Velour is nice on those super cold or super hot days. It can also be softer than leather (Have you ever sat in a Mk3 VW with leather? It's like sitting on beef jerky!) I found it a lot harder to keep clean though. The extra grip it gives you in the seat is nice for those of us who take corners at more then 5 mph

That said I did swap leather into my Jetta and specifically sought it out when I was shopping for my Benz.

-Jason

__________________
1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket

Tesla Model 3. 205,000 miles. Been to 48 states!
Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels.
2014 Cadillac ELR
2013 Fiat 500E.