
225
If and when
Fuses on left side of dash panel
Fuses
NumberConsumerAmps1Power steering/Engine operation/Flow meter7,5
2
Diagnostics/Heater/Autoclimate/Climatronic/
Electric anti-dazzle mirror/Navigator/Air condi-
tioning pressure switch/ Climate fan/AFS Control
unit/Coming home relay/Soundaktor/CCS
10
3Petrol engine control unit/Diesel engine control
unit/Relay coils/Engine operation/Bi-turbo fuel
control unit5
4ABS-ESC Control unit/RKA Switch/Gateway con-
trol unit/ESC Relay/Rotation sensor10
5Reverse light/Heating nozzles106Instrument panel57Retro fog light/Start-Stop relays7,5
8Paddle levers on steering wheel for automatic
gearbox2
9Headlight lever/Windscreen wiper switch1010BCM Electronic control unit power supply511Airbag control unit512Automatic gearbox/ LPG system1013Exterior mirror control514Left-hand AFS headlights1515Right-hand AFS headlights1516Vacant 17Number plate light518Clean pump7,519Electronic control unit520Turn signals/Brake lights15
NumberConsumerAmps21Lights control, instrument panel522Heated mirrors5
23Engine injection module/Rain sensor/Automatic
gearbox lever/Main petrol relay7,5
24Luggage compartment light, interior light, glove
compartment light, side lights10
25Parking aid526Towing hook 27Headlight control528Lambda probe10
29Vacuum pump/LPG power supply/High-pressure
pump15, 20, 20 a)
30Engine solenoid coils/Additional heating relay/
Pressure sensor/AKF Valve10A
31Petrol engine operation/Glow plugs/Relay coil/
Electric fan/Secondary water pump relay/Flow-
meter10
32Engine control unit15, 20,
30 b)
33Clutch switch sensor/Additional heating relay
coil/ Servo sensor5
34Fuel control unit / Vacuum pump1535Vacant 36Main beam with/without AFS10, 15 c)
37Kombi/Coming Home relay/Main beam head-
lights relay10
38Engine heater3039Vacant 4012 Volt Input/Cigarette lighter1541Heated seats control unit / Cup Holder25
Safety FirstOperating InstructionsPractical TipsTechnical Specifications

226If 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

228If and when
Xenon 1)
//adaptive headlights*
- D1S2)
- LED 3)
- LED3)
- PY 21W
Fog light - H11
WARNING
● Take particular care when working on components in the engine com-
partment if the engine is warm. Risk of burns.
● Bulbs are highly sensitive to pressure. The glass can break when you
touch the bulb, causing injury.
● The high voltage element of gas discharge bulbs* (xenon light) must
be handled correctly. Otherwise, there is a risk of death.
● When changing bulbs, please take care not to injure yourself on sharp
parts in the headlight housing.
CAUTION
● Remove the ignition key before working on the electric system. Other-
wise, a short circuit could occur.
● Switch off the lights or parking lights before you change a bulb.
Dipped and full beam
Side
DRL (day light)
Turn signals
Fog light/cornering
For the sake of the environment
Please ask your specialist retailer how to dispose of used bulbs in the prop-
er manner.
Note
● Depending on weather conditions (cold or wet), the front lights, the fog
lights, the tail lights and the turn signals may be temporarily misted. This
has no influence on the useful life of the lighting system. By switching on
the lights, the area through which the beam of light is projected will quickly
be demisted. However, the edges may continue to be misted.
● Please check at regular intervals that all lighting (especially the exterior
lighting) on your vehicle is functioning properly. This is not only in the inter-
est of your own safety, but also that of all other road users.
● Before changing a bulb, make sure you have the correct new bulb.
● Do not touch the glass part of the bulb with your bare hands, use a cloth
or paper towel instead. Otherwise, the fingerprints left on the glass will va-
porise as a result of the heat generated by the bulb, they will be deposited
on the reflector and will impair its surface.
1)
With this type of headlight, the user can replace the turn signal bulb. Replacement of the
dipped/main beam bulb must be done by a Technical Service, given that complex elements
must be removed from the vehicle and the automatic control system that incorporates it
must be reset.
2) The Xenon bulbs discharge 2.5 times the light flux and have an average lifespan of 5 times
more than that of halogen bulbs, this means that, except due to unusual circumstances,
there is no need to change the bulbs for the whole life of the vehicle.
3) In the event that there is a fault in the LEDs, the complete headlight must be replaced.

