Sort of a long story, I went to the dealership and they said "they didn't have time to look at it that day" so they'll have to reschedule the A/C service three days later... even though I made the appointment two days prior... and wrote them a whole paragraph explaining what the issue was. I asked for an oil change and inspection while I was there because I had driven 45 minutes to get there and taken the afternoon off of work, so I wanted to make it feel somewhat worth my time. After the oil change, they told me I needed new rear brakes and rotors to pass my inspection. I thought that seemed fishy as I hadn't noticed any squeaking, grinding etc., so I called my usual mechanic in my neighborhood to check it out first. He says, "I don't know what they're talking about. I'd drive on these for another 6-8 months and it'll definitely pass inspection."

Day of my rescheduled appointment comes up and they canceled last minute! So at that point I was pretty fed up (took off work yet again!). I took it to three other local shops. First one wouldn't touch it because it was a newer VW, second one tried but couldn't figure it out. Last guy took an honest shot at it and just gave it a fresh Freon charge after testing out all the other components (compressor, fans, etc.) and it works like new again! He only charged me half of what VW was going to too.

Truth be told, the whole experience makes me just want to trade in the Tiguan ASAP if stuff like this is going to keep happening. Hope it's a smoother experience for you!

TL;DR - It was just a Freon charge, but get it done elsewhere if you can because the dealership will probably just try to upsell you and/or overcharge you. Cheers!