2015 MERCEDES-BENZ SLK-Class engine

SLK 350
The engine starts automatically if:
R you switch off the ECO start/stop function
by pressing the ECO button.
R in transmission position Dor Nthe brake
pedal is released and the HOLD function is not active.
R you depress the accelerator pedal.
R you engage reverse gear R.
R you move the transmission out of position
P.
R you unfasten your seat belt or open the
driver's door.
R the vehicle starts to roll.
R the brake system requires this.
R the temperature in the vehicle interior devi-
ates from the set range.
R the system detects moisture on the wind-
shield when the air-conditioning system is
switched on.
R the battery's condition of charge is too low.
i Shifting the transmission to position
P
does not start the engine.
SLK 55 AMG
The engine starts automatically if:
R you switch off the ECO start/stop function
by pressing the ECO button.
R in transmission position Dor Nthe brake
pedal is released and the HOLD function is not active.
R you depress the accelerator pedal.
R you engage reverse gear R.
R you move the transmission out of position
P.
R you switch to drive program Sor M.
R you unfasten your seat belt or open the
driver's door.
R the vehicle starts to roll.
R the brake system requires this.
R the temperature in the vehicle interior devi-
ates from the set range. R
the system detects moisture on the wind-
shield when the air-conditioning system is
switched on.
R the battery's condition of charge is too low.
i Shifting the transmission to position
P
does not start the engine.
i If you shift the transmission from
Rto D,
the ECO start/stop function is available
again once the 00D6ECO symbol reap-
pears in green in the multifunction display.
Deactivating/activating the ECO start/
stop function SLK 250
X
To deactivate: press ECO button 0043.
Indicator lamp 0044and the 00D6ECO sym-
bol in the multifunction display go out.
X To activate: press ECO button 0043.
Indicator lamp 0044lights up.
If all conditions for automatic engine
switch-off (Y page 144) are fulfilled, the
00D6 ECO symbol is shown in green in the
multifunction display.
If not all conditions for automatic engine
switch-off (Y page 144) are fulfilled, the
00D6 ECO symbol is shown in yellow in the
multifunction display.
If this is the case, the ECO start/stop func-
tion is not available.
Conditions for the automatic engine
switch-off (Y page 144). Driving
147Driving and parking Z

i
If indicator lamp
0044is off, the ECO start/
stop function has been deactivated man-
ually or as the result of a malfunction. The
engine will then not be switched off auto-
matically when the vehicle stops.
i The ECO start/stop function is activated
each time the engine is switched on.
SLK 350 X
To deactivate: press ECO button 0043.
Indicator lamp 0044goes out.
X To activate: press ECO button 0043.
Indicator lamp 0044lights up.
i If indicator lamp
0044is off, the ECO start/
stop function has been deactivated man-
ually or as the result of a malfunction. The
engine will then not be switched off auto-
matically when the vehicle stops.
i The ECO start/stop function is activated
each time the engine is switched on.
SLK 55 AMG X
To switch off: in drive program C, press
ECO button 0043.
or X Switch to drive program Sor M
(Y page 153).
Indicator lamp 0044and the 00D6ECO sym-
bol in the multifunction display go out.
X To activate: press ECO button 0043.
Indicator lamp 0044lights up. If drive pro-
gram Sor Mis active, the automatic trans-
mission switches to drive program C.
If all conditions for automatic engine
switch-off (Y page 144) are fulfilled, the
00D6 ECO symbol is shown in green in the
multifunction display.
If not all conditions for automatic engine
switch-off (Y page 144) are fulfilled, the
00D6 ECO symbol is shown in yellow in the
multifunction display.
If this is the case, the ECO start/stop func-
tion is not available.
Conditions for the automatic engine
switch-off (Y page 144).
i If indicator lamp
0044is off, the ECO start/
stop function has been deactivated man-
ually or as the result of a malfunction. The
engine will then not be switched off auto-
matically when the vehicle stops.
i Each time the engine is started, the ECO
start/stop function switches to the status
(on or off) that was selected before switch- ing off the engine. 148
DrivingDriving and parking