236If and when
Changing the fog light bulbs
Fog light bulb
Fig. 157 Fog light
Fig. 158 Fog light –
Remove the bolt ⇒ Fig. 157 A
from the fog light grille with a
screwdriver.
– Subsequently, remove the clips located on the edge of the grill
with gentle leverage.
– Remove the bolts (3x) ⇒ Fig. 158 B
to remove the fog light.
– Remove the metal clip situated on the upper part of the fog
light pulling towards the exterior of the vehicle ⇒ Fig. 158 C
.
Remove the bulb holder
Fig. 159 Fog light
– Remove connector ⇒ Fig. 159 A
from the bulb.
– Turn bulb holder ⇒ Fig. 159 B
to the left and pull.
– Remove the bulb by pressing on the bulb holder and turning it
anticlockwise at the same time.

237
If and when
– Installation involves the above steps in reverse sequence.
– Check that the bulb works properly.
Changing the rear, side and interior light
bulbs Summary of LED tail lights
LEDS
● Brake lights
● Side lights
Bulbs
● Rear fog light
● Reversing light
● Turn signal Tail lights
Fig. 160 Left tail light
Fig. 161 Right tail light
Turn signals
Side and brake
Side
A
BC
Safety FirstOperating InstructionsPractical TipsTechnical Specifications

238If and when
Retro-fog light (left tail light)
Reverse light (right tail light)
Note
In countries driving on the right (left-driving), both D and E headlights are
placed the other way round (Retro-fog light on driver side and reverse light
on passenger side).
Access to tail lights
Fig. 162 Access to tail
lights
– Open the rear lid.
– Turn the bolt in the direction of the arrow, by hand or with a
screwdriver ⇒
Fig. 162.
– Remove the tail light, by pulling it outwards.
D
EChanging bulbs on tail lights
Fig. 163 Changing bulbs
on tail lights
Fig. 164 Changing bulbs
on tail lights
– Remove the connector from housing A
⇒ Fig. 162.
– Remove the bulb holder, separating it from the casing. To do
this, press tabs B
in the direction of the arrows
⇒ Fig. 163.

C
Car care Exterior . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175
Car phone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184
Catalytic converter . . . . . . . . . . . . . . . . . . . . . . 168
CCS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158
Central lock button Locking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Unlocking . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Central locking . . . . . . . . . . . . . . . . . . . . . . . . . . 80 Automatic speed dependent locking andunlocking system* . . . . . . . . . . . . . . . . . . 82
Locking system for involuntary unlocking . 82
Selective unlocking system* . . . . . . . . . . . . 81
Unlocking system* . . . . . . . . . . . . . . . . . . . . 82
Cetane number . . . . . . . . . . . . . . . . . . . . . . . . . 192
Changing bulbs interior light and reading light . . . . . . . . . 240
Changing bulbs on tail lights . . . . . . . . . . . . . 238
Changing gear see Manual gearbox . . . . . . . . . . . . . . . . . . 146
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 . . . . . . . . . . . . 241
number plate light . . . . . . . . . . . . . . . . . . . 239
Side turn signal lights . . . . . . . . . . . . . . . . 239 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 . . . . . . . . 203
Chassis number . . . . . . . . . . . . . . . . . . . . . . . . 248
Checking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 208
Checking battery electrolyte level . . . . . . . . . . 208
Checking engine oil level . . . . . . . . . . . . . . . . . 198
Child safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Child seat Categorisation in groups . . . . . . . . . . . . . . . 44
Group 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Group 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Group 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Groups 0 and 0+ . . . . . . . . . . . . . . . . . . . . . . 44
Safety notes . . . . . . . . . . . . . . . . . . . . . . . . . 42
Securing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Child seats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 ISOFIX system . . . . . . . . . . . . . . . . . . . . . . . . 48
on the front passenger seat . . . . . . . . . . . . . 30
Top Tether system . . . . . . . . . . . . . . . . . . . . 49
Cigarette lighter . . . . . . . . . . . . . . . . . . . . . . . . 123
Cleaning alloy wheel rims . . . . . . . . . . . . . . . . 179
Cleaning chrome . . . . . . . . . . . . . . . . . . . . . . . 178
Cleaning engine compartment . . . . . . . . . . . . 180
Cleaning steel wheel rims . . . . . . . . . . . . . . . . 179
Cleaning windows . . . . . . . . . . . . . . . . . . . . . . 177 Climatronic
automatic mode . . . . . . . . . . . . . . . . . . . . . 134
controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133
General notes . . . . . . . . . . . . . . . . . . . . . . . 135
manual mode . . . . . . . . . . . . . . . . . . . . . . . 134
Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Cloth seat covers cleaning . . . . . . . . . . . . . . . . 181
Cockpit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Coming Home function . . . . . . . . . . . . . . . . . . 101
Compartment for on-board documentation . . 119
Control Exterior mirrors . . . . . . . . . . . . . . . . . . . . . . 110
control lamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Control lamps . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Control lighting . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Controls Electric windows . . . . . . . . . . . . . . . . . . . . . . 92
Convenience closing Sliding/tilting sunroof . . . . . . . . . . . . . . . . . 95
Windows . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
Convenience opening Windows . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
Coolant . . . . . . . . . . . . . . . . . . . . . . . . . . . 200, 201
Coolant level . . . . . . . . . . . . . . . . . . . . . . . . . . . 201 control lamp . . . . . . . . . . . . . . . . . . . . . . . . . 74
Coolant loss . . . . . . . . . . . . . . . . . . . . . . . . . . . 201
Coolant temperature Safety instructions . . . . . . . . . . . . . . . . . . . . 74
Correct adjustment of front head restraints . . . 13
270 Index

