
134Driving and operating9Warning
If the vehicle battery is discharged,
the vehicle must not be towed,
tow-started or jump-started as the
steering wheel lock cannot be
disengaged.
Operation on vehicles with
electronic key system in case of
failure
If either the electronic key fails or the
battery of the electronic key is weak,
the Driver Information Centre may
display No Remote Detected or
Replace Battery in Remote Key when
you try to start the vehicle.
Hold the electronic key with buttons outside at the marking on the steering column cover as shown in the
illustration.
Operate the clutch pedal (manual
transmission), the brake pedal and
press Start/Stop . Release the button
after starting procedure begins.
This option is intended for
emergencies only. Replace the
electronic key battery as soon as
possible 3 23.
For unlocking or locking the doors,
see fault in radio remote control unit
or electronic key system 3 24.
Power saving mode
This mode deactivates electrical
consumers to avoid excessive
discharging of the vehicle battery.
These consumers, such as the
Infotainment system, windscreen
wipers, low beam headlights,
courtesy light, etc. can be used for a
total maximum time of about
40 minutes after ignition is switched
off.
Changing into power saving
mode
When power saving mode is
activated, a message appears in the Driver Information Centre indicating
Power saving mode .
An active telephone call using the
hands-free option will be maintained
for around 10 minutes longer.

138Driving and operating● The engine exhaust temperatureis not too high, e.g. after driving
with high engine load.
● The ambient temperature is not too low or too high.
● 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.
Note
The Autostop may be inhibited for
several hours after a battery
replacement or reconnection.
Certain settings of the climate control
system may inhibit an Autostop. See
Climate control chapter for more
details 3 120.
If an autostop is temporarily not
available, D flashes green 3 93.
Immediately after driving at a higher
speed an Autostop may be inhibited.New vehicle running-in 3 132.
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
disabled or switched to a power
saving mode. The fan speed of the
climate control system is reduced to save power.
Restart of the engine by the driver
Vehicles with manual transmissionConventional restart
All engines have conventional restart.
Depress the clutch pedal without
depressing the brake pedal to restart
the engine.
On engines with late restart a
conventional restart is only possible
without depressed brake pedal.Restart of the engine by the stop-
start system
The selector lever must be in neutral to enable an automatic restart.
If one of the following conditions occurs during an Autostop, the
engine will be restarted automatically
by the stop-start system:
● The stop-start system is manually deactivated.
● The driver's seat belt is unfastened or the driver's door is
opened.
● The engine temperature is too low.
● The charging level of the vehicle battery is below a defined level.
● The brake vacuum is not sufficient.
● The climate control system requests an engine start.
● The air conditioning is manually switched on.
If an electrical accessory, e.g. a
portable CD player, is connected to
the power outlet, a brief power drop
during the restart might be noticeable.

192Vehicle careBrakesIn the event of minimum thickness of
the brake lining, a squealing noise
sounds during braking.
Continued driving is possible but
have the brake lining replaced as
soon as possible.
Once new brake linings are installed,
do not brake unnecessarily hard for
the first few journeys.
Brake fluid9 Warning
Brake fluid is poisonous and
corrosive. Avoid contact with eyes, skin, fabrics and painted surfaces.
The brake fluid level must be betweenthe MIN and MAX marks.
If fluid level is below MIN seek the
assistance of a workshop.
Brake and clutch fluid 3 231.
Vehicle battery
The vehicle battery is maintenance-
free provided that the driving profile
allows sufficient charging of the
battery. Short-distance-driving and
frequent engine starts can discharge
the battery. Avoid the use of
unnecessary electrical consumers.
Batteries do not belong in household
waste. They must be disposed of at
an appropriate recycling collection
point.
Laying up the vehicle for more than
four weeks can lead to battery
discharge. Disconnect the clamp from the negative terminal of the vehicle
battery.
Ensure the ignition is switched off
before connecting or disconnecting
the vehicle battery.
Battery discharge protection 3 118.
Disconnecting the battery
If the vehicle's battery is to be
disconnected (e.g. for maintenance
work), the alarm siren must be
deactivated as follows: Switch the
ignition on then off, then disconnect
the vehicle's battery within
15 seconds.

Vehicle care193After having reconnected the battery
of a vehicle equipped with an anti-
theft alarm system, wait 10 minutes
until you start the engine.
Replacing the vehicle battery Note
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.
The vehicle battery has to be
replaced by a workshop.
Stop-start system 3 137.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 3 220.
Warning label
Meaning 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.

