Ok, I drove my x35i M sport around some bumpy side streets (quite a few in Central NJ) and changing from Normal-->Sport-->Sport+ modes some dampening effects of the suspension (along with drive train changes) were definitely observed. I even went to dealership and spoke with my CA. He said that the dampening effects would be more perceptible during high speed corner turns (may be taking an exit on a highway). So folks taking performance center delivery would be able to easily verify this on the test track. Please confirm.
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