2012 MERCEDES-BENZ CLS COUPE fuel

Problems with the auxiliary heating/ventilation
Display messages Possible causes/consequences and
M Solutions
FAIL The starter battery is not charged sufficiently or the system is
faulty.
X
Charge the starter battery.
X Make another attempt to switch on the auxiliary heating using
the remote control.
X Have the auxiliary heating checked at aqualified specialist
workshop. $
FAIL The signal transmission between the transmitter and the vehicle
is faulty.
X
Change your position in relation to the vehicle, moving closer if
necessary.
X Make another attempt to switch the auxiliary heating on or off
using the remote control. ©
FAIL There is not enough fuel in the fuel tank,ort
he auxiliary heating
is faulty.
X Refuel at the nearest filling station.
X Make another attempt to switch on the auxiliary heating using
the remote control.
X Have the auxiliary heating checked at aqualified specialist
workshop. Adjusting the air vents
Important safety notes
G
WARNING
Very hot or very cold air can flow from the air
vents. This could cause burns or frostbit eto
bare skin in the immediate vicinity of the
vents. Keep bare skin away from these air
outlets. If necessary, direct the airflow away
to ad ifferent area of the vehicle interior. In order to ensure the direct flow of fresh air
through the air ventsi
nto the vehicle interior,
please observe the following notes:
R keep the air inlet between the windscreen
and the bonnet free of blockages, such as
ice, snow or leaves.
R never cover the ventsorv entilation grilles
in the vehicle interior. 136
Adjusting the air ventsClimate control

Useful information
............................140
Running-in notes ............................... 140
Driving ............................................... 140
Automatic transmission ...................148
Refuelling ........................................... 156
Parking ............................................... 159
Driving tips ........................................ 161
Driving systems ................................ 165 139Driving and parking

i
Upshifts take place at higher engine
speeds after acold start. This helps the
catalytic converter to reach its operating
temperature more quickly.
Hill start assist G
WARNING
After ashort time, hill start assist will no lon-
ger brake your vehicle and it could roll away.
There is arisk of an accident and injury.
Therefore, quickly move your foot from the
brake pedal to the accelerator pedal.N ever
leave the vehicle when it is held by hill start
assist.
Hill start assist helps you when pulling away
forwards or in reverse on an uphill gradient.
It holds the vehicle for ashort time after you
have removed your foot from the brake pedal.
This gives you enough time to move your foot
from the brake pedal to the accelerator pedal
and depress it before the vehicle begins to
roll.
X Take your foot off the brake pedal.
The vehicle is then held for about asecond.
X Pull away.
Hill start assist will not function if:
R you are pulling away on alevel road or a
downhill gradient.
R the transmission is in position N.
R the parking brake is applied.
R ESP ®
is malfunctioning. ECO start/stop function
Important safety notes G
WARNING
If the engine is switched off automatically and
you exit the vehicle, the engine is restarted
automatically. The vehicle may begin moving.
There is arisk of acciden tand injury. If you wish to exit the vehicle, alway
sturn off
the ignition and secure the vehicle against
rolling away.
General notes The ECO start/stop function switches the
engine off automatically if the vehicle stops
moving.
When pulling away again, the engine starts
automatically. The ECO start/stop function
thereby helps you to reduce the fuel con-
sumption and emissions of your vehicle.
Ever
ytime you switch on the engine using the
key or the Start/Stop button ,the ECO start/
stop function is activated.
AMG vehicles: the ECO start/stop function
is only available in drive program C.
The system is operational when ECO symbol
¤ is shown in green in the multifunction
display.
AMG vehicles: the AMG menu in the multi-
function display additionally shows the Stop/ Start active message.
If conditions for automatic engine switch-off
have not been fulfilled (Y page 145), the
¤ symbol will be shown in yellow.
AMG vehicles: the AMG menu in the multi-
function display additionally shows the Stop/ Start inactive message.
If the ECO start/stop function has been man-
ually deactivated (Y page 145)oramalfunc-
tion has caused the system to be deactivated,
the ¤ symbol is not displayed.
AMG vehicles: in the AMG menu on the mul-
tifunction display, the Stop/Start active or
Stop/Start inactive display message
disappears.
If the engine is switched off and the ¤
symbol is shown in green in the multifunction
display, the engine has been switched off
automatically. However, all vehicle systems
remain active. 144
DrivingDriving and parking

