Steve Q

The part number should be on the back of the headlight. It should look similar to this "8V0941773C" 

Have you tried the method in the other thread? 

I think it's clipped on. You might find it's cheaper to replace the whole airbag from a used one from eBay. 

No you should be able to I think. I think it'll depend if it has canbus which was first introduced either in 2003 or 2004. My A6 is pre canbus so it's slightly harder due to the system not being as complex as later ones. But either way a competent mechanic should be able to diagnose it. 

Definitely the best option. As let's face it, the screens got to come out anyway. 

I had a towbar fitted to my ford Kuga daily by buzz towbars. They come to you to fit. Very knowledgeable and highly recommend. 

I'd recommend a diagnostic check to see if any fault codes flag up as it could be a
N issue with the sensor, wiring or module 

Looks a lovely A6. You could aways wrap it instead of painting it. 

I'd recommend getting a second opinion from another garage 

Wheel will physically fit but you'll need the clock spring from the donor car, air bag and wiring. 

The dealer should be able to tell you what service history it's got prior to buying even if they can't physically give it to you until you buy it. 

Most of the time the car will just be carting the electric motors about which are very heavy. Yi want economy I'd ha eBay diesel version personally. 

This video might help: 
 

My advice would be to take the wiring harness, ECU, injection pump and maybe instrument cluster from the donor car. As the imobiliser is linked to the ECU, cluster and pump. 
You could risk it and hope its compatible and/or get an auto electrician to wire up the harness. 
Also I've hidden your other thread as it's a duplicate. 

Yes definitely 

Yes it can be retrofitted but it's expensive and could void your warranty. You'd be better asking the dealer if it can be fitted now. 

I'd recommend a diagnostic check to see if any fault codes flag up 

Try eBay I'd say. 

Just an update I got hold of further information regarding the engine and gearbox codes thanks to Luke Voss, a member of the A6 c7 UK club. 

This is how you change it: 
2.5 Renewing bulb for dipped beam head‐
lights
Removing
– Switch off ignition and take out ignition key.
– Turn light switch to position “0”.
– Remove appropriate front wheel.
– Remove relevant front wheel housing liner ⇒ Rep. gr. 66 .
– Loosen locking bolt -1- a few turns.
– Release retaining tabs -arrows- and detach housing cover for
dipped beam headlights from headlight housing.
 
Audi A8 2003 ➤ Electrical system - Edition 08.2014
132 Rep. gr.94 - Lights, bulbs, switches - exterior
But you can take the bumper off and headlight out if you wish. Pictures for reference to show what it looks like behind the wig and bumper etc. 
 

Think it could be the rod that attached to the door handle. 

You're lucky. I'd still recommend a gearbox oil change to be on the safe side 

From looking online this spec is very rare. 
I'd estimate it's worth between 2-3k. 

Wowzers! 

You will find it is an offence for the driver or any passenger to not wear a seatbelt in any country in western Europe. On top of that the driver gets the fine for each passenger not wearing a belt. 
Not only that, I doubt you'll find a company that will deactivate the chime as I believe it's an offence to tamper with safety systems regarding seatbelts. 
Furthermore, if these systems are found to be tampered with then your MOT and insurance is void. 
I just can't understand why passengers wouldnt want to wear a seatbelt, the world as moved on since the 1950s/60s & 70s. 
I'd advise your passengers to watch videos on what happens when they don't wear a seatbelt. Needless to say, the one sat behind you can ultimately kill you as they hit the back of your seat!