What kind of gas/fuel do you use?
i however made the mistake by using a full service station i said premium but their premium is 91 with ultra being 93 didnt see much of a difference except the car was moving a bit slower and i think i put it in reverse and it didnt go back on its own(wasnt on a slope so i gave it a little gas) kind of how the car feels in "C" mode but i never take my car out of "S" so it wasnt that
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BTW, Union76/Unocal has 100 octane available in California at selected stations. Go to their website and you can locate one nearest you. Beware, it is expensive but when you gotta have the good stuff, you've got little choice. Toluene and other chemical additives work but there are added risks and are not as simple as pulling up to a pump.
Kaze:
Just a little FYI, since I'm of Pakistani descent and all my people do is run gas stations... Most independent gas stations use Phillips 66 and/or Diamond Shamrock (in the south-west) depending on what they get a better deal on.. Usually Phillips 66. So really, they're still name brand and not as independent as some think they are. Just thought I'd let u know
E55AMG99:
Out of curiousity, How much is 100 octane? Fifty-Cents more than supreme/premium/whatever it's called?
CLK Cadet:
Haha, I doubt that cuz it would probably freak up the used car market. But u never know... If they can offer diff cars in diff countries, they could even offer different tuning in differeint states






