fuel consumption MERCEDES-BENZ SLK ROADSTER 2014 Owners Manual

Problem (fault) ...............................1
50
Engine oil
Additives ........................................ 347
Checking the oil level ..................... 282
Checking the oil level using the
dipstick .......................................... 282
Display message ............................ 236
Filling capacity ............................... 347
Notes about oil grades ................... 346
Notes on oil level/consumption .... 282
Temperature (on-board com-
puter) ............................................. 219
Topping up ..................................... 282
Viscosity ........................................ 347
Environmental protection
Returning an end-of-life vehicle ....... 21
ESP® (Electronic Stability Pro-
gram)
AMG menu (on-board computer) ... 219
Characteristics ................................. 63
Deactivating/activating (AMG
vehicles) .......................................... 64
Deactivating/activating (notes;
except AMG vehicles) ..................... .64
Display message ............................ 223
ETS .................................................. 63
Function/note s................................ 62
General notes .................................. 62
Important safety guidelines ............. 63
Warning lamp ................................. 254
ETS (Electronic Traction System) ....... 63
Exhaust pipe (cleaning instruc-
tions) .................................................. 290
Exterior lighting
Settings options ............................. 110
see Lights
Exterior mirrors
Adjusting ....................................... 103
Anti-dazzle mode (automatic) ........ 104
Folding in when locking (on-board computer) ...................................... 218
Folding in/out (automatically )....... 104
Folding in/out (electrically) ........... 104
Out of position (troubleshooting) ... 104
Parking position ............................. 105
Resetting ....................................... 104
Storing settings (memory func-
tion) ............................................... 106 F
Fault message see Display messages
Filler cap
see Fuel filler flap
Fire extinguisher ............................... 295
First-aid kit ......................................... 294
Fitting a wheel
Fitting a wheel ............................... 327
Lowering the vehicle ...................... 328
Preparing the vehicle ..................... 324
Raising the vehicl e......................... 325
Removing a whee l.......................... 327
Securing the vehicle against roll-
ing away ........................................ 325
Flat tyre
MOExtended tyre s......................... 296
Preparing the vehicle ..................... 296
TIREFIT kit ...................................... 297
see Emergency spare wheel
Floormat ............................................. 276
Foglamps
Extended rang e.............................. 115
Switching on/of f........................... 111
Frequencies
Garage door opener ....................... 273
Mobile phone ................................. 340
Two-way radio ................................ 340
Front foglamps
Display message ............................ 233
Fuel
Additives ........................................ 345
Consumption information .............. 346
Consumption statistics .................. 204
Displaying the current consump-
tion ................................................ 204
Displaying the range ...................... 204
Driving tips .................................... 165
E10 ................................................ 344
Fuel gaug e....................................... 30
Grade (petrol) ................................ 344
Important safety notes .................. 343
Low outside temperature s............. 346
Notes for AMG vehicles ................. 344
Problem (malfunction) ................... 161
Quality (diesel )............................... 345
Refuelling ....................................... 158 10
Index

Protection of the environment
General notes
H
Environmental note
Daimler's declared policy is one of compre-
hensive environmental protection.
Our objectives are to use the natural resour-
ces which form the basis of our existence on
this planet sparingly and in a manner which
takes the requirements of both nature and
humanity into consideration.
You too can help to protect the environment
by operating your vehicle in an environmen-
tally-responsible manner.
Fuel consumption and the rate of engine,
transmission, brake and tyre wear depend on
the following factors:
R operating conditions of your vehicle
R your personal driving style
You can influence both factors. Therefore,
please bear the following in mind:
Operating conditions:
R avoid short trips, as these increase fuel
consumption.
R observe the correct tyre pressure.
R do not carry any unnecessary weight in the
vehicle.
R remove the roof rack once you no longer
need it.
R a regularly serviced vehicle will contribute
to environmental protection. You should
therefore adhere to the service intervals.
