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I was wondering if the e10 (10% ethanol) unleaded petrol is ok to use on the c280 M104 engine? I have been putting 95RON unleaded petrol, but im led to believe that 91 unleaded petrol with the E10 is equivalent to 95RON because ethanol is a natural octane level booster:confused::confused::confused:
 

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2000 C230 Kompressor Special Edition
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In the USA most M104's run on 91 octane e10.

There may be regional differences with your engine. I would contact MB directly.
 
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