The d2s is an hid lighting. It is an arc source type of lighting available as an upgrade feature in new vehicles from dealers. The white output, and the reflector design system, tend to give it a bluish/purple look. When replacing the xenon bulb, both must be done at the same time. The xenon bulbs change color with usage & time, hence the reason why one bulb will appear yellow & the other 'blue'.
Known as: bulb 5 w position light for additional headlamp 987.631.081/082.02/03/04 / bulb 5 w position light for additional headlamp 997.631.081/082.03/04/05 / bulb 5 w position light for direction indicator light 997.631.091/092.03
Known as: relay f >>92hn4 50198 / relay electric drive / relay for convertible top control / relay blower engine compartment / relay pump / relay switch-off