R all maintenance work should be carried out
at a qualified specialist workshop.
Personal driving style:
R do not depress the accelerator pedal when
starting the engine.
R do not warm up the engine when the vehicle
is stationary.
R drive carefully and maintain a safe distance
from the vehicle in front.
R avoid frequent, sudden acceleration and
braking. R
change gear in good time and use each gear
only up to Ôof its maximum engine speed.
R switch off the engine in stationary traffic.
R monitor the vehicle's fuel consumption. Returning an end-of-life vehicle
EU countries only:
Mercedes-Benz will take back your old vehicle to dispose of it in an environmentally-respon-sible manner in accordance with the Euro-
pean Union (EU) End of Life Vehicles Direc-
tive.
There is a network of return points and dis-
assembly plants available. You can return
your vehicle to these plants free of charge.
This makes a valuable contribution to the
recycling process and the conservation of
resources.
For further information on recycling old vehi- cles, recovery and the terms of the policy,
visit the Mercedes-Benz homepage. Genuine Mercedes-Benz parts
H
Environmental note
Daimler AG also supplies reconditioned
assemblies and parts which are of the same
quality as new parts. For these, the same war-
ranty applies as for new parts.
! Airbags and seat belt tensioners, as well
as control units and sensors for these
restraint systems, may be installed in the
following areas of your vehicle:
R doors
R door pillars
R door sills
R seats
R dashboard
R instrument cluster
R centre console Introduction
21 Z

Program selector button
General notes Example: program selector button
X Press program selector button :repeat-
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 156).
In addition to permanent drive program M,
you can also activate temporary drive pro-
gram M(Y page 155).
On 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 gearshifting
i
The automatic transmission switches to
automatic drive program E(drive program
C in AMG vehicles) each time the engine is
started.
i AMG vehicles:
when in drive program C
and under low load, the engine operates on
just four cylinders. This is the case in urban
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 155). Steering wheel gearshift paddles
:
Left-hand steering wheel gearshift paddle
; Right-hand steering wheel gearshift pad-
dle
In the manual drive program, you can change
gear using the steering wheel gearshift pad-
dles or the selector lever (Y page 155).
Further information about permanent drive
program M(Ypage 156).
Further information about temporary drive
program M(Ypage 155).
i The full range of functions of the steering
wheel gearshift paddles is available only
once the operating temperature is reached.
i You can only change gear with the steer-
ing wheel gearshift paddles when the trans-
mission is in position D.154
Automatic transmissionDriving and parking

Automatic drive program
Automatic drive programs E and S Drive program
E(drive program Con AMG
vehicles) is characterised by the following:
R comfort-orientated engine and transmis-
sion 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 accel-
erator 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 characterised 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 as a result of the later automatic transmis-
sion shift points, the fuel consumption pos-sibly being higher
Manual drive program M General notes
In this drive program, you can briefly change
gear yourself by using the steering wheel
gearshift paddles. The transmission must be
in position D.
You can activate manual drive program Min
the Eand Sautomatic drive programs.
i In addition to temporary drive program
M,
you can also activate permanent drive pro- gram M(Y page 154).
Further information about permanent drive program M(Y page 156). Activating
X Shift the transmission to position D.
X Pull the left or right steering wheel gearshift
paddle (Y page 154).
Manual drive program Mis temporarily acti-
vated. The selected gear and Mappear in
the multifunction display.
Upshifting X Briefly press the selector lever to the right
towards D+.
or
X Pull the right-hand steering wheel gearshift
paddle (Y page 154).
In cases where it is permissible, the auto-
matic transmission shifts up to the next
gear.
i If the maximum engine speed on the cur-
rently engaged gear is reached and you
continue to accelerate, the automatic
transmission automatically shifts up in
order to prevent engine damage.
Gearshift recommendation The gearshift recommendations assist you in
adopting an economical driving style. The rec- ommended gear is shown in the multifunction
display.
