
Checking and refilling levels227
Safety First
Operating instructions
Tips and Maintenance
Te c h n i c a l D a t a
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
engine, 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.
•
Deactivate the anti-theft alarm by unlocking the vehicle before you
disconnect the battery! The alar m will otherwise be triggered.
•
When disconnecting the battery from the vehicle electrical system,
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
reverse 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 may be fatally explosive. Replace a
damaged battery immediately.Caution
•
Never disconnect the battery if the ignition is switched on or if the engine
is running. This could damage the electrical system or electronic compo-
nents.
•
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 frost. If it “freezes” it will be damaged.
Checking the electrolyte level
The electrolyte level should be checked regularly in high-
mileage vehicles, in hot countries and in older batteries.– Open the bonnet and open the battery cover at the front ⇒ in
“Safety instructions on working in the engine compartment” on
page 212 ⇒ in “Warnings on handling the battery” on
page 226.
– Check the colour display in the "magic eye" on the top of the battery.
– If there are air bubbles in the window, tap the window gently until they disperse.The position of the battery is show n in the corresponding engine compart-
ment diagram ⇒page 276.
The round window (“magic eye”) on the top of the battery changes colour,
depending on the charge level and electrolyte level of the battery.
If the colour in the window is colourless or bright yellow, the electrolyte level
of the battery is too low. Have the battery checked by a qualified workshop.
The colours green and black are used by the workshops for diagnostic
purposes.
WARNING (continued)
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If and when
250
21 Cable control unit 7,5
22 Volumetric alarm sensor/ Alarm horn 5
23 Diagnosis / Rain sensor / Light switch 10
24 Vacant
25 Switchboard coupling automatic gearbox 20
26 Vacuum pump 20
27 RSE input (roof screen) 10
28 Rear wiper motor / Switchboard wiring 20
29 Vacant
30 Cigarette lighter / socket 20
31 Vacant
32 Vacant
33 Heater 40
34 Vacant
35 Vacant
36 Engine management 10
37 Engine management 10
38 Engine management 10
39 Trailer control unit (coupling) 15
40 Trailer control unit (indicat ors, brakes and left side) 20
41 Trailer control unit (fog light, reversing light and right side) 20
42 Vacant
43 Trailer pre-installation 40
44 Rear window heater 25
Number
Consumer Amperes
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Index297
Index
AABS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180
Warning lamp . . . . . . . . . . . . . . . . . . . . . . . . . 78
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207
Acoustic signal . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Acoustic warning . . . . . . . . . . . . . . . . . . . . . . . . 162
Adjusting simp le headlights
driving on the left . . . . . . . . . . . . . . . . . . . . 188
driving on the right . . . . . . . . . . . . . . . . . . . 188
Adjusting the seat belt height . . . . . . . . . . . . . . 27
Adjustments for Bixenon headlights driving on the left . . . . . . . . . . . . . . . . . . . . 190
driving on the right . . . . . . . . . . . . . . . . . . . 190
Air conditioner* 2C-Climatronic* . . . . . . . . . . . . . . . . . . . . . . 155
Air conditioning system General notes . . . . . . . . . . . . . . . . . . . . . . . . 159
Air conditioning* . . . . . . . . . . . . . . . . . . . . . . . . 152
Air recirculation mode 2C-Climatronic . . . . . . . . . . . . . . . . . . . . . . . 158
Manual air conditioning . . . . . . . . . . . . . . . 154
Airbag covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Airbag system . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 Curtain airbags . . . . . . . . . . . . . . . . . . . . . . . 41
Front airbags . . . . . . . . . . . . . . . . . . . . . . . . . 34
Side airbags . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Warning lamp . . . . . . . . . . . . . . . . . . . . . . . . . 31 Airbags
Care . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Safety notes . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Alarm system Switching off . . . . . . . . . . . . . . . . . . . . . . . . 102
Alterations to the vehicle . . . . . . . . . . . . . . . . . 207
Alternator Warning lamp . . . . . . . . . . . . . . . . . . . . . . . . . 79
Ambient temperature display . . . . . . . . . . . . . . . 63
Anti-freeze . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 219
Anti-lock brake system . . . . . . . . . . . . . . . . . . . 180 Warning lamp . . . . . . . . . . . . . . . . . . . . . . . . . 78
Anti-theft alarm system . . . . . . . . . . . . . . . . . . . 102 Switching off . . . . . . . . . . . . . . . . . . . . . . . . 102
Anti-theft wheel bolts . . . . . . . . . . . . . . . . . . . . 241
Apple iPod connector . . . . . . . . . . . . . . . . . . . . 145
Aquaplaning . . . . . . . . . . . . . . . . . . . . . . . . . . . 232
Ashtray* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143
Automatic anti-dazzle interior mirror* Activating the anti-dazzle function . . . . . . 125
Deactivating anti-dazzle function . . . . . . . . 125
Automatic car wash tunnel . . . . . . . . . . . . . . . . 199
Automatic gearbox / DS G automatic gearbox . 167
Automatic lighting . . . . . . . . . . . . . . . . . . . . . . . 112
Automatic mode 2C-Climatronic . . . . . . . . . . . . . . . . . . . . . . . 156 Automatic wiper/wash function for the rear window
124
Auxiliary audio connection: AUX-IN . . . . . . . . . 144
BBall coupling . . . . . . . . . . . . . . . . . . . . . . . . . . . 195
BAS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179
Battery Changing . . . . . . . . . . . . . . . . . . . . . . . . . . . 228
Charging . . . . . . . . . . . . . . . . . . . . . . . . . . . . 228
Winter conditions . . . . . . . . . . . . . . . . . . . . 226
Belt tension device Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Warning lamp . . . . . . . . . . . . . . . . . . . . . . . . 31
Belt tension devices . . . . . . . . . . . . . . . . . . . . . . 28
Biodiesel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211
Bonnet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214
Brake assist system . . . . . . . . . . . . . . . . . . . . . 179
Brake fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 225 Changing . . . . . . . . . . . . . . . . . . . . . . . . . . . 225
Warning lamp . . . . . . . . . . . . . . . . . . . . . . . . 64
Brake pad wear indicator* Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Brake pads . . . . . . . . . . . . . . . . . . . . . . . . 184, 186
Brake servo . . . . . . . . . . . . . . . . . . . . . . . 179, 184
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