Problems with the engine
Problem Possible causes/consequences and
M Solutions
The engine does not
start. The HOLD function or DISTRONIC PLUS is activated.
X
Deactivat ethe HOLD function (Y page 179) or DISTRONIC
PLUS (Y page 177).
X Try to start the engine again. The engine does not
start. The starter motor
can be heard. R
There is amalfunction in the engine electronics.
R There is amalfunction in the fuel supply.
X Before attempting to start the engine again, turn the key in the
ignition back to position 0or press the Start/Stop button
repeatedly until all indicator lamps in the instrumen tcluster go
out.
X Try to start the engine again (Y page 142). Avoid excessively
long and frequent attempt stostart the engine, as this will drain
the battery.
If the engine does not start after several attempts:
X Consult aqualified specialist workshop. The engine does not
start
.The starter motor
can be heard. The
reserve fuel warning
lamp is lit and the fuel
gauge displays hows0. The fuel tank is empty.
X
Refuel the vehicle. The engine does not
start. You cannot hear
the starter motor. The on-board voltage is too low because the battery is too weak
or discharged.
X
Jump-start the vehicle (Y page 319).
If the engine does not start despite attemptstoj ump-start it:
X Consult aqualified specialist workshop. The starter motor was exposed to
athermal load that was too high.
X Allow the starter motor to cool down for approximately two
minutes.
X Try to start the engine again.
If the engine still does not start:
X Consult aqualified specialist workshop. Driving
147Driving and parking Z

Problem Possible causes/consequences and
M Solutions
Vehicles with
apetrol
engine:
The engine is not run-
ning smoothly and is
misfiring. There is
amalfunction in the engine electronics or in amechanical
componentoft he engine management system.
X Only depress the accelerator pedal slightly.
Otherwise, non-combusted fuel may get into the catalytic con-
verter and damage it.
X Have the cause rectified immediately at aqualified specialist
workshop. The coolant tempera-
ture display is showing
more than 120 †. The
coolant warning lamp
may also be lit and a
warning tone may
sound. The coolant level is too low. The coolant is too hot and the engine
is no longer being cooled sufficiently.
X
Stop as soon as possible and allow the engine and the coolant
to cool down.
X Check the coolant level (Y page 299). Observe the warning
notes as you do so and top up the coolant if necessary. If the coolant level is correct, the engine radiator fan may be faulty.
The coolant is too hot and the engine is no longer being cooled
sufficiently.
X
If the coolant temperature is below 120 †, you can continue
driving to the nearest qualified specialist workshop.
X Avoid heavy loads on the engine as you do so, e.g. driving in
mountainous terrain and stop-start traffic. Automatic transmission
Important safety notes
G
WARNING
If the engine speed is above the idling speed
and you engage transmission position Dor
R,t he vehicle could pull away suddenly. There
is ar isk of an accident.
When engaging transmission position Dor R,
always firmly depress the brake pedal and do
not simultaneously accelerate. Selector lever
Overview of transmission positions Selector lever in AMG vehicles with
Pbutton
j Park position with parking lock
k Reverse gear
i Neutral
h Drive 148
Automatic transmissionDriving and parking

E
Economy Comfortable, economical
driving S
Sport Sporty driving style
M
Manual Manua
lgears hifting i
For furthe rinformation on the automatic
drive program, se e(Ypage 152).
i Thea utomatic transmission switches to
automatic drive program Eeach tim ethe
engine is started.
AM Gvehicles Drive program selecto
rwith manual drive program
X Turn drive program selector :until the
desired drive program appears in the mul-
tifunction display in the speedometer.
The drive program indicator on drive pro-
gram selector :light supinr ed. C
Controlled
Efficiency Comfortable, economical
driving
S
Sport Sporty drivin
gstyle S+
SportPlus Extremely sport
ydriving
style M
Manual Manual gearshifting
RS
RACE
START Optimal vehicle accelera-
tion from
astandstill i
For further information on the automatic
drive program, see (Y page 152). i
The automatic transmission switches to
automatic drive program Ceach tim ethe
engin eisstarted.
i RScannot be selected during normal driv-
ing. For further information on RACE
START, see (Y page 180). Steering wheel gearshift paddles
:
Left-han dsteerin gwheel gearshif tpaddle
; Right-hand steering wheel gearshif tpad-
dle
You can restrict or derestric tthe shif trange
by usin gthe steering wheel gearshif tpaddles.
You can chang egear yourself by usin gthe
steering wheel gearshif tpaddle in th emanual
driv eprogram.
i You can only chang egear wit hthe steer-
ing wheel gearshif tpaddles when th etrans-
mission is in position D. Automatic drive program
Drive program E(drive program Con AMG
vehicles) is characterised by th efollowing:
R comfort-oriente denginea nd automatic
transmission settings
R optimal fuel consumption resulting from
th ea utomatic transmission shiftin gup
sooner
R thev ehicle pullin gaway mor egently in
forward and revers egears, unless the
accelerator pedal is depressed fully 152
Automatic transmissionDriving and parking

