The issue you are having is actually not that uncommon on German vehicles like your 2020 Audi Q8 as you have read.
The adapter like the # C73NR, or using a domestic vehicle with a functioning 7-way connector can be required to pair the Tekonsha Prodigy RF Wireless Trailer Brake Controller # TK94FR on some German vehicles.
The reason the adapter helps is it puts extra load on the system and is more likely to allow the Prodigy RF # TK94FR to recognize it for pairing.
Either using # C73NR... view full answer...
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