I’ve finally come around to consolidating the information the facelift rear isn’t hard at all. Its rather very easy. I had issues with the lighting only to find out that i was using EU light with a US comfort module and coding. It doesn’t work the instructions currently found at Motortalk.de are for EU cars. I translated those and transposed them for the US versions of the car. I’ll provide pictures. I ordered all my parts ironically from a junkyard. Bumper, Trunk with inner light and comfort module included, and got the outside lights from Amazon. I reused all screws from my car. Ill draw up a diagram with the information from both the EU and US wiring diagrams later. You’ll have to connect the wires from the inner taillight. If you’re able to source the trunk lid from a junkyard make sure you get a S-line or S6 bumper as it has a natural ridge line if you have an S6. Also the A6 vs S-line bumpers are different and the diffuser connections are different as well.
Here’s the original link in German w pics:
http://www.motor-talk.de/blogs/a6-4f-limo-heckfacelift-umbau-von-a-z/a6-4f-limo-heckfacelift-umbau-von-a-z-t3242698.html
I combined those with these instructions from OEMplus to make the install go well with the added innerlights:
http://www.oemplus.com/DIY/A8_4E_LED_Tails.pdf
Summary:
- Tailgate (s-line = S6)
- Diffuser (s6 or s-line)
- Screen Cover (only for s-line)
- Facelift shock (you can buy only as sline)
- Rear interior trim
- Tail Lights 2 Outdoor
- 2 inner taillights
- Harness of inner taillights or
- Plethora of different pins with wires. (This is to create your own hardness)
- Backup Camera and Harness ( If you dont already have one)
- Comfort Module
Part Numbers for Install
- Backup
5A big pin 4 - Comfort Module
4F0907289 with at least N or M Index - Limo Rear bumper:
4F5 807 303 F = for cars without PDC
4F5 807 303 G = for cars with PDC - Decorative strip for Limo:
4F5 807 443 A 2ZZ = chrome
4F5 807 443 D = GRU for Black Line Package - Diffuser S6 FL:
4F0 807 521 = for vehicles without towbar (for cars with AHK please adjust) - Hood for diffuser S6 in aluminum matt:
4F0 807 791 - Diffuser S-Line fits both variants:
4F0 807 521 C = without AHK (so that the grid recess)
4F0 807 521 b = with AHK - Grille insert diffuser S-Line:
4F0 807 833 - Trunk lid S-Line:
4F5 827 023 S or - Trunk lid normal:
4F5 827 023 AB, which I have unfortunately. - Covering trunk lid:
4F5 867 975 M or L - LED Tail Lights:
4F5 945 095 J = left outside
4F5 945 096 J = right outside
4F5 945 093 E = left inside
4F5 945 094 E = right inside - Rear lights outside plug:
8D0973734 x2 - Rear lights inside connector:
3B0972722 x2 - Rear lights inside Pins:
000979021E x4, as the line reaches a 0.35, and does not have to be 0.5 or even 1.0.
You’ll have to adjust the trunk so that the lights line up mine are off by like .5 cm, not much. All measurements are in metric. Good Luck! It was a lot easier to do once i understood the german translation and got the RIGHT lights. On that note if anyone needs the EU lights let me know! CHEERs
