One option you might find useful would be the smartphone interface. This permits alternative music streaming and also different Sat-Nav options.
Audi changed the packs, and the extras included with them a few times over the years. Items such as the Hill hold, Electric seats, rear camera and advance key popped in and out of the comfort and sound pack. On 2017 - 19 models the electric seats were not included in the pack.
From the first 2018 model year brochure (07/17) the options below were available.
Ceramic brakes - ÂŁ4,695
Brake callipers in red with RS - ÂŁ325
Engine cover with carbon accents - ÂŁ650
RS Sport suspension with Audi Magnetic Ride ('Comfort', 'Dynamic' and 'Auto') - ÂŁ995
RS Sport exhaust system, Oval-shaped, high-gloss black dual-exhaust pipes - ÂŁ1,000
Top speed restriction increase to 174mph* - ÂŁ1,600
Matrix LED headlights with LED rear lights - ÂŁ945
Matrix OLED rear lights - ÂŁ800
High-beam assist - ÂŁ160
Matt Aluminium Styling Pack -ÂŁ800
High-gloss Black Styling Pack -ÂŁ800
Privacy glass - ÂŁ450
Gloss carbon door mirrors -ÂŁ1,250
Door mirrors (folding with auto-dimming function) - ÂŁ280
Carbon Inlays - ÂŁ800
Electrically adjustable front seats - ÂŁ800
RS Red Design Pack - ÂŁ895
RS Grey Design Pack - ÂŁ895
Storage Pack - ÂŁ175
Head-level heating (Roadster only) - ÂŁ495
Comfort and Sound Pack (Rear Camera, Hill Hold, Advanced Key, B&O) - ÂŁ1295
Bang & Olufsen Sound System - ÂŁ625
Audi Phone Box with wireless charging - ÂŁ325
Audi Smartphone Interface - ÂŁ250
Advanced key - ÂŁ455
Hill-hold assist - ÂŁ90
Rear-view camera - ÂŁ550
Audi Side Assist - ÂŁ595
Camera-based traffic sign recognition - ÂŁ160
By mid 2018 there were small changes. The hill hold became standard on all cars and the Audi Sport Pack was added @ ÂŁ1700.
RS Sport suspension with Audi Magnetic Ride
RS Sport exhaust system
Tyre Pressure Monitoring System.
This pack was great value as it was ÂŁ200 cheaper than taking the exhaust and suspension separately and included the tyre pressure and temperature system. Oddly there are so many second hand cars out there, from this build, that have the Suspension and exhaust but not the fancy TPMS.
The next change was the facelift 2019 and the introduction of the Base, Sport and then Vorsprung editions. This is when the TTRS options became very messy.