What kind of data??
Tire sizes, pressures, etc are back side of fuel door.
Build options/etc is a sticker under the trunk carpet (and random loose copies under/in various other places) on all Jettas that I've owned.
I believe the country of origin, date of manufacture and gross vehicle weight/etc. sticker is next to driver door jamb latch. At least, again, in my Jettas. Perhaps if no such stickers there has been body work/repairs?