185
Vehicle maintenance and cleaning
If possible, use a de-icing spray to remove ice. If you use an ice scraper,
push it in one direction only without swinging it.
Use window cleaner or a silicone remover to clean rubber, oil, grease and
silicone deposits off.
Wax deposits can be removed with a special cleaner available in your Tech-
nical Services. Wax deposits on the windscreen could cause the wiper
blades to judder. Adding a window cleaner that dissolves wax to the wind-
screen washer fluid prevents wiper blades from juddering, but wax deposits
are not removed.
CAUTION
● Never use warm or hot water to remove snow and ice from windows and
mirrors. This could cause the glass to crack!
● The heating element for the rear window is located on the inner side of
the window. To prevent damage, do not put stickers over the heating ele-
ments on the inside of the window.
Cleaning windscreen wiper blades
Clean wiper blades improve visibility.
1. Use a soft cloth to remove dust and dirt from the windscreen wiper blades.
2. Use window cleaner to clean the windscreen wiper blades. Use a sponge or a cloth to remove stubborn dirt. Rubber seals maintenance
If rubber seals are well looked after, they will not freeze so
quickly.
1. Use a soft cloth to remove dust and dirt from the rubber seals.
2. Apply a specialist care product to the rubber seals.
The rubber strips on the doors, windows, bonnet and rear lid will remain
pliable and last longer if they are treated with a suitable care product (for
example silicone spray).
Caring for rubber seals will also prevent premature ageing and leaks. The
doors will be easier to open. If rubber seals are well looked after, they will
not freeze so quickly in winter.
Door lock cylinders
The door lock cylinders can freeze up in winter.
To de-ice the lock cylinders you should only use spray with lubricating and
anti-corrosive properties.
Cleaning chrome parts
1. Clean chrome parts with a damp cloth.
2. Polish chrome parts with a soft, dry cloth. If this does not provide satisfying results, use a specialist chrome cleaning
product. Chrome cleaning products will remove stains from the surface.
Safety FirstOperating InstructionsPractical TipsTechnical Specifications
211
Checking and refilling levels
To change the blades it is necessary to change the rest position of
the wipers to the service position.
Do not change the windscreen wipers when out of the service posi-
tion, as it could cause paint to flake off the bonnet due to friction
with the windscreen wiper arm.
Service position (For changing wiper blades)
– Ensure that the wiper blades are not frozen.
– Turn ignition on and off and then (before approx. 9 sec.) move
the windscreen wiper lever to the intermittent wipe position.
The windscreen wipers will move to the service position
⇒ Fig. 137.
Removing the wiper blade
– Lift the windscreen wiper arm.
– Press on the securing tab ⇒ Fig. 138.
– Extract the wiper blade from the wiper arm.
Fitting the wiper blade
– Insert the wiper blade onto the windscreen wiper arm until it
clicks into place.
– Place the windscreen wiper arms to their initial position.
If the windscreen wipers smear , they should be replaced if they are dam-
aged, or cleaned if they are soiled.
If this does not produce the desired results, the setting angle of the wind-
screen wiper arms might be incorrect. They should be checked by a special-
ised workshop and corrected if necessary.
WARNING
Do not drive unless you have good visibility through all windows!
● Clean the windscreen wiper blades and all windows regularly.
● The wiper blades should be changed once or twice a year.
CAUTION
● Damaged or dirty windscreen wipers could scratch the windscreen.
● Never use fuel, nail varnish remover, paint thinner or similar products to
clean the windows. This could damage the windscreen wiper blades.
● Never move the windscreen wiper or windscreen wiper arm manually.
This could cause damage.
● To avoid damage to the bonnet and the windscreen wiper arms, the lat-
ter should only be lifted off the windscreen when in service position.
Note
● The windscreen wiper arms can be moved to the service position only
when the bonnet is properly closed.
● You can also use the service position, for example, if you want to fix a
cover over the windscreen in the winter to keep it clear of ice.
Safety FirstOperating InstructionsPractical TipsTechnical Specifications
212Checking and refilling levels
Changing the rear wiper blade
A good rear wiper blade is essential for clear rear vision.
Damaged wiper blades should be replaced immediately.
Fig. 139 Removing the
rear window wiper blade
Fig. 140 Fitting the rear
window wiper blade Removing the wiper blade
–
Lift the wiper arm away from the glass ⇒ Fig. 139.
– Slide the blade adapter in the direction of the arrow and remove
the blade ⇒ Fig. 139.
Fitting the wiper blade
– With one hand, hold the top end of the wiper arm.
– Place the blade as shown in the ⇒ Fig. 140 and slide the adapt-
er along until it engages.
Check the condition of the wiper blade regularly. Change as required.
