Page 131 of 295

Lighting129Exit lighting is switched off
immediately if the turn signal lever is pulled while the driver's door is open.
Activation, deactivation and duration
of this function can be changed in the
Settings menu in the Info-Display.
Vehicle personalisation 3 106.
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
● FanIn 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 146 of 295

144Driving and operatingThe engine will be switched off while
the ignition stays on.
An Autostop is indicated by the
needle at the AUTOSTOP position in
the tachometer.
The stop-start system will be disabled
on inclines of 12% or more.
During an Autostop, the heating and
brake performance will be
maintained.
Caution
The power steering assist may be
reduced during an Autostop.
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 climate control system allows an Autostop.
● The brake vacuum is sufficient.
● 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.
Certain settings of the climate control
system may inhibit an Autostop. See
" Climate control " chapter for more
details 3 133.
Immediately after motorway driving,
an Autostop may be inhibited.
New vehicle running-in 3 141.
Vehicle battery discharge protection
To ensure reliable engine restarts, several battery discharge protection
features are implemented as part of
the stop-start system.
Power saving measures
During an Autostop, several electric
features, e.g. auxiliary electric heater
or heated rear window are disabled or switched into a power saving mode.
The fan speed of the climate control
system is reduced to save power.
Restart of the engine by the driver
Depress the clutch pedal to restart the
engine.
Page 290 of 295

288IndexAAccessories and vehicle modifications .......................... 201
Active Emergency Braking .........174
Active head restraints ...................40
Adaptive cruise control .........93, 163
Adaptive forward lighting ....93,
121, 212
Adjustable air vents ...................138
Airbag and belt tensioners ...........88
Airbag deactivation ................54, 88
Airbag system .............................. 51
Air conditioning regular operation ................................ 139
Air conditioning system .............. 131
Air intake .................................... 138
Air vents...................................... 138
Antilock brake system ................ 153
Antilock brake system (ABS) .......90
Anti-theft alarm system ................29
Anti-theft locking system .............. 29
Appearance care ........................250
Armrest ................................... 47, 48
Armrest storage ........................... 63
Ashtrays ....................................... 80
Automatic anti-dazzle ..................33
Automatic light control ...............118
Automatic locking ........................26
Automatic transmission .............148Autostop..................................... 143
Auxiliary heater ........................... 137
B Battery discharge protection ......129
Battery voltage ........................... 103
Belts.............................................. 48 Bonnet ....................................... 202
Brake and clutch fluid .................255
Brake and clutch system .............89
Brake assist ............................... 155
Brake fluid .................................. 206
Brakes ............................... 153, 206
Breakdown.................................. 248
Bulb replacement ....................... 209
C
Capacities .................................. 269
Car Pass ...................................... 23
Catalytic converter .....................148
Central locking system ................24
Centre console lighting ..............128
Centre console storage ...............64
Changing tyre and wheel size ...235
Charging system .......................... 89
Child locks ................................... 26
Child restraint installation locations ................................... 58
Child restraints.............................. 55
Child restraint systems ................55
Cigarette lighter ........................... 80