X Shift to recommended gear ;according
to gearshift recommendation :when
shown in the multifunction display of the
instrument cluster. Automatic trans
mission
155Driving an d parking Z

Driving tips
General notes
Important safety notes G
WARNING
If you switch off the ignition while driving,
safety-relevant functions are only available
with limitations, or not at all. This could affect, for example, the power steering and the brake
boosting effect. You will require considerably
more effort to steer and brake. There is a risk of an accident.
Do not switch off the ignition while driving.
Drive sensibly – save fuel Observe the following tips to save fuel:
R The tyres should always be inflated to the
recommended tyre pressure.
R Remove unnecessary loads.
R Warm up the engine at low engine speeds.
R Avoid frequent acceleration or braking.
R Observe the service intervals in the Service
Booklet or in the service interval display.
Have all the maintenance work carried out
in accordance with Daimler AG regulations.
Fuel consumption also increases when driv-
ing in cold weather, in stop-start traffic, on
short journeys and in hilly terrain. ECO display
ECO display (example: colour multifunction dis-
play)
The ECO display provides feedback on how
economical your driving characteristics are.
The ECO display assists you in achieving the
most economical driving style for the selec- ted settings and prevailing conditions. Con-
sumption can be significantly influenced by
your driving style.
The ECO display consists of three bars:
R Acceleration
Acceleration
R Constant Constant
R Coasting
Coasting
The percentage count is the mean value of the three bar values. The three bars and the mean
value begin at the value of 50%. A higher per- centage count indicates a more economical
driving style.
The ECO display does not indicate the actual
fuel consumption. A fixed percentage count
in the ECO display does not indicate a fixed
consumption.
In addition to driving style, the consumption is
affected by many other factors, such as:
R load
R tyre pressure
R cold start
R choice of route
R the use of electrical consumers
These factors are not included in the ECO dis-
play.
The evaluation of your driving style takes the following three categories into consideration:
R Accel. Accel. (evaluation of all acceleration pro-
cesses):
- the bar fills up: moderate acceleration,
especially at higher speeds
- the bar empties: sporty acceleration
R Constant
Constant (assessment of driving behav-
iour at all times):
- the bar fills up: constant speed and
avoidance of unnecessary acceleration
and deceleration
- the bar empties: fluctuations in speed
R Coasting Coasting (assessment of all deceleration
processes):
- the bar fills up: anticipatory driving, keep-
ing your distance and early release of the Driving tips
165Driving and pa rking Z

Trip menu
Standard display Example: standard display (colour multifunction
display)
X Press and hold the %button on the
steering wheel until the Trip
Trip menu with
trip meter :and total distance
recorder ;is shown.
Trip computer "From start" or "From
reset" Example: "From start" trip computer (colour multi-
function display)
: Distance
; Time
= Average speed
? Average fuel consumption
X Press the =or; button on the steer-
ing wheel to select the Trip
Trip menu.
X Press the 9or: button to select
From start From start orFrom reset
From reset.
The values in the From start
From startsubmenu are
calculated from the start of a journey whilst
the values in the From reset
From reset submenu are
calculated from the last time the submenu
was reset (Y page 205).
The From start From start trip computer is automati-
cally reset when: R
the ignition has been switched off for more
than four hours.
R 999 hours have been exceeded.
R 9,999 kilometres have been exceeded.
The From reset
From reset trip computer is automati-
cally reset if the value exceeds 9,999 hours or 99,999 kilometres.
ECO display ECO display (example: colour multifunction dis-
play)
X Press the =or; button on the steer-
ing wheel to select the Trip Tripmenu.
X Press the 9or: button to select
ECO DISPLAY
ECO DISPLAY.
If the ignition remains switched off for longer
than four hours, the ECO display will be auto- matically reset.
Further information on the ECO display; see
(Y page 165).