If the windscreen wiper scrapes, it should be replaced if damaged, or
cleaned if soiled.
If this is not sufficient, refer to a specialised workshop.
WARNING
Do not drive unless you have good visibility through all windows!
● Clean the windscreen wiper blades and all windows regularly.
● The wiper blades should be changed once or twice a year.
CAUTION
● A damaged or dirty window wiper could scratch the rear window.
● Never use fuel, nail varnish remover, paint thinner or similar products to
clean the window.
● Never move the windscreen wiper by hand. This could cause damage.
215
Checking and refilling levels
WARNING (Continued)
● 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.
● 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.
● For vehicles with the battery in the luggage compartment: Check that
the battery gas ventilation hose is securely attached.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.
Checking the electrolyte level
The electrolyte level should be checked regularly in high-
mileage vehicles, in hot countries and in older batteries. – Open the engine bonnet and the battery cover ⇒
in Safety in-
structions on working in the engine compartment on page 201
⇒
in Warnings on handling the battery on page 214.
– 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 shown in the corresponding engine compart-
ment diagram ⇒ page 259.
The “magic eye” indicator, located on the top of the battery changes colour,
depending on the charge state and electrolyte level of the battery.
There are two different colours:
Safety FirstOperating InstructionsPractical TipsTechnical Specifications
233
If and when
NumberConsumerAmps42Horn2043Panoramic roof3044Windscreen wipers2045Heated rear window30
46Radio/Bluetooth/USB + AUX-In/DC-DC converter
for Start-Stop20
47Climatronic/autoclima/Diagnosis/Automatic
gearbox (ZSS lock)5
48Locking unit2549Front left window raiser2550Rear electric windows3051Right front window raiser2552Alarm15
53Electro-kinetic pump relay/bi-turbo fuel control
unit15
54Reverse light d)
/ Fog light/ Cornering light1555Transformer on15, 20 b)56Rear window wiper10
57Left daytime running light/ Turn signals/ Right
dipped beam/ Number plate light c)15
58Right daytime running light/ Rear fog light/ Left
dipped beam/ Main bean relay/ X Relay c)15
a)
If it is LPG.
b) Ampere rating according to motorisation.
c) If Start-Stop is installed, lights and/or AFS are automatically switched on.
d) Only with automatic transmission and/or Start-Stop, automatic light-on and/or AFS. Fuses below steering wheel in relay holder
PTC fuses
NumberConsumerAmps1Supplementary electrical heating using air402Supplementary electrical heating using air403Supplementary electrical heating using air40
AUX 1 Fuses
NumberConsumerAmps1Navigator, Bluetooth, MDI, radio control lever202Instrument panel/ESC Relay5
AUX 2 Fuses
NumberConsumerAmps1Headlight washer pump20
AUX 3 Fuses
NumberConsumerAmps1Trailer control unit152Trailer control unit203Trailer control unit20
Safety FirstOperating InstructionsPractical TipsTechnical Specifications
250If and when
–Connect one end of the red jump lead to the positive +
termi-
nal of the vehicle with the flat battery A ⇒ Fig. 179.
– Connect the other end of the red jump lead to the positive ter-
minal +
in the vehicle providing assistance B.
– Connect one end of the black jump lead X
to a suitable ground
terminal, a solid piece of metal in the engine block, or to the en-
gine block ⇒ Fig. 179.
– Connect the other end of the black jump lead X
to a solid met-
al component bolted to the engine block or to the engine block
itself of the vehicle with the flat battery. However, connect it to
a point as far as possible from the battery A
.
4. Position the leads in such a way that they cannot come into contact with any moving parts in the engine compartment.
Starting
5. Start the engine of the vehicle with the boosting battery and let it run at idling speed.
6. Start the engine of the vehicle with the flat battery and wait two or three minutes until the engine is “running”.
Removing the jump leads
7. Before you remove the jump leads, switch off the dipped beam headlights (if they are switched on).
8. 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.
9. When the engine is running, disconnect the leads in reverse or- der 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.
WARNING
● Please note the safety warnings referring to working in the engine
compartment ⇒ page 200, Working in the engine compartment.
● The battery providing assistance must have the same voltage as the
flat battery (12V) and approximately the same capacity (see imprint on
battery). Failure to comply could result in an explosion.
● Never use jump leads when one of the batteries is frozen. Danger of
explosion! Even after the battery has thawed, battery acid could leak and
cause chemical burns. If a battery freezes, it should be replaced.
● Keep sparks, flames and lighted cigarettes away from batteries, dan-
ger of explosion. Failure to comply could result in an explosion.
● Observe the instructions provided by the manufacturer of the jump
leads.
● Do not connect the negative cable from the other vehicle directly to
the negative terminal of the flat battery. The gas emitted from the battery
could be ignited by sparks. Danger of explosion.
