I don't have them on my own car and having done a lot of miles with them and without I don't think it is a "night and day" that they are better. The matrix function is better at "shuttering" on the motorway, but on a other roads I prefer the adaptive xenon. I also disliked the Fresnel effect on the LED lights caused by the multiple beams from separate LEDs - but I can happily live with either until they fit lasers to the D5!!!!
Regarding the fault, each headlight is addressable as a subsystem of the Headlight Range controller (55), see a scan from a working 66 plate car below. I suspect this module would detail the problem on your car
Quote:
Address 55: Headlight Range (J745) Labels: 4H4-907-357-V2.clb
Part No SW: 4H4 907 357 E HW: 7P6 907 357 B
Component: MxB-ECU 001 0100
Revision: -------- Serial number: --------------
Coding: 02F6022022130200
Shop #: WSC 02391 785 00200
ASAM Dataset: EV_HeadlRegulAUDIMXBAU64X 005009
ROD: EV_HeadlRegulAUDIMXBAU64X_005_AU57.rod
VCID: 346CF5689FD598E21D-8060
Led Headlamp Powermodule Left:
Subsystem 1 - Part No SW: 7PP 941 472 K HW: 7PP 941 472 K Labels: 3D0-941-329.CLB
Component: LED LeiMo li. H07 7570
Coding: E00300
Led Headlamp Powermodule Right:
Subsystem 2 - Part No SW: 7PP 941 472 K HW: 7PP 941 472 K Labels: 3D0-941-329.CLB
Component: LED LeiMo re. H07 7570
Coding: E00300
Matrix Headlamp Powermodule 1 Left:
Subsystem 3 - Part No SW: 4H0 941 329 A HW: 4H0 941 329 A Labels: 3D0-941-329.CLB
Component: MxB LeiMo li. H03 0031
Coding: E00300
Matrix Headlamp Powermodule 1 Right:
Subsystem 4 - Part No SW: 4H0 941 329 A HW: 4H0 941 329 A Labels: 3D0-941-329.CLB
Component: MxB LeiMo re. H03 0031
Coding: E00300
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