
162Driving and operatingDuring an Autostop, the heating and
brake performance 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 climate control system allows an Autostop.
● The brake vacuum is sufficient.● Between the last restart and a new Autostop must be about10 seconds.
● 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 3 144.
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 battery discharge protection
features are implemented as part of
the stop-start system.Power saving measures
During an Autostop, several electrical
features e.g. auxiliary electric heater
or heated rear window 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 transmission
All engines can be restarted in two
ways: with a conventional restart or a
late restart.Conventional restart
Depress the clutch pedal without
depressing the brake pedal to restart
the engine.Late restart
Late restart is only available on
inclines up to 5%.
● Depress the brake pedal.
● Depress the clutch pedal.
● Select first gear.
● Release the brake pedal to restart the engine.

Driving and operating171The selected gear is indicated in theinstrument cluster.
Temporary manual mode in drive
mode D
Manual paddle shifting is also
possible in automatic mode D. Upon
completion of manual shifting
operation, transmission changes to
automatic mode D after a defined
time.
To interrupt manual mode and return
to D, do one of the following:
● Press + paddle for 1 second.
● Move selector lever towards the left to manual mode and back toposition D.
If the vehicle is at a standstill and
engine is idling, the transmission will remain in temporary manual mode. It
changes to automatic mode when
accelerator pedal is operated for a
defined time, and no paddle shifting
at the steering wheel is performed.
General
If a higher gear is selected when
vehicle speed is too low, or a lower
gear when vehicle speed is too high,the shift is not executed. This can
cause a message in the Driver
Information Centre.
In manual mode, no automatic
shifting to a higher gear takes place
at high engine revolutions, except
activating the kickdown function.
Gear shift indication
The symbol R or S with a number
beside it is indicated when gear
shifting is recommended for fuel
saving reasons.
Shift indication appears only in
manual mode.
Electronic driving programmes
● When SPORT mode is engaged,
the vehicle shifts at higher engine
speeds (unless cruise control is
on).
SPORT mode 3 179.● Special programmes
automatically adapt the shifting
points when driving up inclines or
down hills.
● In snowy or icy conditions or on other slippery surfaces, the
electronic transmission control
enables the driver to manually
select first, second or third gear
for starting off.
Kickdown
Pressing down the accelerator pedal
beyond the kickdown detent will lead
to maximum acceleration
independent of the selected driving
mode. The transmission shifts to a
lower gear depending on engine
speed and shifts to a higher gear at
high engine revolutions.
Overheat protection In the event of transmission-
overheating due to high outside
temperatures or sporty driving style,
the torque and the maximum speed of
the engine can be temporarily
reduced.

Driving and operating227(85% ethanol) and other fuels
containing more than 15% ethanol
must be used only in FlexFuel
vehicles.Caution
Do not use fuel containing
methanol. It can corrode metal
parts in the fuel system and also
damage plastic and rubber parts.
This damage would not be
covered by the vehicle warranty.
Some fuels, mainly high octane
racing fuels, can contain an octane
enhancing additive called
methylcyclopentadienyl manganese
tricarbonyl (MMT). Do not use fuels or fuel additives with MMT as they can
reduce spark plug life and affect
emission control system
performance. The malfunction
indicator light Z may illuminate
3 106. If this occurs, seek the
assistance of a workshop.
Fuel for diesel engines
Only use diesel fuel that complies
with EN 590 and which has a sulphur
concentration of max. 10 ppm.
Fuels with a biodiesel (compliant with
EN 14214) content of max. 7% by
volume may be used (e.g. named
B7).
If travelling in countries outside the
European Union occasional use of Euro-Diesel fuel with a sulphur
concentration below 50 ppm is
possible.
Caution
Frequent usage of diesel fuel
containing more than 15 ppm
sulphur will cause severe engine
damage.
Caution
Use of fuel that does not comply to EN 590 or similar can lead to
engine powerloss, increased wear
or engine damage and may affect
your warranty.
Do not use marine diesel oils, heating
oils, Aquazole and similar diesel-
water emulsions. Diesel fuels must
not be diluted with fuels for petrol
engines.
Low temperature operation At temperatures below 0 °C, some
diesel products with biodiesel blends may clog, freeze or gel, which mayaffect the fuel supply system. Starting
and engine operation may not work
properly. Make sure to fill winter
grade diesel fuel at ambient
temperatures below 0 °C.
Arctic grade diesel fuel can be used
in extreme cold temperatures below
-20 °C. Using this fuel grade in warm
or hot climates is not recommended

Vehicle care241Replacing 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 3 161.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 3 274.
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.

