
1, 2, 3 ...
12 Vsocket
see Socket A
ABS (Anti-lock Braking System) Display message ............................ 200
Function/notes ................................ 54
Important safety notes ....................54
Warning lamp ................................. 226
Activating/deactivating air-recir-
culation mode .................................... 121
Activating/deactivating cooling
with air dehumidification .................117
Active light function .........................104
Active Service Syste mPLUS
see ASSYS TPLUS service interval
display
ADAPTIVE BRAKE .................................59
Adaptive brake lamps .........................56
Additional speedometer ...................191
Additives (engine oil) ........................308
Adjusting the headlamp range .........102
Airbag Headbag .......................................... 43
Airbags
Front airbag (driver, front
passenger )....................................... 41
Important safety guidelines .............40
Sidebag ............................................ 42
Triggering ......................................... 39
Air-conditioning system
see Climate control
AIRGUIDE ............................................. 84
Air pressure see Tyre pressure
AIRSCARF
Problem (malfunction) .....................92
Setting the vents ........................... 123
Switching on/off .............................. 91
Airv ents
Important safet ynotes .................. 122
Setting ........................................... 122
Setting the AIRSCARF vents ..........123
Setting the centre air vents ...........123 Setting the side air vents
...............123
Switching AIRSCARF on/off ............91
Alarm system
see ATA (Anti-Theft Alarm system)
Alertness Assistant
see ATTENTION ASSIST
Ambient lighting (on-board com-
puter) ................................................. .192
AMG menu (on-board computer) .....195
Anti-glare film .................................... 246
Anti-loc kBraking System
see ABS (Anti-lock Braking System)
Anti-Theft Alarm system
see ATA (Anti-Theft Alarm system)
Aquaplaning ....................................... 150
Ashtray ............................................... 240
Assistance menu (on-board com-
puter) ................................................. .189
ASSYST PLUS see ASSYST PLUS service interval
display
ASSYST PLUS service interval dis-
play
Displaying service messages .........253
Hiding service messages ...............253
Notes ............................................. 253
Service messages ..........................252
ATA (Anti-Theft Alarm system)
Activating/deactivating ...................61
Function .......................................... .61
Interior motion sensor .....................62
Switching off the alarm ....................61
Tow-away protection ........................ 62
ATTENTIO NASSIST
Activating/deactivating .................190
Display message ............................ 213
Function/notes ............................. 173
Audio menu (on-board computer) ....186
Authorised workshop see Qualified specialist workshop
AUTO lights
Display message ............................ 211
see Lights
Automatic engine start (ECO start/
stop function) .................................... 132
Automatic engine switch-off (ECO
start/stop function) ..........................1314
Index 

Running-in tips ..............................
.126
Snow chains .................................. 289
Symmetrical dipped bea m............. 100
Tyr egrip ........................................ 150
Wet road surface ........................... 149
DVD audio (on-board computer) ......186
Dynamic handling package Function/notes ............................. 164 E
EASY-ENTRY feature Activating/deactivating .................194
Function/notes ................................ 93
EASY-EXIT feature
Crash-responsive ............................. 93
Function/notes ................................ 93
Switching on/off ........................... 194
EBD (electronic brake force distri-
bution)
Display message ............................ 202
Function/notes ................................ 59
ECO start/stop function
Deactivating/activating .................132
General information .......................131
Important safety notes ..................130
Electrical fuses
see Fuses
Electronic brake force distribution
see EBD (electronic brake force
distribution)
Electronic Brake force Distribution
see EBD (Electronic Brake force
Distribution)
Electronic Stability Program
see ESP ®
(Electroni cStability Program)
Electronic Traction System
see ETS (Electronic Traction System)
Emergenc ykey
Unlocking the driver's door ..............73
Emergency key element
Function/notes ................................ 68
Locking vehicle ................................ 73
Emergency release
Driver's door .................................... 73Emergency spare wheel
Inflating the collapsible spare
wheel ............................................. 270
Notes/data .................................... 297
Storage location ............................ 262
Stowing .......................................... 262
Emergency unlocking
Boot ................................................. 75
Vehicle ............................................. 73
Engine
Display message ............................ 211
ECO start/stop function ................130
Engine number ............................... 303
Jump-starting ................................. 277
Running irregularl y......................... 134
Starting problems ..........................134
Starting the engine with the key ....129
Starting with KEYLESS GO .............129
Stopping ........................................ 146
Tow-starting (vehicle) ..................... 281
Warning lamp (engine diagnos-
tics) ............................................... 231
Engine electronics
Notes ............................................. 301
Problem (fault) ............................... 134
Engine oil
Additives ........................................ 308
Checking the oil level ..................... 250
Checking the oil level using the
dipstick .......................................... 250
Display message ............................ 212
Filling capacity ............................... 307
Notes about oil grades ................... 307
Notes on oil level/consumption ....250
Temperature (on-board computer) .195
Topping up ..................................... 250
Viscosity ........................................ 308
Environmental protection
Note ................................................ .20
Returning an end-of-life vehicle .......20
ESP ®
(Electronic Stability Pro-
gram) AMG menu (on-board computer) ...196
Deactivating/activating (AMG
vehicles) .......................................... 57
Deactivating/activating (notes;
except AMG vehicles) ......................56
Display message ............................ 200 Index
9 

