Thread: RaceChip Ultimate F15 X5 35i Installation DIY
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      01-22-2015, 09:03 PM   #22
42pilot
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Drives: 2014 X5 35d MSport
Join Date: May 2014
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Originally Posted by PTY_M View Post
What about the statement that the S1 does not need to be adjusted for petrol engines??
Do you know what the S1 and S2 control?
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