"Optional xenon" refers to a feature or upgrade that is available for something, like a car's headlights, but is not automatically included.
Full definition
Infiniti L - shaped headlights and fog lights with
optional xenon headlights with Adaptive Front lighting System (AFS), thin LED taillights
At the front of the vehicle there is a distinctive stone gray single - frame grille and flat headlights
with optional xenon plus headlights and LED daytime running lights.
Audi
offers optional xenon plus headlights with LED daytime running lights, with LED headlights to follow somewhat later.
Optional Xenon Adaptive Headlamps Automatically leveled and steered in response to steering angle, vehicle speed and turning rate, they light more of the road through curves and dips and are encircled by luminous rings that serve as parking and (if desired) daytime running lights.
New black surrounds for
the optional xenon headlights make for an even more imposing front - end design.
The headlights are reminiscent of those on the A4 and A5, and
the optional xenon headlamps add a C - shaped collection of LED running lights.
A closer look reveals thoughtful design details like LED taillights, a power rear tailgate and
optional xenon plus headlights that aim in sync with steering input, helping you see around curves and corners.
Details include LED taillights, a power rear tailgate and
optional xenon plus headlights that aim in sync with steering input, helping you see around curves and corners.
The characteristic daytime driving lights generated by LED light rings in conjunction with
the optional xenon headlights, as well as the L - shaped rear lights with their homogeneous rows of lights, again contribute to that very special look so characteristic of BMW.
When equipped with
the optional Xenon headlights, the Corona Rings and daytime running lights are illuminated by bright white LEDs.
The Adaptive Headlight function incorporated in
the optional xenon headlights adjusts the illumination depending on the vehicle's speed, steering angle and yaw rate.
With
the optional xenon plus headlights, the LED daytime running lights form a narrow, homogenous clasp framing the headlight.
If
the optional Xenon headlights are specified, the vehicle is also equipped with Adaptive Headlights including cornering light, variable headlight distribution and adaptive headlight range control for city and highway driving.