Engine oil pressurecontrol lamp . . . . . . . . . . . . . . . . . . . . . . . . . 69
Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . 169 Environmental friendliness . . . . . . . . . . . . 171
Environmentally friendly driving . . . . . . . . . . . 169
Environmental tip Avoiding pollution . . . . . . . . . . . . . . . . . . . 188
ESC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71, 164 see also Electronic Stability Control . . . . . 138
Exhaust gas purification system . . . . . . . . . . . 168
Exterior mirrors . . . . . . . . . . . . . . . . . . . . . . . . . 177
External aerial . . . . . . . . . . . . . . . . . . . . . . . . . . 184
F
Fabric trim cleaning . . . . . . . . . . . . . . . . . . . . . 181
Floor mats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Fog lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
Fog lights bulb . . . . . . . . . . . . . . . . . . . . . . . . . 236
Fog lights with cornering function . . . . . . . . . 100
Front airbags . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Description . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Safety notes . . . . . . . . . . . . . . . . . . . . . . . . . 36
Front ashtray . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
Front drink holder* . . . . . . . . . . . . . . . . . . . . . . 121
Front interior light . . . . . . . . . . . . . . . . . . . . . . 104
Front passenger airbag deactivation . . . . . . . . 40
Front reading light . . . . . . . . . . . . . . . . . . . . . . 105
Front seat adjustment Lumbar support . . . . . . . . . . . . . . . . . . . . . 115 Fuel
Diesel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 192
Petrol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 192
Fuel consumption . . . . . . . . . . . . . . . . . . . 169, 248
Fuel level Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Fuel reserve . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Fuel tank see Fuel reserve . . . . . . . . . . . . . . . . . . . . . . 73
Fuel Tank Opening the fuel tank flap . . . . . . . . . . . . . 187
Fuel: save . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169
Fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 224
G
Gear shift pattern . . . . . . . . . . . . . . . . . . . . . . . 146
General overview of the engine compartment 251
Glove compartment . . . . . . . . . . . . . . . . . . . . . 119
Glove compartment light . . . . . . . . . . . . . . . . . 105
Glow plug system . . . . . . . . . . . . . . . . . . . . . . . 141 control lamp . . . . . . . . . . . . . . . . . . . . . . . . . 68
H
Handbrake . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154 Warning lamp . . . . . . . . . . . . . . . . . . . . . . . 154
Hazard warning lights . . . . . . . . . . . . . . . . . . . 102
HBA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162
Headlight flashers . . . . . . . . . . . . . . . . . . . . . . 103
Headlight range control . . . . . . . . . . . . . . . . . . . 99 Headlights
Driving abroad . . . . . . . . . . . . . . . . . . . . . . 172
Fog lights . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
Headlight washer . . . . . . . . . . . . . . . . . . . . 109
Head restraints Adjusting . . . . . . . . . . . . . . . . . . . . . . 113, 114
Adjustment of the head restraint angle . . 114
Removing . . . . . . . . . . . . . . . . . . . . . . . . . . 114
Heated exterior mirrors* . . . . . . . . . . . . . . . . . 110
Heated front seats . . . . . . . . . . . . . . . . . . . . . . 116
Heated rear window Heating element wires . . . . . . . . . . . . . . . . 178
Heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127
Heating system . . . . . . . . . . . . . . . . . . . . . . . . . 128
High pressure cleaners . . . . . . . . . . . . . . . . . . 176
Hill-start assist . . . . . . . . . . . . . . . . . . . . . . . . . 155
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
How to jump start description . . . . . . . . . . . . . 242
Hydraulic Brake Assist Automatic hazard warning lights activa-tion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162
I
Identification number . . . . . . . . . . . . . . . . . . . 248
Identification plate . . . . . . . . . . . . . . . . . . . . . . 248
Ignition key . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138
Ignition lock . . . . . . . . . . . . . . . . . . . . . . . . . . . 138
Information in the multifunction display Memory displays . . . . . . . . . . . . . . . . . . . . . 59
Instrument and switch lighting . . . . . . . . . . . . . 99
Instrument lighting . . . . . . . . . . . . . . . . . . . . . . 53
272 Index