Mercedes-Benz CLK-Class Owner's Manual page 245

Operation
Refuelling
CLK 200 CGI, CLK 55 AMG:
Super unleaded sulphur-free petrol with
a minimum octane rating of 98 RON/
88 MON.
i
As a very temporary measure, you may
also use premium unleaded petrol, 95 RON/
85 MON. This may reduce power and increase
petrol consumption. Avoid the use of full throttle.
!
The following may lead to increased wear or
engine damage:
The use of petrol which does not comply with
EN 228
The use of fuel additives
The use of fuels and/or fuel additives which
have not been approved may result in limitation
of warranty rights.
242
Leaded petrol
You may fill up with leaded petrol in coun-
tries where unleaded petrol is not availa-
ble. This shortens the interval for replacing
spark plugs to 20,000 km.
Consult a Mercedes-Benz Service
Centre before using leaded petrol.
!
Leaded petrol damages the catalytic con-
verter and the Lambda probe.
If you exceed the interval for replacing the spark
plugs, this may cause increased wear and engine
damage.
You may obtain further information from any
Mercedes-Benz Service Centre.
Diesel (EN 590)
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You will generally find information about the
diesel grade on the filling pump. If not, ask the
filling station attendant.
We recommend having the engine oil
changed every 7,500 km in countries
where only diesel fuel with a sulphur con-
tent exceeding 0.5 percent by weight is
available.
!
Use of the following may lead to increased
wear or engine damage:
Diesel which does not comply with EN 590
Marine diesel fuel
Heating oil
Vegetable oil methyl ester (VOME)
Fuel additives ("biodiesel", FAME fuels)
The use of fuels and/or fuel additives which
have not been approved may result in limitation
of warranty rights.