fuel additives MERCEDES-BENZ C-Class COUPE 2012 CL204 Owner's Manual

Emergency spare wheelStorage location ............................ 279
Emergency Tensioning Devices
Function ........................................... 51
Safety guidelines ............................. 37
Emissions purification
Service and warranty information ....20
Engine
Check Engine warning lamp ........... 234
Display message ............................ 213
Emergency starting ........................291
Engine number ............................... 326
Irregular running ............................ 129
Starting problems ..........................129
Starting the engine with the
SmartKey ....................................... 127
Starting with KEYLESS-GO .............127
Switching off .................................. 140
Engine electronics
Problem (malfunction) ...................129
Engine oil
Adding ........................................... 265
Additives ........................................ 330
Checking the oil level ..................... 265
Checking the oil level using the
dipstick .......................................... 265
Display message ............................ 215
Filling capacity ............................... 328
Notes about oil grades ................... 330
Notes on oil level/consumption ....265
Temperature (on-board computer) . 198
Viscosity ........................................ 330
ESP ®
(Electronic Stability
Program) AMG menu (on-board computer) ...198
Deactivating/activating (AMG
vehicles) .......................................... 60
Deactivating/activating (except
AMG vehicles) ................................ 192
Deactivating/activating (notes;
except AMG vehicles) ......................59
Display message ............................ 202
ETS .................................................. 59
Function/notes ................................ 59
Important safety information ...........59
Warning lamp ................................. 231
ETS (Electronic Traction System) ....... 59Exhaust check ................................... 143
Exhaust tail pipe (cleaning
instructions) ...................................... 273
Exterior lighting see Lights
Exterior mirrors
Adjusting ......................................... 95
Dipping (automatic) .........................96
Folding in/out (automatically) .........96
Folding in/out (electrically) .............95
Folding in when locking (on-board
computer) ...................................... 197
Out of position (troubleshooting) .....96
Setting ............................................. 96
Storing settings (memory
function) .......................................... 97
Storing the parking position ............. 96
F
Filler cap see Fuel filler flap
First-aid kit ......................................... 278
Flat tire Changing a wheel/mounting the
spare wheel ................................... 279
MOExtended run-flat system .........283
Preparing the vehicle .....................279
Raising the vehicle .........................281
Floormat ............................................. 261
Front fog lamps ................................. 102
Display message ............................ 211
Switching on/off ........................... 102
Front windshield
see Windshield
Fuel
Additives ........................................ 329
Consumption statistics ..................187
Displaying the current
consumption .................................. 187
Displaying the range ......................187
Driving tips .................................... 142
Fuel gauge ....................................... 29
Important safety notes ..................328
Premium-grade unleaded gasoline . 328
Problem (malfunction) ...................140
Refueling ........................................ 137
Index9

If there is no premium-grade unleaded
gasoline available and regular-grade
unleaded gasoline may be used; please
observe the following precautions:
R only fill the fuel tank to half full with
regular-grade unleaded gasoline and fill
the rest with premium-grade unleaded
gasoline as soon as possible.
R do not drive at the maximum speed.
R avoid sudden acceleration.
R if the vehicle is carrying a light load, e.g.
two passengers without luggage, do not
allow the engine to rev above
3,000 rpm.
R if the vehicle is fully loaded or is being
operated in mountainous terrain, do not
depress the accelerator pedal further
than Ô of the pedal travel.
Fuel requirements
Use only premium-grade unleaded gasoline.
The octane number should be at least 91.
Details can be found on the gas pump. The
octane number is the average value of the
Research Octane Number (RON) and the
Motor Octane Number (MON): (RON +
MON) / 2, also known as knock resistance.
Reformulated gasoline (RFG) and/or
unleaded gasoline with additives can be used.
However, the concentration of additives in
the fuel must be less than 10%, e.g.
R Ethanol
R TAME
R ETBE
R IPA
R TBA
For MTBE, the concentration should not
exceed 15%.
The concentration of methanol in gasoline
including other additives must not exceed 3%.
Using mixtures of methanol and ethanol is not
permitted. Gasohol, a mixture of 10% ethanol
and 90% unleaded gasoline, can be used.
All of these mix fuels must fulfill the fuel
requirements, e.g.:
R knock resistance
R boiling point
R vapor pressure
Additives in gasoline
One of the main problems of poor fuel quality
is the forming of deposits that are created
during the gasoline combustion process.
Mercedes-Benz recommends that you use
fuel brands that have the additives.
Deposits may form if you use fuels without
additives over a longer period of time. These
deposits are most likely to form on the inlet
valves and in the combustion chamber.
This could lead to engine problems, e.g.:
R longer engine warm-up phase
R uneven idle
R engine noise
R misfiring
R loss of power
Carbon deposits may form if the availability
of gasoline with relevant additives is
insufficient (in certain regions). In this case,
Mercedes-Benz recommends the use of
additives that have been approved for
Mercedes-Benz vehicles.
Consult an authorized Mercedes-Benz Center
or go to the Internet site
http://www.mbusa.com (USA only) for a list
of approved products. Comply with the
instructions for use on the product label.
Do not mix other fuel additives with fuel. This
causes unnecessary costs and could damage
the engine.
! Do not refuel with low-grade fuel and do
not use fuel additives that are not tested
and approved for Mercedes-Benz vehicles.
Damage to or malfunctions of the fuel
system may otherwise occur.
Service products and capacities329Technical dataZ

Engine oil
Please bear the following in mind
The engine oils are matched to the
performance of Mercedes-Benz engines and
service intervals. You should therefore only
use engine oils and oil filters that are
approved for vehicles with maintenance
systems.
For a list of approved engine oils and oil filters,
consult an authorized Mercedes-Benz
Center. Or visit http://www.mbusa.com
(USA only).
! Never use engine oil or an oil filter of a
specification other than is necessary to
fulfill the prescribed service intervals. Do
not change the engine oil or oil filter in
order to achieve longer replacement
intervals than those prescribed. You could
otherwise cause engine damage or damage
to the exhaust gas aftertreatment.
Follow the instructions in the service
interval display regarding the oil change.
Otherwise, you may damage the engine and
the exhaust gas aftertreatment.
The table shows which engine oils have been
approved for your vehicle.
ModelEngine
modelMB
ApprovalC 250271229.5C 350276C 63 AMG156229.5 27
i
MB approval is indicated on the oil
containers.
Additives
! Do not use any additives in 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,
this means that it is thick; a low viscosity
means that it is thin.
Select an engine oil with an SAE (viscosity)
classification suitable for the prevailing
outside temperatures. The following table
shows the correct SAE classification to be
used. The low-temperature characteristics of
engine oils can deteriorate significantly, e.g.
as a result of aging, soot and fuel deposits. It
is therefore strongly recommended that you
carry out regular oil changes using an
approved engine oil with the appropriate SAE
classification.
Refrigerant of the air-conditioning
system
The air-conditioning system is filled with
R134a refrigerant and a special PAG
lubricant.
! Never use refrigerant R 12 (CFC) or
mineral lubricants. Otherwise, you could
damage the air-conditioning system.
27 Restriction: only SAE 0W-40 or SAE 5W-40 engine oils may be used.330Service products and capacitiesTechnical data