Mondeo MK4 Titanium X Sport - Flickering Xenon Headlights

Headlights flicker at approx. 9 seconds. Ballasts or bubs (D1S bulbs)?
Update: Changed the bulbs in April 2021 and it has been fine since.

Видео Mondeo MK4 Titanium X Sport - Flickering Xenon Headlights канала Dave