Put some kms on SW2 but it is a shame the A/C quit few years ago. In 2020 compressor failure/leak was diagnosed but a fix would exceed car value then, sure unless a 21 years old car price raise as the used market did lately... no, not really
Could always try a can RedTek with sealant if the issue is a leaky compressor. My T/A had a slightly leaking compressor, when I got it, so I charged it with RedTek and used at least one can of the sealant. AC blew cold after that for another 4-years until finally the compressor totally died and I swapped in a good used one I had (plus new dryer, orifice tube, etc).
No a/c in the Audi... Hoping for such a cheap fix with my indie but of course it may be some obscure $1973.42 fgc part...
This is the 2017 A3 e-tron that doesn't have AC? WTF? It's practically a new car...
5 y.o. next month and just crested 31,000 km. CEL came on early last week, and when the heatwave struck I noticed there's no a/c (HVAC works, but no cold air being put out). Then yesterday the trip computer (with odometer and everything) went blank. Stayed blank after shutting off / re-starting the car. Later at night it came back on, all the info is intact. From the one forum dedicated to this rare car, multiple systems not working may be a sign of the 12V battery going bad. That's a $1k job at the dealer. NAPA has a battery for $250. Will try to get the code read by my indy this week!
Yeah, that sounds like it's likely an electronic issue (battery) than an AC system problem, hopefully.
In either case, my advice to use RedTek/Sealant I'd be comfortable on an 20 year old Saturn, or my 35 year old T/A...I would not use that advice on a 5 year old Audi.
My AC in the DTS was acting weird a couple weeks ago...blowing ICE cold (literally) to a point where the evaporator would freeze over and block the air flow. In a 'modern' system, with a strange issue like that, I wasn't going to waste my time playing with it without the right equipment. Took it to The Hire's shop, once on the proper machine it was simply a low feon situation (I guess after 15 years that's fair), they topped it up to the correct pressure and it's been good since.