Problems with the engine
Problem
Possible causes/consequences and
0050
0050Solutions The engine does not
start. The HOLD function or DISTRONIC PLUS is activated.
X Deactivate the HOLD function (Y page 181) or DISTRONIC
PLUS (Y page 171).
X Try to start the engine again. The engine does not
start. The starter motor
can be heard. R
There is a malfunction in the engine electronics.
R There is a malfunction in the fuel supply.
X Turn the SmartKey back to position 0in the ignition lock before
attempting to start the engine again.
or
X Press the Start/Stop button repeatedly until all indicator lamps
in the instrument cluster go out.
X Try to start the engine again (Y page 141). Avoid excessively
long and frequent attempts to start the engine as these will drain
the battery.
If the engine does not start after several attempts: X Consult a qualified specialist workshop. 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 301).
If the engine does not start despite attempts to jump-start it:
X Consult a qualified specialist workshop. The starter motor was exposed to a thermal 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 a qualified specialist workshop. The engine is not run-
ning smoothly and is
misfiring. There is a malfunction in the engine electronics or in a mechanical
component of the 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 a qualified specialist
workshop. Driving
149Driving and parking Z

Problem
Possible causes/consequences and
0050
0050Solutions The coolant tempera-
ture gauge shows a
value above 248 ‡
(120 †). The coolant
warning lamp may also
be on 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 281). Observe the warning
notes as you do so and add 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 At coolant temperatures below 248 ‡ (120 †), drive to the
nearest qualified specialist workshop.
X Avoid heavy loads on the engine as you do so, e.g. driving in
mountainous terrain and start/stop traffic. Manual transmission
Gear lever
! Only engage gear when the clutch pedal is
depressed.
! When shifting between
5thand 6thgear,
you should always push the gear lever all
the way to the right. You could otherwise
shift unintentionally into 3rdor4th gear
and damage the transmission.
If you shift down at too high a speed (trans-
mission braking), this can cause the engine to overrev, leading to engine damage.
Never hold the vehicle stopped on a hill by
using the clutch pedal. There is otherwise a risk of damaging the clutch. Gear lever
005E
Reverse gear
0047 -004C
Forward gears Engaging reverse gear
! Only shift into reverse gear
Rwhen the
vehicle is stationary. Otherwise, you could
damage the transmission.
X Stop the vehicle.
X Depress the clutch pedal fully.
X Shift to neutral N.
X Move the gear lever firmly to the left
beyond the point of resistance and then
forwards. 150
Manual transmissionDriving and parking

i
The ECO start/stop function is not avail-
able when reverse gear is engaged.
Further information on the ECO start/stop function (Y page 144). Shift recommendation
X
Shift gear according to gearshift recom-
mendation 0043when shown in the multi-
function display of the instrument cluster.
The gearshift recommendations assist you in adopting an economical driving style. The rec- ommended gear is shown in the multifunctiondisplay. Automatic transmission
Important safety notes
G
WARNING
If the engine speed is above the idling speed
and you engage transmission position Dor R,
the vehicle could pull away suddenly. There is a risk of an accident.
When engaging transmission position Dor R,
always firmly depress the brake pedal and do not simultaneously accelerate. G
WARNING
The automatic transmission switches to neu-
tral position Nwhen you switch off the engine.
The vehicle may roll away. There is a risk of an
accident.
After switching off the engine, always switch
to parking position P. Prevent the parked vehi-
cle from rolling away by applying the parking
brake. Selector lever
Overview of transmission positions Selector lever
005D
Park position with selector lever lock
005E Reverse gear
005C Neutral
005B Drive
Transmission position and drive pro-
gram display 0043
Transmission position display
0044 Drive program display
The current position of the selector lever is
shown by the indicators next to the selector
lever.
The indicators light up when the SmartKey is inserted into the ignition lock. The indicators go out when the SmartKey is removed from
the ignition lock. Automatic transmission
151Driving and parking Z

Transmission positions
0045 Park position
Do not shift the transmission into
position P(Y page 151) unless the
vehicle is stationary. The parking
lock should not be used as a brake when parking. Always apply the
electronic parking brake in addi-
tion to the parking lock in order to
secure the vehicle.
The SmartKey can only be removedif the transmission is in position P.
If the SmartKey is removed from
the ignition lock, the selector lever
is locked.
If the vehicle electronics are mal-
functioning, the selector lever may be locked in position P. To release
a locked selector lever, see "Man-
ual override of parking lock"
(Y page 158). 0046 Reverse gear
Only shift the transmission to R
when the vehicle is stationary. 0044 Neutral
Do not shift the transmission to
N
while driving. Otherwise, the auto-
matic transmission could be dam-
aged.
No power is transmitted from the
engine to the drive wheels.
Releasing the brake pedal will allow
you to move the vehicle freely, e.g. to push it or tow it.
If ESP ®
is deactivated or faulty:
only shift the transmission to posi-
tion Nif the vehicle is in danger of
skidding, e.g. on icy roads.
! Rolling in neutral
Ncan damage
the drive train. 003A Drive
The automatic transmission
changes gear automatically. All
forward gears are available.
Driving tips
Changing gear The automatic transmission shifts to the indi-
vidual gears automatically when it is in trans-
mission position D. This automatic gear shift-
ing behavior is determined by:
R the selected drive program (Y page 153)
R the position of the accelerator pedal
(Y page 152)
R the road speed
Accelerator pedal position Your style of driving influences how the auto-
matic transmission shifts gear:
R little throttle: early upshifts
R more throttle: late upshifts 152
Automatic transmissionDriving an
d parking