Displaying the range and current fuel
consumption Example: range and current fuel consumption (col-
our multifunction display)
X Press the =or; button on the steer-
ing wheel to select the Trip Tripmenu.
X Press the 9or: button to select the
current fuel consumption (not for AMG
vehicles) and the approximate range. 204
Menus and submenusOn-board computer and displays

The tyres are cold:
R if the vehicle has been parked with the tyres
out of direct sunlight for at least three
hours and
R if the vehicle has not been driven further
than 1.6 km
Depending on the ambient temperature, the
speed at which you are driving and the load on the tyres, the tyre temperature and thus the
tyre pressure changes by approximately
10 kPa (0.1 bar/1.5 psi) per 10 †. Take this
into account when checking the pressure of
warm tyres. Only correct the tyre pressure if it
is too low for the current operating condi-
tions.
Driving with tyre pressure that is too high or
too low can:
R shorten the service life of the tyres
R cause increased tyre damage
R have a negative effect on handling charac-
teristics and thus driving safety (e.g. aqua- planing)
For speeds up to 210 km/h (does not
apply to AMG vehicles): the values given on
the tyre pressure information label (fuel filler
flap) for speeds up to 210 km/h may be
reduced by 30 kPa (0.3 bar/4 psi) without a
reduction in safety. This improves the ride
comfort of your vehicle; however, the fuel
consumption may increase slightly.
i The tyre pressure values given for low
loads are minimum values which offer you
good ride comfort characteristics.
However, you can also use the values given for higher loads. These are permissible andwill not adversely affect the running of the
vehicle. Tyre pressure loss warning system
General notes While the vehicle is in motion, the tyre pres-
sure loss warning system monitors the set
tyre pressure using the rotational speed of the wheels. This enables the system to detect
significant pressure loss in a tyre. If the speed
of rotation of a wheel changes as a result of a loss of pressure, a corresponding warning
message will appear in the multifunction dis-
play.
You can recognise the tyre pressure loss
warning by the Run Flat Indicator
Run Flat Indicator
active Restart with OK active Restart with OK message which
appears in the Serv.
Serv. menu of the multifunc-
tion display. Information on the message dis- play can be found in the "Restarting the tyre
pressure loss warning system" section
(Y page 320).
Important safety notes The tyre pressure warning system does not
warn you of an incorrectly set tyre pressure.
Observe the notes on the recommended tyre
pressure (Y page 318).
The tyre pressure loss warning does not
replace the need to regularly check the tyre
pressures. An even loss of pressure on sev-
eral tyres at the same time cannot be detec-
ted by the tyre pressure loss warning system.
The tyre pressure monitor is not able to warn you of a sudden loss of pressure, e.g. if the
tyre is penetrated by a foreign object. In the
event of a sudden loss of pressure, bring the
vehicle to a halt by braking carefully. Avoid
abrupt steering manoeuvres.
The function of the tyre pressure loss warning
system is limited or delayed if:
R snow chains are fitted to your vehicle's
tyres.
R road conditions are wintry.
R you are driving on sand or gravel.
R you adopt a very sporty driving style (cor-
nering at high speeds or driving with high
rates of acceleration).
R you drive with a heavy load. Tyre pressure
319Wheels and tyres Z

X
Unscrew the centring pin.
X Tighten the last wheel bolt until it is finger-
tight.
X Vehicles with a collapsible emergency
spare wheel: inflate the collapsible emer-
gency spare wheel (Y page 335). Only then
lower the vehicle.
Lowering the vehicle G
WARNING
The wheels could work loose if the wheel nuts and bolts are not tightened to the specified
tightening torque. There is a risk of accident.
Have the tightening torque immediately
checked at a qualified specialist workshop
after a wheel is changed. X
Turn the crank of the jack anti-clockwise
until the vehicle is once again standing
firmly on the ground.
X Place the jack to one side.