R
increased sensitivity. This improves driving
stability on slipper yroad surfaces, for
example
R the automatic transmission shifting up
sooner. This result sinthe vehicle being
drive natl ower engine speeds and the
wheels being less likely to spin
Drive program S(or, in the case of AMG vehi-
cles, drive programs Sand S+)isc haracter-
ised by the following:
R sporty engine and automatic transmission
settings
R the vehicle pulling away in first gear
R the automatic transmission shiftin gup
later
R as aresult of the later automatic transmis-
sion shift points, the fuel consumption pos-
sibly being higher. Shift ranges
Introduction i
OnAMG vehicles andvehicles with
steering wheel gearshift paddles,y ou
can restrict or derestric tthe shift range
using the steerin gwheel gearshift paddles.
When the automatic transmission is in posi-
tion D,itisp ossible to restrict or derestrict
the shift range (Y page 153).
The shift range selected is shown in the mul-
tifunction display .The automatic transmis-
sion shifts only as far as the selected gear. Shift range: =
To use the engine's braking effect
5
To use the braking effect of the
engine on downhill gradients and
for driving:
R
on steep mountain roads
R in mountainous terrain
R in arduousc onditions 4
To use the braking effect of the
engine on extremely steep downhill
gradients and on long downhill
stretches
Restricting the shift range
X
Pull the left-hand steering wheel gearshift
paddle.
The automatic transmission shifts down
one gear and restrictst he shift range to the
relevant gear.
i If the engine exceeds the maximum
engine speed when shifting down, the auto-
matic transmission protectsa gainst engine
damage by not shifting down.
i If the maximum engine speed for the shift
range is reached and you continue to accel-
erate, the automatic transmission shifts up,
even if the shift range is restricted. This
prevents the engine from overrevving.
Extending the shift range X
Pull the right-hand steering wheel gearshift
paddle.
The shift range is derestricted. Automatic transmission
153Driving and parking Z

Clearing th
eshiftrange restriction X
Pul lthe right-hand steering wheel gearshift
paddle until the numbe rfor the gear disap-
pears from the multifunction display.
or
X Shift the transmission to position D.
The automatic transmission shifts from the
current shift range directly to D.
Selecting the ideal shift range X
Pull the left-hand steerin gwheel gearshift
paddle and hold it in position.
The automatic transmission shifts to the
gear which allowso ptimum acceleration
and deceleration. To do this, the automatic
transmission shifts down one or more
gears. Manual drive program
Activating the manuald rive programX
Press the program selector button
(Y page 151) repeatedly until Mappears in
the multifunction display.
X AMG vehicles: turn the drive program
selector (Y page 152) until Mappears in the
multifunction display.
The indicator Mon the drive program selec-
tor lights up in red.
AMG vehiclesa nd vehicleswithaDIRECT
SELECT lever: you can select manual drive
program Musin gthe program selector or the
driv eprogram selector button. In manual
driv eprogram M,you can chang egear using
th es teering wheel gearshif tpaddles if the
transmission is in position D.
Upshifting !
In manual gearshif tprogram M,the auto-
matic transmission does not shift up auto-
matically even when the engine limiting
spee dfor the current gearisr eached.
When the engine limiting speed is reached, the fuel supplyisc
ut to prevent the engine
from overrevving. You must make sure that
the engine speed does not reach the red
area of the rev counter. Otherwise, there is
ar isk of engine damage.
X Pull the right-hand steering wheel gearshift
paddle.
The automatic transmission shifts up to the
next gear.
AMG vehicles
X If the colour in the multifunction displayin
the speedometer changes to red and the
UP displaym
essage is shown, shift up a
gear.
Downshifting X
Pull the left-hand steering wheel gearshift
paddle.
The automatic transmission shifts down to
the next gear.
i If you slow down or stop without shifting
down, the automatic transmission auto-
matically shifts down.
i For maximum acceleration, pull the left-
hand steering wheel gearshift paddleu ntil
the transmission selects the optimum gear
for the current speed.
Kickdown You can also use kickdown for maximum
acceleration in manual drive program
M.
X Depress the accelerator pedal beyond the
pressure point.
The transmission shifts to alower gear
depending on the engine speed.
X Shift back up once the desired speed is
reached.
i AMG vehicles: it is not possible to use
kickdown in manual drive program M.154
Automatic transmissionDriving and parking