Page 237 of 313

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.
Page 272 of 313

270Vehicle careTowingTowing the vehicle
Wrap a cloth around the tip of a flat
screwdriver to prevent paint damage.
Insert the screwdriver in the slot at the
edge of the cap. Release the cap by
levering it out carefully.
The towing eye is stowed with the
vehicle tools 3 252.
Screw in the towing eye as far as it will
go until it stops in a horizontal
position.
Attach a tow rope – or better still a tow
rod – to the towing eye.
The towing eye must only be used for
towing and not for recovering the
vehicle.
Switch on ignition to release steering wheel lock and to permit operation of
brake lights, horn and windscreen
wiper.
Caution
Deactivate the driver assistance
systems like active emergency
braking 3 193, otherwise the
vehicle may automatically brake during towing.
Switch the selector lever to neutral.
Release the parking brake.
Caution
Drive slowly. Do not drive jerkily.
Excessive tractive force can
damage the vehicle.
When the engine is not running,
considerably more force is needed to
brake and steer.
To prevent the entry of exhaust gases from the towing vehicle, switch on the
air recirculation and close the
windows.
Vehicles with manual transmission
and All-wheel drive: If the vehicle is
towed with all four wheels on the
ground then there are no technical
Page 273 of 313

Vehicle care271limitations for speed and distance. If
only one axle has been raised, the
maximum speed is 30 mph. There is
no distance limitation.
Vehicles with automatic transmission and All-wheel drive: The vehicle must
be towed facing forwards. If the
vehicle is towed with all four wheels
on the ground, the maximum speed is
30 mph and for a maximum of
30 miles. If the front axle has been
raised, the maximum speed is
30 mph. There is no distance
limitation.
Seek the assistance of a workshop. After towing, unscrew the towing eye.
Iinsert cap with the outer flange into
the recess and fix cap by pushing.Towing another vehicle
Wrap a cloth around the tip of a flat
screwdriver to prevent paint damage. Insert the screwdriver in the slot at the
edge of the cap. Release the cap by
levering it out carefully.
The towing eye is stowed with the
vehicle tools 3 252.
Screw in the towing eye as far as it will
go until it stops in a horizontal
position.
The lashing eye at the rear
underneath the vehicle must never be used as a towing eye.
Attach a tow rope – or better still a tow
rod – to the towing eye.
The towing eye must only be used for
towing and not for recovering a
vehicle.
Page 308 of 313

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