X Tighten the wheel bolts evenly in a cross-
wise pattern in the sequence indicated ( :
to A). The specified tightening torque is
130 Nm.
X Turn the jack back to its initial position.
X Stow the jack and the rest of the vehicle
tools in the boot again.
X AMG vehicles and vehicles with AMG
equipment: insert the cover into the outer
sill.
X Check the air pressure of the newly fitted
wheel and adjust accordingly. Observe the recommended tyre pressure
(Y
page 318).
i If you are driving with the collapsible
emergency spare wheel fitted, the tyre
pressure loss warning system or the tyre
pressure monitor cannot function reliably.
Do not restart the tyre pressure loss warn- ing system/tyre pressure monitor until the
defective wheel has been replaced with a
new wheel.
Vehicles with a tyre pressure control
system: all fitted wheels must be equipped
with functioning sensors. Wheel and tyre combinations
General notes
! For safety reasons, Mercedes-Benz rec-
ommends that you only use tyres and
wheels which have been approved by
Mercedes-Benz specifically for your vehi-
cle.
These are specially adapted to the control
systems, such as ABS or ESP ®
and are
marked as follows:
R MO = Mercedes-Benz Original
R MOE = Mercedes-Benz Original Extended
(tyres featuring run-flat characteristics)
R MO1 = Mercedes-Benz Original (only cer-
tain AMG tyres)
Mercedes-Benz Original Extended tyres
may only be used on wheels that have been
specifically approved by Mercedes-Benz.
Only use tyres, wheels or accessories tes-
ted and approved by Mercedes-Benz. Cer-
tain characteristics, e.g. handling, vehicle
noise emissions or fuel consumption, may
otherwise be adversely affected. In addi-
tion, when driving with a load, tyre dimen-
sion variations could cause the tyres to
come into contact with the bodywork and
axle components. This could result in dam- age to the tyres or the vehicle. 328
Wheel and tyre combinationsWheels and tyres

Petrol (EN 228, E DIN 51626-1)
Fuel grade
!
Do not use diesel to refuel vehicles with a
petrol engine. Do not switch on the ignition if you accidentally refuel with the wrong
fuel. Otherwise, fuel can enter the fuel sys- tem. Even small amounts of the wrong fuel could result in damage to the fuel system
and the engine. Notify a qualified specialist
workshop and have the fuel tank and fuel
lines drained completely.
! Only refuel using premium-grade unlea-
ded petrol with at least 95 ROZ/85 MOZ,
that conforms to European standard
EN 228 or E DIN 51626–1 or an equivalent specification.
Fuel of this specification can contain up to 10 % ethanol.
Fuel that does not conform to EN 228 or
E DIN 51626–1 can lead to increased wear
and damage the engine and exhaust sys-
tem.
! Only use the fuel recommended. Operat-
ing the vehicle with other fuels can lead to
engine failure.
! Do not use the following:
R E85 (petrol with 85% ethanol)
R E100 (100% ethanol)
R M15 (petrol with 15% methanol)
R M30 (petrol with 30% methanol)
R M85 (petrol with 85% methanol)
R M100 (100% methanol)
R Petrol with additives containing metal
R Diesel
Do not mix such fuels with the fuel recom-
mended for your vehicle. Do not use addi-
tives. This can otherwise lead to engine
damage. This does not include cleaning
additives for the removal and prevention of residue build-up. Petrol must only be mixed
with additives recommended by Mercedes- Benz; see "Additives". You can obtain fur- ther information from any Mercedes-Benz
Service Centre.
Usually you will find information about the
fuel grade on the pump. If you cannot find the
label on the petrol pump, ask the filling sta-
tion staff.
i E10 fuel contains up to 10% bioethanol.
Your vehicle is suitable for use with E10
fuel. You can refuel your vehicle using E10
fuel.