Double-clutch function
When shifting down, the double-clutch func-
tion is active regardless of the currently selec-
ted drive program. The double-clutch function reduces load change reactions and is condu-cive to a sporty driving style. The sound gen-
erated by the double-clutch function depends
on the drive program selected.
Kickdown Use kickdown for maximum acceleration.
X Depress the accelerator pedal beyond the
pressure point.
The automatic transmission shifts to a
lower gear depending on the engine speed.
X Ease off the accelerator pedal once the
desired speed is reached.
The automatic transmission shifts back up. Program selector button
General notes Example: program selector button
X Press program selector button 0043repeat-
edly until the letter for the desired gearshift program appears in the multifunction dis-
play.
The program selector button allows you to
choose between different driving character-
istics.
i Further information about permanent
drive program M(Y page 155). As well as this permanent drive program
M,
you can also activate temporary drive pro-
gram M(Y page 154).
In AMG vehicles, drive program Eis called
drive program C. E
Economy
C Controlled
Efficiency Comfortable, economical
driving
S
Sport Sporty driving style
M
Manual Manual gear shifting
Only change from automatic drive program
E
or Sto manual drive program Mwhen the
vehicle is stationary.
i When the engine is started, the automatic
transmission always switches to automatic drive program E(drive program Cin AMG
vehicles).
i AMG vehicles:
when in drive program C
and with a small load demand, the engine
will automatically only operate with four
cylinders. This is the case in city traffic or
on a country road, for example. This
reduces fuel consumption. Cylinder shut-
off is inactive in drive programs Sand M, so
that the engine will operate with all eight
cylinders.
i For further information on the automatic
drive program, see (Y page 154). Automatic transmission
153Driving and parking Z

Steering wheel paddle shifters
0043
Left-hand steering wheel paddle shifter
0044 Right-hand steering wheel paddle shifter
In the manual drive program, you can change
gear using the steering wheel paddle shifters or the selector lever (Y page 154).
Further information about permanent drive
program M(Y page 155).
Further information about temporary drive
program M(Y page 154).
i The full range of functions for the steering
wheel paddle shifters is available only once
operating temperature has been reached.
i You can only change gear with the steer-
ing wheel paddle shifters when the trans-
mission is in position D.Automatic drive program
Automatic drive programs E and S Drive program
E(drive program Con MAG
vehicles) is characterized by the following:
R comfort-oriented engine and transmission
settings
R optimal fuel consumption resulting from
the automatic transmission shifting up
sooner
R the vehicle pulling away more gently in
forward and reverse gears, unless the
accelerator pedal is depressed fully R
increased sensitivity. This improves driving
stability on slippery road surfaces, for
example
R the automatic transmission shifting up
sooner. This results in the vehicle being
driven at lower engine speeds and the
wheels being less likely to spin
Drive program Sis characterized by the fol-
lowing:
R sporty engine and transmission settings
R the vehicle pulling away in first gear
R the automatic transmission shifting up
later
R the fuel consumption possibly being higher
as a result of the later automatic transmis- sion shift points
Manual drive program M General notes
In this drive program, you can briefly change
gear yourself by using the steering wheel pad-
dle shifters. The transmission must be in posi- tion D.
You can activate manual drive program Min
the Eand Sautomatic drive programs.
i As well as temporary drive program
M,
you can also activate permanent drive pro-
gram M(Y page 153).
Further information about permanent drive program M(Y page 155).
Activating
X Shift the transmission to position D.
X Pull the left or right steering wheel paddle
shifter (Y page 154).
Manual drive program Mis temporarily acti-
vated. The selected gear and Mappear in
the multifunction display. 154
Automatic transmissionDriving and parking