How do I claim the 5-year warranty? Because it's a 5 year warranty on the Osram website:
https://www.osram.ch/ecat/LEDriving%20LG-LED%20feux%20diurnes-Voitures-Eclairage%20automotive/ch/fr/GPS01_1175836/PP_EUROPE_CH_eCat/ZMP_1167079/

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We advise you to contact Osram directly for information, we have 2 years on our side but it is possible that afterwards Osram will agree to process the guarantees themselves.

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Question about Osram LEDriving Light Guide

How do I claim the 5-year warranty? Because it's a 5 year warranty on the Osram website: https://www.osram.ch/ecat/LEDriving%20LG-LED%20feux%20diurnes-Voitures-Eclairage%20automotive/ch/fr/GPS01_1175836/PP_EUROPE_CH_eCat/ZMP_1167079/