current (for instance with a small battery charger)
the battery does not normally have to be disconnected. However, both bat-
tery cables must be disconnected before fast-charging the battery with a
high current. However, always follow the instructions given by the manufac-
turer of the battery charger.
The fast-charging procedure for a battery is dangerous ⇒
in Important
safety warnings for handling a vehicle battery on page 249, as it requires a
special charger and the corresponding level of knowledge. We therefore rec-
ommend that this work should only be performed by a specialised work-
shop.
A flat battery can freeze at temperatures of around 0 °C. The battery must be
defrosted before charging ⇒
. It is advisable to replace the battery if it has
frozen, because the ice can crack the battery casing and allow the battery
acid to escape.
The battery caps should not be opened while the battery is being charged.
WARNING
Never charge a frozen battery. Failure to comply could result in an explo-
sion.
Index
Numbers and Symbols
230 V socket . . . . . . . . . . . . . . . . . . . . . . . . . . . 158
A
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . 230 Towing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 210
Adaptive headlights . . . . . . . . . . . . . . . . . . . . . 123 Faulty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Airbag Warning lamp . . . . . . . . . . . . . . . . . . . . . . . . 68
Airbag covers . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Airbag system . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 control lamp . . . . . . . . . . . . . . . . . . . . . . . . . 31
Curtain airbags . . . . . . . . . . . . . . . . . . . . . . . 42
Front airbags . . . . . . . . . . . . . . . . . . . . . . . . 33
side airbags . . . . . . . . . . . . . . . . . . . . . . . . . 39
Air conditioner 2C-Climatronic . . . . . . . . . . . . . . . . . . . . . . 163
Air distribution . . . . . . . . . . . . . . . . . . . . . . 170
Air outlets . . . . . . . . . . . . . . . . . . . . . . . . . . 170
Air purity sensor . . . . . . . . . . . . . . . . . . . . . 168
Air recirculation . . . . . . . . . . . . . . . . . . . . . 167
Air recirculation (automatic) . . . . . . . . . . . 168
Automatic mode . . . . . . . . . . . . . . . . . . . . . 166
Blower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169
Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165
Defrosting . . . . . . . . . . . . . . . . . . . . . . . . . . 167
ECON Mode (economy) . . . . . . . . . . . . . . . 167 Economical use . . . . . . . . . . . . . . . . . . . . . 171
Key settings . . . . . . . . . . . . . . . . . . . . . . . . 171
Solar-powered blower/sunroof . . . . . . . . . 171
Temperature selection . . . . . . . . . . . . . . . . 166
Air duct Fitting . . . . . . . . . . . . . . . . . . . . . . . . . 276, 283
Removing . . . . . . . . . . . . . . . . . . . . . . 276, 282
Air purity sensor . . . . . . . . . . . . . . . . . . . . . . . . 168
Alcantara . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 226
Alternator Warning lamp . . . . . . . . . . . . . . . . . . . . . . . . 72
Ambient lighting . . . . . . . . . . . . . . . . . . . . . . . 126
Anti-lock brake system How it works . . . . . . . . . . . . . . . . . . . . . . . . 197
Anti-theft alarm system . . . . . . . . . . . . . . . . . . 110 Interior monitoring . . . . . . . . . . . . . . . . . . . 111
Antifreeze . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 240
Aquaplaning . . . . . . . . . . . . . . . . . . . . . . . . . . . 256
Armrest Storage compartment in front armrest . . . 144
Armrests Adjusting the front armrest . . . . . . . . . . . . 144
Ashtray Front . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155
Rear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156
ASR Control lamp . . . . . . . . . . . . . . . . . . . . . . . . . 71
How the system works . . . . . . . . . . . . . . . . 198
Athermic windscreen . . . . . . . . . . . . . . . . . . . . 231 Auto-check system . . . . . . . . . . . . . . . . . . . . . . . 78
Automatic car wash tunnel . . . . . . . . . . . . . . . 219
Automatic gearbox
Dynamic gear control programme . . . . . . . 192
Kick-down feature . . . . . . . . . . . . . . . . . . . . 192
multitronic® . . . . . . . . . . . . . . . . . . . . . . . . 188
Paddle levers (tiptronic mode) . . . . . . . . . 194
Safety interlock for ignition key . . . . . . . . . 174
Selector lever lock . . . . . . . . . . . . . . . . . . . 191
Selector lever positions . . . . . . . . . . . . . . . 190
Steering wheel with paddle levers . . . . . . 194
tiptronic . . . . . . . . . . . . . . . . . . . . . . . . . . . 188
tiptronic mode . . . . . . . . . . . . . . . . . . . . . . 193
Automatic headlight control . . . . . . . . . . . . . . 117
Auxiliary heater . . . . . . . . . . . . . . . . . . . . . . . . 172
B
Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 247 Battery voltage . . . . . . . . . . . . . . . . . . . . . . . 84
Charging . . . . . . . . . . . . . . . . . . . . . . . . . . . 249
Disconnection . . . . . . . . . . . . . . . . . . . . . . . 248
Long periods of non-use . . . . . . . . . . 247, 248
Replacing . . . . . . . . . . . . . . . . . . . . . . 247, 248
Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 247
Winter operation . . . . . . . . . . . . . . . . 247, 248
Bicycle rack Towing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 210
Biodiesel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 234
Biodiesel fuel . . . . . . . . . . . . . . . . . . . . . . . . . . 234
315
Index