Vehicle care205
In right-hand drive vehicles, the fuse
box is located behind a cover in the
glovebox. Open the glovebox and
remove the cover.
No.Circuit1Interior mirror / Exhaust
system / Electric power
steering / Clutch sensor / LPG /
Exterior mirror adjustment /
Inductive charging2–3Trailer Hitch4Horn5Windscreen washer pump
front / rear6Windscreen washer pump
front / rear7Heated steering wheel8Rear wiper9–10Central locking system11Central locking system12Instrument cluster13Climate control system / USBNo.Circuit14OnStar15Instrument cluster / Climate
control system16Brake / Starter / Retained power off17Instrument cluster18Advanced parking assist19Top column module / Trailer
control module20–21Anti-theft alarm system / Start
button22Rain sensor / Camera23Door module24Advanced parking assist /
Camera / Infotainment25Airbag26Top column module27Anti-theft alarm system

Vehicle care213
3. Remove the electrical connectioncable and air hose from the
stowage compartments on the
underside of the compressor.
4. Screw the compressor air hose to
the connection on the sealant
bottle.
5. Fit the sealant bottle into the bracket on the compressor.
Set the compressor near the tyre
in such a way that the sealant
bottle is upright.
6. Unscrew valve cap from defective
tyre.
7. Screw the filler hose to the tyre valve.
8. The switch on the compressor must be set to J.
9. Connect the compressor plug to
the power outlet or cigarette
lighter socket.
To avoid discharging the battery,
we recommend running the
engine.
10. Set the rocker switch on the compressor to I. The tyre is filled
with sealant.
11. The compressor pressure gauge briefly indicates up to 6 bar whilstthe sealant bottle is emptying
(approx. 30 seconds). Then the
pressure starts to drop.

256IndexAAccessories and vehicle modifications .......................... 187
Active emergency braking ....94, 157
Adaptive forward lighting ...........112
AdBlue .................................. 92, 141
Adjustable air vents ...................127
Advanced parking assist ............164
Airbag and belt tensioners ...........89
Airbag deactivation ................56, 89
Airbag label................................... 51 Airbag system .............................. 51
Air conditioning regular operation ................................ 129
Air conditioning system .............. 120
Air intake .................................... 129
Air vents...................................... 127
Antilock brake system ................ 148
Antilock brake system (ABS) .......91
Anti-theft alarm system ................32
Anti-theft locking system .............. 31
Appearance care ........................224
Armrest ................................... 46, 47
Ashtrays ....................................... 79 Automatic anti-dazzle ..................36
Automatic light control ...............111
Automatic locking ........................28
Automatic transmission .............144
Autostop ............................... 93, 137
Auxiliary heater ........................... 127B
Battery discharge protection ......118
Battery voltage ........................... 101 Belts.............................................. 48
BlueInjection ............................... 141
Bonnet ....................................... 189
Brake and clutch fluid .................231
Brake and clutch system .............91
Brake assist ............................... 149
Brake fluid .................................. 192
Brakes ............................... 148, 192
Breakdown.................................. 222
Bulb replacement ....................... 194
C Capacities .................................. 243
Catalytic converter .....................140
Central locking system ................24
Centre console lighting ..............117
Centre console storage ...............64
Changing tyre and wheel size ...211
Charging system .......................... 90
Child locks ................................... 29
Child restraint installation locations ................................... 60
Child restraints.............................. 57
Child restraint systems ................57
Cigarette lighter ........................... 79
Climate control ............................. 16
Climate control systems .............119

258Head restraint adjustment .............8
Head restraints ............................ 42
Head-up display............................ 99 Heated mirrors ............................. 35
Heated rear window ..................... 38
Heated steering wheel .................73
Heated windscreen .......................39
Heating ........................................ 46
Heating and ventilation system . 119
High beam ........................... 94, 111
High beam assist ..........................94
Hill start assist ........................... 149
Horn ....................................... 14, 74
I
Identification plate .....................233
Ignition switch positions .............132
Immobiliser .................................. 34
Indicators ...................................... 84
Inductive charging ........................78
Info Display ................................... 97
Instrument cluster ........................80
Instrument panel fuse box .........204
Instrument panel illumination control .................................... 116
Instrument panel overview ........... 10
Interior care ............................... 226
Interior lighting ............................ 116
Interior lights ...................... 116, 202
Interior mirrors .............................. 36Interruption of power supply ......146
Introduction .................................... 3
J Jump starting ............................. 220
K Keys ............................................. 21
Keys, locks ................................... 21
L
Lane departure warning .......91, 175
Lashing eyes ............................... 68
LED headlights ........................... 197
Lighting features .........................117
Light switch ................................ 110
Load compartment ................30, 64
Load compartment cover .............67
Loading information .....................70
Low beam ..................................... 94
Low fuel ....................................... 93
LPG ...................................... 85, 179
M
Malfunction indicator light ............90
Manual anti-dazzle ......................36
Manual mode ............................. 145
Manual transmission .................. 147
Mirror adjustment ........................... 9
Misted light covers .....................115N
New vehicle running-in ..............132
Number plate light .....................202
O
Object detection systems ...........161
Odometer ..................................... 84
Oil, engine .......................... 231, 235
OnStar ........................................ 105
Outside temperature ....................76
Overrun cut-off ........................... 136
P Panoramic view system ..............171
Parking ................................ 19, 139
Parking assist ............................ 161
Parking brake ....................... 91, 148
Parking lights ............................. 115
Particulate filter ........................... 140
Performance .............................. 239
Performing work ........................189
Power button .............................. 133
Power outlets ............................... 77
Power saving mode ....................134
Power windows ............................ 37
Preheating ................................... 92
Puncture ..................................... 216
Q
Quickheat ................................... 127