● Do not attach the negative cable from the other vehicle to parts of the
fuel system or to the brake line.
● The non-insulated parts of the battery clamps must not be allowed to
touch. The jump lead attached to the positive battery terminal must not
touch metal parts of the vehicle, this can cause a short circuit.
● Position the leads in such a way that they cannot come into contact
with any moving parts in the engine compartment.
● Do not lean on the batteries. This could result in chemical burns.
C
Car care Exterior . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182
Car phone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191
Catalytic converter . . . . . . . . . . . . . . . . . . . . . . 174
CCS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164
Central lock button Locking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
Unlocking . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
Central locking . . . . . . . . . . . . . . . . . . . . . . . . . . 82 Automatic speed dependent locking andunlocking system* . . . . . . . . . . . . . . . . . . 84
Emergency unlocking system . . . . . . . . . . . 85
Locking system for involuntary unlocking . 84
Selective unlocking system* . . . . . . . . . . . . 83
Unlocking system* . . . . . . . . . . . . . . . . . . . . 84
Cetane number . . . . . . . . . . . . . . . . . . . . . . . . . 199
Changing bulbs interior light and front reading lights . . . . 247
Changing gear see Manual gearbox . . . . . . . . . . . . . . . . . . 153
Changing gear in tiptronic mode . . . . . . . . . . 157
Changing rear lights on the rear lid . . . . . . . . . . . . . . . . . . . . . . . 245
on the wing . . . . . . . . . . . . . . . . . . . . . . . . . 244
Changing single headlight bulbs Turn signal bulb . . . . . . . . . . . . . . . . . . . . . 236
Changing the AFS headlight bulbs Xenon lights . . . . . . . . . . . . . . . . . . . . . . . . 242
Changing the bulbs AFS headlight bulbs . . . . . . . . . . . . . . . . . . 242
fog light bulbs . . . . . . . . . . . . . . . . . . . . . . 243 Luggage compartment light . . . . . . . . . . . 248
number plate light . . . . . . . . . . . . . . . . . . . 247
Side turn signal lights . . . . . . . . . . . . . . . . 246
Changing the main headlight bulb turn signal lights . . . . . . . . . . . . . . . . . . . . 240
Changing the main headlight bulbs turn signal lights . . . . . . . . . . . . . . . . . . . . 242
Changing the single headlight bulbs Dipped/main beam . . . . . . . . . . . . . . . . . . 237
Side light . . . . . . . . . . . . . . . . . . . . . . . . . . 237
Changing windscreen wiper blades . . . . . . . . 210
Chassis number . . . . . . . . . . . . . . . . . . . . . . . . 256
Checking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 215
Checking battery electrolyte level . . . . . . . . . . 215
Checking engine oil level . . . . . . . . . . . . . . . . . 205
Child safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Child seat Categorisation in groups . . . . . . . . . . . . . . . 45
Group 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Group 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Group 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Groups 0 and 0+ . . . . . . . . . . . . . . . . . . . . . . 45
Safety notes . . . . . . . . . . . . . . . . . . . . . . . . . 43
Securing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Child seats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 ISOFIX system . . . . . . . . . . . . . . . . . . . . . . . . 49
on the front passenger seat . . . . . . . . . . . . . 31
Top Tether system . . . . . . . . . . . . . . . . . . . . 50
Cigarette lighter . . . . . . . . . . . . . . . . . . . . . . . . 126
Cleaning alloy wheel rims . . . . . . . . . . . . . . . . 186
Cleaning chrome . . . . . . . . . . . . . . . . . . . . . . . 185
Cleaning engine compartment . . . . . . . . . . . . 187 Cleaning steel wheel rims . . . . . . . . . . . . . . . . 186
Cleaning windows . . . . . . . . . . . . . . . . . . . . . . 184
Climatronic
automatic mode . . . . . . . . . . . . . . . . . . . . . 141
controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140
General notes . . . . . . . . . . . . . . . . . . . . . . . 142
manual mode . . . . . . . . . . . . . . . . . . . . . . . 141
Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Cloth seat covers cleaning . . . . . . . . . . . . . . . . 188
Cockpit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Coming Home function . . . . . . . . . . . . . . . . . . 104
Compartment for on-board documentation . . 122
Control Exterior mirrors . . . . . . . . . . . . . . . . . . . . . . 113
control lamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Control lamps . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Control lighting . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Controls Electric windows . . . . . . . . . . . . . . . . . . . . . . 95
Convenience closing Sliding/tilting sunroof . . . . . . . . . . . . . . . . . 99
Windows . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
Convenience opening Windows . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
