Page 209 of 283
Driving and operating207Checking the tensioning of the
coupling ball bar
● Red marking on rotary knob must
point towards green marking on
coupling ball bar.
● The gap between the rotary knob
and the coupling ball bar must be approx. 6 mm.
● Remove the cover from the lock of the rotary knob and verify
whether the rotary knob is
locked. If the rotary knob cannot be turned, it is locked.
Otherwise, the coupling ball bar must be tensioned before being inserted:
● Unlock coupling ball bar by turning key to position c.● Pull out rotary knob and turn
clockwise as far as it will go.
Inserting the coupling ball bar
Page 210 of 283

208Driving and operatingInsert the tensioned coupling ball bar
in the opening and push firmly
upwards until it audibly engages.
The rotary handle snaps back into its
original position resting against the
coupling ball bar without a gap.9 Warning
Do not touch rotary handle during
insertion.
Lock the coupling ball bar by turning
the key to position e. Remove the key
and close the protective flap.
Eye for break-away stopping cable
Attach breakaway stopping cable to
eye.
Check that the coupling ball bar is correctly installed
● Green marking on rotary knob must point towards green
marking on coupling ball bar.
● There must be no gap between the rotary handle and the
coupling ball bar.
● The coupling ball bar must be firmly engaged in the opening.
● The coupling ball bar must be locked and the key removed.9Warning
Towing a trailer is permitted only
when a coupling ball bar is fitted correctly. If the coupling ball bardoes not engage correctly, seekthe assistance of a workshop.
Dismounting the coupling ball bar
Open the protective flap and turn the
key to position c to unlock the
coupling ball bar.
Pull out rotary handle and turn
clockwise as far as it will go. Pull out coupling ball bar downwards.
Insert sealing plug in opening. Fold away socket.
Trailer stability assist
If the system detects snaking
movements, engine power is reduced
and the vehicle / trailer combination is
Page 224 of 283
222Vehicle care
2.Slacken the light fixing nut using a
box spanner or socket.
To avoid losing the nut if it drops
into the wing trim, first place a
cloth below it.
3. Manually unscrew and remove the light fixing nut.
4. Disengage the retaining clip, while pushing the light out slightly.5. From the outside, carefullywithdraw the light assembly from
recess and remove. Take care
that the cable duct remains in
position.
6. Turn the bulb socket anticlockwise and remove it from
the light assembly.7. Detach the bulb from the bulb socket and replace the bulb.
Brake light( 1)
Page 225 of 283
Vehicle care223
Turn light (2)
8. Insert the bulb socket into the light
assembly. Fit the light assembly in the recess and tighten the light
fixing nut from the inside. Attach
the cover.
Light assembly in the tailgate
1. Open the tailgate and remove the
cover.
2. Slacken the light fixing nut using a
box spanner or socket.
3. Manually unscrew and remove the light fixing nut.
4. Disengage the retaining clip, while pushing the light assembly
out slightly.
5. From the outside, carefully withdraw light assembly from
recess and remove. Take care
that the cable duct remains in
position.
6. Turn the bulb socket anticlockwise and remove it from
the light assembly.
Page 227 of 283

Vehicle care225
2. Turn bulb socket clockwise andremove from light assembly.
3. Detach the bulb from the bulbsocket and replace the bulb.
4. Insert bulb socket and turnanticlockwise.
5. Insert left end of the light assembly, slide to the left and
insert right end.
Number plate light
Number plate lights are designed as LEDs and can not be changed.
Have lights repaired by a workshop in
case of failure.
Interior lights
Have the following bulbs replaced by
a workshop:
● courtesy light, reading lights
● load compartment light
● instrument panel illuminationElectrical system
Fuses Data on the replacement fuse mustmatch the data on the defective fuse.
There are two fuse boxes in the
vehicle:
● engine compartment
● instrument panel
Before replacing a fuse, turn off the
respective switch and the ignition.
A blown fuse can be recognised by its melted wire.Caution
Do not replace the fuse until the
cause of the fault has been
remedied.
Some functions are protected by
several fuses.
Fuses may also be inserted without
existence of a function.
Page 279 of 283

277Charging status.......................... 198
Charging system .......................... 94
Child locks ................................... 28
Child restraint installation locations ................................... 64
Child restraints.............................. 61
Child restraint systems ................61
Cigarette lighter ........................... 87
Climate control ............................. 15
Climate control systems .............122
Clock............................................. 83
Collision damage repair ..............270
Control indicators.......................... 92
Control of the vehicle .................134
Controls ........................................ 79
Convex shape .............................. 36
Coolant and antifreeze ...............254
Cruise control ...................... 99, 159
Cupholders .................................. 68
Curtain airbag system .................. 59
Curve lighting.............................. 114
D Danger, Warnings and Cautions ...4
Daytime running lights ...............114
Declaration of conformity ............268
DEF ............................................ 142
Deflation detection system ...........98
Diesel exhaust fluid ....................142
Diesel fuel system bleeding .......218Door open .................................. 100
Doors ............................................ 29
Drive modes ............................... 151
Driver alert .................................. 193
Driver assistance systems ..........159
Driver Information Centre ...........100
Driving characteristics and towing tips .............................. 205
Driving hints ................................ 134
E Electric adjustment ......................36
Electrical system......................... 225
Electric parking brake ...95, 152, 153
Electric parking brake fault ...........95
Electronic climate control system 126
Electronic driving programmes ..149
Electronic key system ...................22
Electronic Stability Control and Traction Control system ....96, 156
Electronic Stability Control and Traction Control system off .......97
Emergency call ........................... 110
End-of-life vehicle recovery .......212
Engine compartment fuse box ...226
Engine coolant ........................... 215
Engine coolant temperature ........97
Engine coolant temperature gauge ....................................... 91
Engine data ............................... 260Engine exhaust .......................... 141
Engine identification ...................257
Engine oil ................... 214, 254, 258
Engine oil level monitor ................91
Engine oil pressure ......................98
Entry lighting .............................. 121
Event data recorders ..................271
Exhaust filter ......................... 97, 141
Exit lighting ................................ 121
Exterior care .............................. 246
Exterior light ................................. 98
Exterior lighting ....................12, 112
Exterior mirrors ............................. 36
F
Fault ........................................... 149
First aid ......................................... 75
First aid kit ................................... 75
Fixed air vents ........................... 132
Floor mats................................... 248
Folding mirrors ............................. 37
Forward collision alert................. 170
Front airbag system .....................58
Front fog lights .............99, 118, 221
Front pedestrian protection ........175
Front seats.................................... 45
Fuel............................................. 201
Fuel for diesel engines ..............202
Fuel for petrol engines ...............201