2009 TDI, Approaching 120k miles - Buyback or Keep

2009 JSW TDI is approaching 120k miles. A/C is not working, door handle on passenger side doesn't work, and I have the big timing belt replacement coming up. Interested in 2015 GSW TDI, but current offering is laughable ($5k off MSRP, 0% APR 72 mos.).

I reallllly don't want to stop driving diesel, but I'm just beside myself about what to do. I highly doubt they are working hard to find a fix for the Gen 2 Diesels. Thoughts?

Edit: Thanks for the feedback, everyone. Going to stick with my plan of selling it back.