As a temporary measure, if the recommended fuel is not available, you may also use unlea-
ded petrol with an octane rating of 91 RON/
82 MON. This may reduce engine perform-
ance and increase fuel consumption. Avoid
driving at full throttle and sudden accelera-
tion. Never refuel using fuel with a lower
RON/MON.
i In some countries, the available petrol
may not be sufficiently low in sulphur. This fuel can temporarily produce unpleasant
odours, especially on short journeys. As
soon as sulphur-free fuel (sulphur content
<1 0 ppm) is used for refuelling, the odours
are reduced.
Information on refuelling (Y page 158).
AMG vehicles
! Only refuel using super unleaded petrol
with at least 98 RON/88 MON that con-
forms to European standard EN 228 or an
equivalent specification.
You can otherwise impair engine output or
damage the engine.
! Premium-grade unleaded petrol with an
octane rating of 95 RON/85 MON may be
used as a temporary measure if the recom-
mended fuel is not available. This may
reduce engine performance and increase
fuel consumption. As much as possible,
avoid driving at full throttle.
! Regular unleaded petrol with an octane
rating of 91 RON/82.5 MON may also be
used as a temporary measure if the recom-
mended fuel is not available. 344
Service products and capacitiesTechnical data

Doing so results in noticeably higher fuel
consumption, and the engine power output is noticeably reduced. Avoid driving at full
throttle.
If only regular unleaded petrol with an
octane rating of 91 RON/82.5 MON or
lower is available, you must have the vehi-
cle adapted to this fuel at a qualified spe-
cialist workshop.
i E10 fuel contains up to 10% bioethanol.
Your vehicle is suitable for use with E10
fuel. You may refuel your vehicle using E10 fuel.
SLK 350
! Only refuel using unleaded, sulphur-free
unleaded petrol with at least 95 RON/
85 MON that conforms to European stand-
ard EN 228 or an equivalent specification.
You could otherwise impair engine output
or damage the emission control system.
i In some countries, the available petrol
may not be sufficiently low in sulphur. This
fuel can temporarily produce unpleasant
odours, especially on short journeys. As
soon as sulphur-free fuel (sulphur content
<1 0 ppm) is used for refuelling, the odours
are reduced.
Additives in petrol
! Operating the engine with fuel additives
added later can lead to engine failure. Do
not mix fuel additives with fuel. This does
not include additives for the removal and
prevention of residue build-up. Petrol must only be mixed with additives recommended
by Mercedes-Benz. Observe the instruc-
tions for use in the product description.
More information about recommended
additives can be obtained from any
Mercedes-Benz Service Centre.
Mercedes-Benz recommends that you use
fuel brands that have additives.
The quality of the fuel available in some coun- tries may not be sufficient. Residue could
build up in the injection system as a result. In this case, in consultation with a Mercedes-
Benz Service Centre, the petrol may be mixed
with the cleaning additive recommended by
Mercedes-Benz. Always observe the notes
and mixing ratios specified on the container.
Diesel (EN 590) Fuel grade
G
WARNING
If you mix diesel fuel with petrol, the flash
point of this fuel mixture is lower than that of pure diesel fuel. When the engine is running,
components in the exhaust system may over-
heat unnoticed. There is a risk of fire.
Never refuel with petrol. Never add petrol to
diesel fuel.
! When refuelling, only use diesel fuel that
conforms to the European standard EN 590
or is of equivalent quality. Fuel that does
not conform to EN 590 can lead to
increased wear as well as damage to the
engine and exhaust system.
! Do not use the following:
R marine diesel
R heating oil
R bio-diesel
R vegetable oil
R petrol
R paraffin
R kerosene
Do not mix such fuels with diesel fuel and
do not use any special additives. This can
otherwise lead to engine damage. This
does not include flow improver additives.
For further information, see "Flow improv-
ers".
! Vehicles with diesel particle filters:
in
countries outside the EU, only use low sul-
phur Euro diesel with a sulphur content of
under 50 ppm. Otherwise, the emission
control system could be damaged. Service products and capacities
345Technical data Z