Hella Gen1 Bi-Xenon HID Projectors are widely used on 2000-2003 Germany made cars headlight assembly, like Audi A6, Golf, RS6 and Passat etc.
If the original projector of your headlight assembly is using this type, along with the time past, the reflect bowl of this projector will been aged and atomized. If you are good at DIY, you can buy a pair of same original projector directly, changed off the problem projector. Then the light of the car will be bright again. It is also a very economical and cheap method. (If you buy a pair of brand new headlight assembly, it will be very expensive.)
Of course some people buy this projector is for upgrade their headlight, because some cars are not come with original xenon headlight, if retrofit this projector into their car, the light output will be much more effective, and improve the safety of driving, it’s also a good choice.

E-Code RS6/A6 Bi-Xenon Projectors are well known for their superb light output. They utilize an E-Code cutoff shield (Z-Pattern) which creates a sharp, very colorful beam.

RS6/A6 Projectors are known for their superior output. These projectrors come in LHD configuration only. All RS6/A6 Projectors come with D2S bulb retainers and do not include D2S bulbs.

Projector Dimensions:
Max height = 3.5"
Max width = 4.4"
Max depth = 5.75"
Lens dia =3.0"