Adding rear fog light lamp to 2018
02-16-2018, 07:21 PM
#11
AudiWorld Member
It Depends on the switch and the wiring. The coding would be the easy part. It may just be the switch or it may be the switch and the wiring to the ECM. I don’t think this has been attempted before. We need some wiring diagrams to make sure.
You can get the instructions for removing the headlight switch fand probably the wiring diagrams here :
https://erwin.audiusa.com/erwin/showSearch.do
Also you can compare the tail light assembly and the wiring differences between MY 17 and 18 to make sure the lamps and wiring are still there.
02-17-2018, 11:06 PM
#12
The taillight assembly and wiring are different. The two wires to the comfort module in the trunk are missing, and the lights physically do not have the LEDs inside. You'd need to add the two wires and then parameterize the control module. Just adding the wires and switch will not enable them.
02-18-2018, 08:15 AM
#14
AudiWorld Member
We get a lot of dense fog down here in FL and I use my rear fog lamp all the time when the fog is heavy...very happy I have it!
Last edited by securityguy; 02-18-2018 at 10:11 AM.
02-18-2018, 09:26 AM
#15
AudiWorld Member
I dont' have a definitive answer, but my belief is that if Audi removed it to cut costs, they removed everything that was in the car only to support it. So, along with the switch, the wiring as well.
02-18-2018, 09:56 AM
#16
AudiWorld Senior Member
Thread Starter
The taillight assembly and wiring are different. The two wires to the comfort module in the trunk are missing, and the lights physically do not have the LEDs inside. You'd need to add the two wires and then parameterize the control module. Just adding the wires and switch will not enable them.
02-18-2018, 09:59 AM
#17
02-18-2018, 05:48 PM
#18
AudiWorld Member
I don’t agree. Simple example, The camera behind the rear view mirror. All US cars have it but active lane assist and high beam assist are only active in prestige models or cars with driver assistant package. Another recent move by Audi making S line standard across the board for all US cars to simplify the production even more. Altering taillights/wiring after only one model year would add complication to the production line and add to the cost.
02-18-2018, 05:58 PM
#19
I don’t agree. Simple example, The camera behind the rear view mirror. All US cars have it but active lane assist and high beam assist are only active in prestige models or cars with driver assistant package. Another recent move by Audi making S line standard across the board for all US cars to simplify the production even more. Altering taillights/wiring after only one model year would add complication to the production line and add to the cost.
The taillights were also slightly darkened (due to market preference) and the lack of a legal requirement in this market meant that rear fogs were dropped. So two changes, not just one. The lack of rear fogs is becoming common amongst many German OEMs, including BMW.
To my point above, if it's not needed, it's not there.
02-18-2018, 07:02 PM
#20
AudiWorld Member
You're more than welcome to disagree. However, I worked for the company and ran the team that built most of the tech you're now enjoying. This type of thing happens frequently because some changes aren't necessarily pegged to cost constraints/reduction. For example, on A4/A5, customer feedback saw one of the two USB ports relocated to make it more convenient to access. This required engineering two new parts and modifications to the harness, plus updates to owner's literature and other content, including technician training. There isn't a cost savings here.
The taillights were also slightly darkened (due to market preference) and the lack of a legal requirement in this market meant that rear fogs were dropped. So two changes, not just one. The lack of rear fogs is becoming common amongst many German OEMs, including BMW.
The taillights were also slightly darkened (due to market preference) and the lack of a legal requirement in this market meant that rear fogs were dropped. So two changes, not just one. The lack of rear fogs is becoming common amongst many German OEMs, including BMW.
How does this explain the Driver assistant Camera being present on all US models while the feature is only available in prestige cars?
Last edited by marz1; 02-18-2018 at 07:09 PM.