Vehicle care235Replacing the vehicle batteryNotice
Any deviation from the instructions
given in this section may lead to
temporary deactivation or
disturbance of the stop-start system.
When the vehicle battery is being
replaced, please ensure that there
are no open ventilation holes in the
vicinity of the positive terminal. If a
ventilation hole is open in this area, it
must be closed off with a dummy cap, and the ventilation in the vicinity of the
negative terminal must be opened.
Ensure that the battery is always replaced by the same type of battery.
We recommend that you have the
vehicle battery replaced by a
workshop.
Stop-start system 3 156.Charging the vehicle battery9 Warning
On vehicles with stop-start
system, ensure that the charging potential does not exceed 14.6 V
when using a battery charger.
Otherwise the vehicle battery may be damaged.
Jump starting 3 268.
Discharge protection Battery voltage
When the vehicle battery voltage is
running low, a warning message will
appear in the Driver Information
Centre.
1. Switch off any electrical consumers which are not requiredfor a safe ride, e.g. seat heating,
heated rear window or other main consumers.
2. Charge the vehicle battery by driving continuously for a while or
by using a charging device.
The warning message will disappear
after the engine has been started
twice without a voltage drop.
If the vehicle battery cannot be
recharged, have the cause of the fault
remedied by a workshop.
Vehicle battery state of charge
function
The function guarantees longest vehicle battery life via a generator
with controllable power output and
optimised power distribution.
To prevent discharge of the vehicle
battery when driving, the following
systems are reduced automatically in two stages and finally switched off:
● auxiliary heater
● heated rear and front window
● heated steering wheel
● heated mirrors
● heated seats
● fan
In the second stage, a message
which confirms the activation of the
vehicle battery discharge protection
will be displayed in the Driver
Information Centre.
236Vehicle careIdle boost
If charging of the vehicle battery is
required due to battery condition, the
power output of the generator must be increased. This will be achieved by an idle boost which may be audible.
A message appears in the Driver
Information Centre.
Power outlet
The power outlets are deactivated in
the event of low vehicle battery
voltage.
Warning labelMeaning of symbols: ● No sparks, naked flames or smoking.
● Always shield eyes. Explosive gases can cause blindness or
injury.
● Keep the vehicle battery out of reach of children.
● The vehicle battery contains sulphuric acid which could cause
blindness or serious burn
injuries.
● See the Owner's Manual for further information.
● Explosive gas may be present in the vicinity of the vehicle battery.
Diesel fuel system bleeding If the tank has been run dry, the diesel
fuel system must be bled. Switch on
the ignition three times for
15 seconds at a time. Then crank the
engine for a maximum of 40 seconds. Repeat this process after
no less than 5 seconds. If the engine fails to start, seek the assistance of a
workshop.Wiper blade replacement
Windscreen
Lift the wiper arm until it stays in the
raised position. Lift retaining clip to
disengage the wiper blade and
remove.
Attach the wiper blade slightly angled
to the wiper arm and push until it
engages.
Lower wiper arm carefully.
Vehicle care261
2.Type 1: screw the compressor air
hose to the connection on the
sealant bottle and fit the sealant
bottle into the retainer on the
compressor.
Type 2: remove screw plug from
the compressor and from the
sealant bottle. Screw the bottle on the compressor without removing
the tinfoil from the bottle.
3. Set the compressor near the tyre in such a way that the sealant
bottle is upright.
4. Unscrew valve cap from defective
tyre.
5. Type 1: screw the filler hose to the
tyre valve.
Type 2: remove protection cap
from filler hose and screw the filler
hose to the tyre valve. The air
release valve must be closed (turn clockwise).
6. The switch on the compressor must be set to J.
7. Connect the compressor plug to the power outlet or cigarette
lighter socket.
To avoid discharging the battery, we recommend running the
engine.
