absoluTT A3

One of the driver's seat "leatherette" bolsters on my Audi A3 has started to develop a few cracks clustered in one spot. I have leather seats in my car, but I've come to learn that the side pieces are covered with this vinyl like leatherette.

Anyway, I'm out of warranty so I'll have to repair this myself. There's a ton of info and products on the market claiming to do this kind of repair, but I'd like to know from people here who can recommend a particular product that worked well. Thanks!