For your 2019 Audi Q8, you can use the:
-Tekonsha ZCI Circuit Protected Vehicle Wiring Harness with Installation Kit # 119250KIT.
This wiring kit will work great with your vehicle and will provide your trailer with the necessary lights for towing.
If you're also wanting to tow a trailer with electric brakes, you will need to also add a 7-way for your 2018 Audi Q8, in which you can use # ETBC7. view full answer...
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