A4 Quattro Sedan L4-2.0L Turbo (CAEB) (2009)
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In area - A -, bring item - 2 - on rotary knob into alignment with marking on mirror (number 2 on rotary knob must face toward vehicle).
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Now align by sliding it sideways - arrows B - (VAS 6430) so that the laser beam is horizontally centered on the senor lens.