256Vehicle careNo.Circuit52–53–54–55–56Starter57–58–59Left headlight (LED)60Cooling fan61–62–63–64–65Climate control66–67–68–No.Circuit69Right high beam (Halogen) /
Right headlight (LED)70Left high beam (Halogen)71–72Starter73–74Transmission control module75Engine control module76Exhaust reduction system77–78Horn79Washer system80–81Engine control module82–83Ignition coil84Ignition coil85PowertrainNo.Circuit86–87Diesel fuel heating88Air shutter89–90–91–92After boil pump93Electronic key system94–95Coolant pump96Diesel fuel heating97–98–99Coolant pump
After having changed defective fuses,
close the fuse box cover and press
until it engages.
If the fuse box cover is not closed
correctly, malfunction may occur.

Vehicle care279Thoroughly rinse and leather-off the
vehicle. Rinse leather frequently. Use
separate leathers for painted and
glass surfaces: remnants of wax on the windows will impair vision.
Have the door hinges of all doors
greased by a workshop.
Exterior lights
Headlight and other light covers are
made of plastic. Do not use any
abrasive or caustic agents, do not use an ice scraper, and do not clean them
dry.
Polishing and waxing
Wax the vehicle regularly (at the
latest when water no longer beads).
Otherwise, the paintwork will dry out.
Polishing is necessary only if the paint
has become dull or if solid deposits
have become attached to it.
Paintwork polish with silicone forms a
protective film, making waxing
unnecessary.
Plastic body parts must not be treated with wax or polishing agents.Windows and windscreen wiper
blades
Switch off wipers before handling in
their areas.
Use a soft lint-free cloth or chamois leather together with window cleaner and insect remover.
When cleaning the rear window from
inside, always wipe in parallel to the
heating element to prevent damage.
For mechanical removal of ice, use a
sharp-edged ice scraper. Press the
scraper firmly against the glass so
that no dirt can get under it and
scratch the glass.
Clean smearing wiper blades with a
soft cloth and window cleaner.
Remove dirt residues from smearing
wiper blades by using a soft cloth and window cleaner. Also make sure to
remove any residues such as wax,
insect residues and similar from the
window.
Ice residues, pollution and continuous
wiping on dry windows will damage or
even destroy the wiper blades.Sunroof
Never clean with solvents or abrasive
agents, fuels, aggressive media
(e.g. paint cleaner, acetone-
containing solutions etc.), acidic or
highly alkaline media or abrasive
pads. Do not apply wax or polishing
agents to the sunroof.
Wheels and tyres
Do not use high-pressure jet
cleaners.
Clean rims with a pH-neutral wheel
cleaner.
Rims are painted and can be treated
with the same agents as the body.
Paintwork damageRectify minor paintwork damage witha touch-up pen before rust forms.
Have more extensive damage or rust
areas repaired by a workshop.
Underbody Some areas of the vehicle underbody
have a PVC undercoating while other
critical areas have a durable
protective wax coating.

