Page 148 of 317

146LightingThey will switch off automatically after
a delay. This function works only in
the dark. Theatre lighting is activated
if the driver's door is opened during
this time.
Path lighting Headlights, tail lights and number
plate lights illuminate the surrounding
area for an adjustable time after
leaving the vehicle.
Activating
1. Switch off the ignition.
2. Remove the ignition key.
3. Open the driver's door.
4. Pull the turn signal lever.
5. Close the driver's door.
If the driver's door is not closed, the
lights switch off after two minutes.
Exit lighting is switched off
immediately if the turn signal lever is pulled while the driver's door is open.
This function can be activated or
deactivated in the vehicle
personalisation.
Select the relevant setting in Settings,
I Vehicle in the Info-Display.
Info-Display 3 121.
Vehicle personalisation 3 125.
The settings can be saved for the key being used 3 24.
Battery discharge protection 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 window and 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.
Switching off electric lights
To prevent discharge of the vehicle
battery when the ignition is switched off, some interior lights are switched
off automatically after some time.
Page 166 of 317

164Driving and operatingVehicles with automatic transmission
or manual transmission automated
If the vehicle is at a standstill with
depressed brake pedal, Autostop is
activated automatically.
Indication
An Autostop is indicated by the
needle at the AUTOSTOP position in
the tachometer.
After restart, the idle speed is
indicated.
During an Autostop the performance
of the vehicle will be maintained.
Conditions for an Autostop
The stop-start system checks if each
of the following conditions is fulfilled:
● The stop-start system is not manually deactivated.
● The bonnet is fully closed.
● The driver's door is closed or the driver's seat belt is fastened.
● The vehicle battery is sufficiently charged and in good condition.
● The engine is warmed up.
● The engine coolant temperature is not too high.
● The engine exhaust temperature is not too high, e.g. after driving
with high engine load.
● The ambient temperature is above -5 °C.
● The brake vacuum is sufficient.
● Between the last Restart and a new Autostop must be about
10 s.● The self-cleaning function of the diesel particle filter is not active.
● The vehicle was driven at least at
walking speed since the last
Autostop.
Otherwise an Autostop will be
inhibited.
The stop-start system will be
deactivated on inclines of 12% or
more.
Certain settings of the climate control
system may inhibit an Autostop. See
Climate control chapter for more
details 3 148.
Immediately after motorway driving
an Autostop may be inhibited.
New vehicle running-in 3 158.
Vehicle battery discharge protection
To ensure reliable engine restarts,
several vehicle battery discharge
protection features are implemented
as part of the stop-start system.
Power saving measures
During an Autostop, several electrical
features such as auxiliary electric
heater or rear window heating are
Page 312 of 317

310IndexAAccessories and vehicle modifications .......................... 231
Active emergency braking ..........200
Adaptive cruise control .......115, 189
AdBlue ................................ 113, 169
Adjustable air vents ...................155
Airbag and belt tensioners .........110
Airbag deactivation ..............63, 110
Airbag label................................... 58
Airbag system .............................. 58
Air conditioning regular operation ................................ 156
Air conditioning system .............. 148
Air intake .................................... 156
Air vents...................................... 155
Antilock brake system ................ 179
Antilock brake system (ABS) .....112
Anti-theft alarm system ................36
Anti-theft locking system .............. 36
Appearance care ........................277
Armrest ................................... 53, 55
Armrest storage ........................... 72
Ashtrays ..................................... 100
Automatic anti-dazzle ..................41
Automatic light control ...............137
Automatic locking ........................29
Automatic transmission .............172
Autostop ..................................... 163
Auxiliary heater ........................... 155B
Battery discharge protection ......146
Battery voltage ........................... 125 Belts.............................................. 56
BlueInjection ............................... 169
Bonnet ....................................... 233
Brake and clutch fluid .................281
Brake and clutch system ...........111
Brake assist ............................... 182
Brake fluid .................................. 236
Brakes ............................... 179, 236
Breakdown.................................. 275
Bulb replacement ....................... 239
C Capacities .................................. 296
Cargo management system ........82
Catalytic converter .....................169
Central locking system ................24
Centre console lighting ..............145
Changing tyre and wheel size ...264
Charging system ........................ 111 Child locks ................................... 30
Child restraint installation locations ................................... 67
Child restraints.............................. 65
Child restraint systems ................65
Climate control ............................. 16
Climate control systems .............147
Clock............................................. 95