Specific adapter for converting bi-xenon headlights to LED headlights with Matrix Beam for Audi TT 8S this conversion requires the replacement of the automatic headlight range adjustment control unit (part number 42731-P) the full headlight function is only available after automatic headlight range adjustment only one set is required to connect both headlights high-quality adaptation in original equipment quality scope of delivery: adapter note: coding must be carried out using a coding dongle / article no.: 42733) for the matrix function, a front camera must be installed (PR-No.: QK1) for vehicles with LED headlights (PR-No.: 8IT) use article 45939 + dongle 42733-1 headlight calibration must be carried out according to the manufacturer's specifications