H
Environmental note
When topping up the oil, take care not to spill
any. If oil enters the soil or waterways, it is
harmful to the environment.
! Only use engine oils and oil filters that
have been approved for vehicles with a
service system. You can obtain a list of the
engine oils and oil filters tested and
approved in accordance with the
Mercedes-Benz Specifications for Service
Products at any Mercedes-Benz Service
Centre.
Damage to the engine or exhaust system is
caused by the following:
R using engine oils and oil filters that have
not been specifically approved for the
service system
R changing the engine oil and oil filter after
missing the change interval required by
the service system
R using engine oil additives
! Do not add too much oil. Topping up with
too much engine oil can result in damage
to the engine or to the catalytic converter.
Have excess engine oil siphoned off. Example: engine oil cap
X
Turn cap :anti-clockwise and remove it.
X Top up the engine oil.
If the oil level is at or under the MIN mark
on the oil dipstick, add 0.5 to 1.0 litre of
engine oil. X
Replace cap :on the filler neck and turn
clockwise.
Make sure that the cap locks into place
securely.
X Chec kthe oil level again with the oil dip-
stick (Y page 250).
Further information on engine oil
(Y page 307). Checking and adding other service
products
Checking the coolant level G
WARNING
The cooling system is pressurised. Therefore,
only unscrew the cap once the engine has
cooled down. The coolant temperature gauge
must display less than 70 †.Otherwise, you
could be scalded if hot coolant escapes. X
Park the vehicle on a level surface.
Only check the coolant level if the vehicle
is on a level surface and the engine has
cooled down.
X Turn the key to position 2in the ignition
lock (Y page 127).
On vehicles with KEYLESS-GO, press the
Start/Stop button twice (Y page 127).
X Check the coolant temperature display in
the instrument cluster.
The coolant temperature must be below
70 †.
X Turn the key to position 0(Ypage 127) in
the ignition lock. Engine compartment
251Maintenance and care Z 

If only regular unleaded petrol with an
octane rating of 91 RON/82.5 MON or
loweri s 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 E10-compatible. You can
refuel your vehicle using E10 fuel.
SLK 350 BlueEFFICIENCY
! Only refuel using premium-grade 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
<10p pm) is used for refuelling, the odours
are reduced.
Additives
! Do not refuel with low grade fuel and do
not use fuel additives that have not been
tested and approved for Mercedes-Benz
vehicles. Otherwise the fuel system could
malfunction or be damaged.
One of the major problems with low-grade
fuel is the creation of carbon deposits during
the process of burning fuel. Mercedes-Benz
recommends that you use fuel brands that
have additives.
If you use fuels without these additives for a
longer period of time, there may be a build-up
of carbon deposits. These will form especially
on the inlet valves and in the combustion
chamber.
This could lead to engine running problems,
e.g.:
R longer engine warm-up phase
R uneven idle
R engine noise R
misfiring
R loss of power
In areas where petrol with the required addi-
tives is not available, carbon deposits can
build up. In this case, Mercedes-Benz recom-
mends the use of additives that have been
approved for Mercedes-Benz vehicles; see
http://bevo.mercedes-benz.com.
Consult a Mercedes-Benz Service Centre to
view a list of approved products. Observe the
instructions for use in the product descrip-
tion.
Do not mix other fuel additives with fuel. This
causes unnecessary costs and could damage
the engine.
Diesel (EN 590) Fuel grade
G
WARNING
Do not use petrol to refuel vehicles with a die-
sel engine. Do not mix diesel with petrol. This
would result in damage to the fuel system and
engine, which could lead to a vehicle fire.
! When refuelling, only use diesel fuel that
conform stothe 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 these fuels with diesel fuels and
do not use any special additives. Other-
wise, this can lead to damage to the engine.
This excludes flow improver; see "Low out-
side temperatures". Service products and capacities
305Technical data Z 

Additives
!
Do no tuse any additives with the engine
oil. This could damage the engine.
Engine oil viscosity Viscosity describes the flow characteristics
of a fluid. If an engine oil has a high viscosity
rating, it flows slowly; the lower the viscosity,
the faster it flows.
Engine oil selection is based on the respective
outside temperatures and in accordance with
the SAE classification (viscosity). The table
shows you which SAE classifications are to be
used. The low-temperature properties of
engine oils can be significantly impaired dur-
ing operation due to, for example, ageing or
soot and fuel accretion. It is therefore
strongly recommended to observe regularo
il
changes using an approved engine oil with the
appropriate SA Eclassification. Brake fluid
G
WARNING
Over a period of time, the brake fluid absorbs
moisture fro mthe air; This lowers its boiling
point.
If the boiling point of the brake fluid is too low,
vapour pockets may form in the brake system
when the brakes are applied hard (e.g. when
driving downhill). This impairs braking effi-
ciency. You should have the brake fluid renewed at
regular intervals. The brake fluid change inter-
vals can be found in the Service Booklet.
Only use brake fluid approved by Mercedes-
Benz.I nformation abou tapproved brake fluid
can be obtained at any qualified specialist
workshop or on the Internet at
http://bevo.mercedes-benz.com.
i Have the brake fluid regularly checked at
a qualified specialist workshop.
There is usually a notice in the engine com-
partment to remind you when the next
brake fluid change is due. Coolant
Important safety notes G
WARNING
Antifreeze is highly flammable. Fire, naked
flames and smoking are prohibited when han-
dling antifreeze.
If antifreeze comes into contact with hot
engine parts, it may ignite and you could burn
yourself. Do not spill any antifreeze on hot
engine parts.
! Only add coolant that has been premixed
with the desired antifreeze protection. You
could otherwise damage the engine.
Further information on coolants can be
found in the Mercedes-Benz Specifications
for Service Products, MB Specifications for
Service Products 310.1, e.g. on the Inter-
net at http://bevo.mercedes-benz.com.
Or contact a qualified specialist workshop.
! Always use a suitable coolant mixture,
even in countries where high temperatures
prevail.
Otherwise, the engine coolin gsystem is not
sufficiently protected from corrosion and
overheating.
! The engine cooling system is filled with
coolant, which mus tbe renewed after 308
Service products and capacitiesTechnical data