316HHalogen headlights ....................243
Hand brake ................................. 174
Hazard warning flashers ............138
Headlight flash ........................... 136
Headlight range adjustment ......136
Headlights................................... 133
Headlights when driving abroad 136
Head restraint adjustment .............8
Head restraints ............................ 44
Head-up display.......................... 119 Heated mirrors ............................. 37
Heated rear window ..................... 41
Heated steering wheel .................87
Heated windscreen .......................41
Heating .................................. 53, 54
High beam ......................... 109, 134
High beam assist ................109, 134
Hill start assist ........................... 176
Horn ....................................... 13, 88
I
Identification plate .....................284
Immobiliser .......................... 35, 109
Indicators .................................... 100
Inductive charging ........................93
Info Display ................................. 117
Instrument cluster ........................95
Instrument panel fuse box .........257Instrument panel illumination
control .................................... 140
Instrument panel overview ........... 10
Interactive driving system ...........179
Interior care ............................... 280
Interior lighting ............................ 140
Interior lights ...................... 141, 253
Interior mirrors .............................. 38
Interruption of power supply ......172
Introduction .................................... 3
J
Jump starting ............................. 274
K Key, memorised settings ..............24
Keys ............................................. 19
Keys, locks ................................... 19
L
Lane change alert .......................212
Lane keep assist ................107, 223
Lashing eyes ............................... 79
LED headlights ...........109, 137, 245
Lighting features .........................142
Light switch ................................ 133
Load compartment ................28, 74
Load compartment cover .............77
Loading information .....................84
Low fuel ..................................... 109M
Malfunction indicator light ..........106
Manual anti-dazzle ......................38
Manual mode ............................. 170
Manual seat adjustment ...............47
Manual transmission .................. 173
Massage ....................................... 54
Memorised settings ......................24
Midlevel display .......................... 111
Mirror adjustment ........................... 8
Misted light covers .....................140
N New vehicle running-in ..............157
Number plate light .....................253
O Object detection systems ...........204
Odometer ................................... 101
Oil, engine .......................... 282, 286
OnStar ........................................ 128
Outside temperature ....................91
Overrun cut-off ........................... 161
P
Panoramic view system ..............214
Parking ................................ 18, 163
Parking assist ...................... 38, 204
Parking brake ............................ 175
Parking lights ............................. 140
Particulate filter ........................... 164

317Pedestrian detection...................110
Performance .............................. 291
Performing work ........................236
Power button .............................. 158
Power outlets ............................... 92
Power seat adjustment ................49
Power windows ............................ 39
Preheating ................................. 108
Puncture ..................................... 270
Q Quickheat ................................... 153
R Radio Frequency Identification (RFID) ..................................... 313
Radio remote control ...................20
REACH ....................................... 307
Reading lights ............................ 141
Rear cross traffic alert ................218
Rear floor storage cover ..............79
Rear fog light .............110, 139, 247
Rear seats .................................... 54
Rear storage ................................. 77
Rear view camera ...................... 216
Rear window wiper and washer ..90
Recommended fluids and lubricants ........................ 282, 286
Refuelling ................................... 228 Registered trademarks ...............309
Retained power off .....................159Reversing lights .........................140
Ride control systems ..................177
Roof .............................................. 42
Roof load ...................................... 84
Roof rack ..................................... 84
S
Safety belts ................................... 55
Safety net .................................... 80
Seat adjustment ............................. 6
Seat belt ........................................ 8
Seat belt reminder .....................104
Seat belts ..................................... 55
Seat heating Seat heating, front .....................53
Seat heating, rear .....................54
Seat position ................................ 46
Selective catalytic reduction .......166
Selector lever.............................. 169
Service ............................... 155, 281
Service display .......................... 103
Service information ....................281
Side airbag system ......................61
Side blind spot alert ....................211
Sidelights .................................... 133
Side turn lights ........................... 252
Software acknowledgement .......307
Software update ......................... 309
Spare wheel ............................... 270
Speed limiter....................... 110, 183Speedometer ............................. 100
Starting and operating ................157
Starting off ................................... 17
Starting the engine ....................159
Steering ...................................... 157
Steering wheel adjustment ......9, 87
Steering wheel controls ...............87
Stop-start system........................ 161
Storage ......................................... 72
Storage compartments .................72
Sunglasses storage .....................73
Sunroof ........................................ 42
Sunvisor lights ........................... 142
Sun visors .................................... 41
Symbols ......................................... 4
T
Tachometer ............................... 102
Tail lights ................................... 247
Three-point seat belt .................... 56
Tools .......................................... 258
Tow bar....................................... 230
Towing ................................ 230, 276
Towing another vehicle .............277
Towing equipment .....................231
Towing hitch installation dimensions ............................. 301
Towing the vehicle .....................276
Traction Control system ............. 177
Traction Control system off......... 108