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Old 12-22-2007, 05:41 PM   #11 (permalink)
Yal
BenzWorld Elite
 
Date registered: Sep 2004
Location: LI, New York
Posts: 1,986
Actually 91 octane USA is what they are built for. This octane rating translates to 95 octane in Europe which the cars are built for. If you put something lower than 91 thats when the knock sensors kick in.
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