Hello,
Thanks for reaching out on this topic! There is a slight difference in how they are categorized and I am happy to explain the subtle differences in how they are categorized. It was initially put forth for the Summer of Audi sales event as a unique trim offering with the "Premium" trim features plus the "Technology Value Package" (which is what it would display as in the window sticker). The Tech Value Package includes the Convenience package as well as the Navigation/Telematics package. In this example, you could purchase a 2018 Q5 with the Tech Premium package (included with Convenience & Nav) and also add on the Premium Plus package for a reduced price compared to the standard "Premium Plus" pricing. As your sales associate mentioned though, this was only a limited time offering.
For the standard Q5, it's more traditional as you would expect with the Premium/Premium Plus/Prestige system. The convenience package is standard with Premium Plus but Navigation is optional on Premium Plus and standard on Prestige. Hopefully this all makes sense, but please let me know if you have any questions on the differences.
Best regards,
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