Coolant . . . . . . . . . . . . . . . . . . . . . . . . . . . 207, 208
Coolant level . . . . . . . . . . . . . . . . . . . . . . . . . . . 208 control lamp . . . . . . . . . . . . . . . . . . . . . . . . . 75
Coolant loss . . . . . . . . . . . . . . . . . . . . . . . . . . . 208
Coolant temperature control lamp . . . . . . . . . . . . . . . . . . . . . . . . . 75
Safety instructions . . . . . . . . . . . . . . . . . . . . 76
Correct adjustment of front head restraints . . . 13
272 Index
Engine oil pressurecontrol lamp . . . . . . . . . . . . . . . . . . . . . . . . . 70
Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . 176 Environmental friendliness . . . . . . . . . . . . 177
Environmentally friendly driving . . . . . . . . . . . 176
Environmental tip Avoiding pollution . . . . . . . . . . . . . . . . . . . 195
ESC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72, 170 see also Electronic Stability Control . . . . . 145
Exhaust gas purification system . . . . . . . . . . . 174
Exterior mirrors . . . . . . . . . . . . . . . . . . . . . . . . . 184
External aerial . . . . . . . . . . . . . . . . . . . . . . . . . . 191
F
Fabric trim cleaning . . . . . . . . . . . . . . . . . . . . . 188
Fastening rings . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Fire extinguisher . . . . . . . . . . . . . . . . . . . . . . . . 128
First-aid kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128
Floor mats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Fog lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
Fog lights bulb . . . . . . . . . . . . . . . . . . . . . . . . . 243
Fog lights with cornering function . . . . . . . . . 103
Front airbags . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 Description . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Safety notes . . . . . . . . . . . . . . . . . . . . . . . . . 37
Front drink holder . . . . . . . . . . . . . . . . . . . . . . . 124
Front interior light . . . . . . . . . . . . . . . . . . . . . . 107
Front passenger airbag deactivation . . . . . . . . 41
Front reading light . . . . . . . . . . . . . . . . . . . . . . 108 Front seat adjustment
Lumbar support . . . . . . . . . . . . . . . . . . . . . 118
Fuel Diesel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 199
Petrol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 199
Fuel consumption . . . . . . . . . . . . . . . . . . . 176, 256
Fuel level Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Fuel reserve Control lamp . . . . . . . . . . . . . . . . . . . . . . . . . 74
Fuel tank see Fuel reserve . . . . . . . . . . . . . . . . . . . . . . 74
Fuel Tank Opening the fuel tank flap . . . . . . . . . . . . . 194
Fuel: save . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176
Fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 231
G
Gear shift pattern . . . . . . . . . . . . . . . . . . . . . . . 153
General overview of the engine compartment 259
Glove compartment . . . . . . . . . . . . . . . . . . . . . 122
Glove compartment light . . . . . . . . . . . . . . . . . 108
Glow plug system . . . . . . . . . . . . . . . . . . . . . . . 148 control lamp . . . . . . . . . . . . . . . . . . . . . . . . . 70
H
Handbrake . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161 Warning lamp . . . . . . . . . . . . . . . . . . . . . . . 161
Hazard warning lights . . . . . . . . . . . . . . . . . . . 105
HBA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168 Headlight flashers . . . . . . . . . . . . . . . . . . . . . . 106
Headlight range control . . . . . . . . . . . . . . . . . . 102
Headlights
Driving abroad . . . . . . . . . . . . . . . . . . . . . . 178
Fog lights . . . . . . . . . . . . . . . . . . . . . . . . . . 100
Headlight washer . . . . . . . . . . . . . . . . . . . . 112
Head restraints Adjusting . . . . . . . . . . . . . . . . . . . . . . 116, 117
Adjustment of the head restraint angle . . 117
Removing . . . . . . . . . . . . . . . . . . . . . . . . . . 117
Heated exterior mirrors* . . . . . . . . . . . . . . . . . 113
Heated front seats . . . . . . . . . . . . . . . . . . . . . . 119
Heated rear window Heating element wires . . . . . . . . . . . . . . . . 185
Heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
Heating system . . . . . . . . . . . . . . . . . . . . . . . . . 135
High pressure cleaners . . . . . . . . . . . . . . . . . . 183
Hill-start assist . . . . . . . . . . . . . . . . . . . . . . . . . 162
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
How to jump start description . . . . . . . . . . . . . 249
Hydraulic Brake Assist Automatic hazard warning lights activa-tion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168
I
Identification number . . . . . . . . . . . . . . . . . . . 256
Identification plate . . . . . . . . . . . . . . . . . . . . . . 256
Ignition key . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145
Ignition lock . . . . . . . . . . . . . . . . . . . . . . . . . . . 145
Information in the multifunction display Memory displays . . . . . . . . . . . . . . . . . . . . . 61
274 Index