Page 147 of 319

Lighting145They 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 3 120.
Vehicle personalisation 3 124.
The settings can be saved for the key being used 3 23.
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 165 of 319

Driving and operating163Early Autostop is inhibited when the
turn signal is on, trailer hitch is
connected, the steering wheel is
moved beyond a certain point or the
inclines is greater than 5%.Vehicles 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 exhaust 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 3 147.
Immediately after motorway driving
an Autostop may be inhibited.
New vehicle running-in 3 157.
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 314 of 319

312IndexAAccessories and vehicle modifications .......................... 230
Active emergency braking ..........199
Adaptive cruise control .......114, 188
AdBlue ................................ 112, 168
Adjustable air vents ...................154
Airbag and belt tensioners .........109
Airbag deactivation ..............62, 109
Airbag label................................... 57
Airbag system .............................. 57
Air conditioning regular operation ................................ 155
Air conditioning system .............. 147
Air intake .................................... 155
Air vents...................................... 154
Antilock brake system ................ 178
Antilock brake system (ABS) .....111
Anti-theft alarm system ................35
Anti-theft locking system .............. 35
Appearance care ........................276
Armrest ................................... 52, 54
Armrest storage ........................... 71
Ashtrays ....................................... 99 Automatic anti-dazzle ..................40
Automatic light control ...............136
Automatic locking ........................28
Automatic transmission .............171
Autostop ..................................... 162
Auxiliary heater ........................... 154B
Battery discharge protection ......145
Battery voltage ........................... 124 Belts.............................................. 55
BlueInjection ............................... 168
Bonnet ....................................... 232
Brake and clutch fluid .................280
Brake and clutch system ...........110
Brake assist ............................... 181
Brake fluid .................................. 235
Brakes ............................... 178, 235
Breakdown.................................. 274
Bulb replacement ....................... 238
C Capacities .................................. 296
Cargo management system ........81
Catalytic converter .....................168
Central locking system ................23
Centre console lighting ..............144
Changing tyre and wheel size ...263
Charging system ........................ 110 Child locks ................................... 29
Child restraint installation locations ................................... 66
Child restraints.............................. 64
Child restraint systems ................64
Climate control ............................. 15
Climate control systems .............146
Clock............................................. 94