306IndexAAccessories and vehicle modifications .......................... 228
Active bonnet ................................ 71
Active emergency braking ..........193
Adaptive cruise control .......109, 180
AdBlue ................................ 108, 161
Adjustable air vents ...................148
Airbag and belt tensioners .........105
Airbag deactivation ..............63, 105
Airbag label................................... 58
Airbag system .............................. 58
Air conditioning regular operation ................................ 149
Air conditioning system .............. 139
Air intake .................................... 149
Air vents...................................... 148
All-wheel drive ........................... 169
Antilock brake system ................ 169
Antilock brake system (ABS) .....106
Anti-theft alarm system ................34
Anti-theft locking system .............. 34
Appearance care ........................272
Armrest ................................... 53, 55
Armrest storage ........................... 74
Ashtrays ....................................... 95 Automatic anti-dazzle ..................40
Automatic dimming ......................39
Automatic light control ...............129
Automatic locking ........................28Automatic transmission .............164
Autostop ..................................... 156
Auxiliary heater ........................... 148
B Baselevel display ........................110
Battery discharge protection ......138
Belts.............................................. 56 BlueInjection ............................... 161
Bonnet ....................................... 230
Brake and clutch fluid .................277
Brake and clutch system ...........106
Brake assist ............................... 172
Brake fluid .................................. 233
Brakes ............................... 169, 233
Breakdown.................................. 270
Bulb replacement ....................... 237
C Capacities .................................. 290
Cargo management system ........80
Catalytic converter .....................161
Central locking system ................25
Centre console lighting ..............137
Centre console storage ...............74
Changing tyre and wheel size ...258
Charging system ........................ 105
Child locks ................................... 29
Child restraint installation locations ................................... 67
Child restraints.............................. 64
308HHalogen headlights ....................237
Hand brake ................................. 169
Hazard warning flashers ............133
Headlight flash ........................... 131
Headlight range adjustment ......131
Headlights................................... 128
Headlights when driving abroad 131
Head restraint adjustment .............8
Head restraints ............................ 45
Head-up display.......................... 117 Heated mirrors ............................. 39
Heated rear window ..................... 42
Heated steering wheel .................88
Heated windscreen .......................43
Heating .................................. 54, 55
High beam ......................... 109, 129
High beam assist ................109, 129
Hill start assist ........................... 172
Horn ....................................... 13, 89
I
Identification plate .....................279
Ignition switch positions .............151
Immobiliser .......................... 37, 109
Indicators .................................... 100
Inductive charging ........................94
Info Display ................................. 116
Instrument cluster ........................96
Instrument panel fuse box .........251Instrument panel illumination
control .................................... 135
Instrument panel overview ........... 10
Interactive driving system ...........175
Interior care ............................... 274
Interior lighting ............................ 135
Interior lights ...................... 136, 247
Interior mirrors .............................. 39
Interruption of power supply ......167
Introduction .................................... 3
J
Jump starting ............................. 268
K
Key, memorised settings ..............25
Keys ............................................. 20
Keys, locks ................................... 20
L
Lane change alert .......................206
Lane keep assist ................107, 217
Lashing eyes ............................... 80
LED headlights ...........109, 132, 239
Lighting features .........................137
Light switch ................................ 128
Load compartment ................29, 75
Load compartment cover .............78
Loading information .....................85
Low fuel ..................................... 108M
Malfunction indicator light ..........105
Manual anti-dazzle ......................39
Manual mode ............................. 165
Manual seat adjustment ...............48
Manual transmission .................. 168
Massage ....................................... 55
Memorised settings ......................25
Mirror adjustment ........................... 8
Misted light covers .....................135
N New vehicle running-in ..............151
Number plate light .....................247
O
Object detection systems ...........198
Odometer ................................... 101 Oil, engine .......................... 277, 281
Outside temperature ....................92
Overrun cut-off ........................... 156
P Panoramic view system ..............208
Parking ................................ 18, 158
Parking assist ...................... 39, 198
Parking brake ............................ 170
Parking lights ............................. 135
Particulate filter ........................... 159
Pedestrian detection ...................110
Performance .............................. 286