Unfortunately, I would recommend having the codes checked. If you know someone with vag-com, it will likely read the codes. Otherwise, you may have to bite the bullet and go to the dealer. The seatbelts on these cars have an explosive igniter so it is possible that wile the air bag did not deploy, the seat belt may have. It's a one shot deal. It may also be a crash sensor that went bad on impact. From a safety standpoint, get it checked out and if you're lucky, it may just need to be reset.
Good luck,
- Craig
Discount Volkswagen Parts