All of a sudden, the driver side seatbelt is locked. I can disconnect it from the automatic part, it will retract fully but then I cannot pull it back it as it is locked. However, if I pull a bit, give it slack, then pull a bit more I can eventually get enough slack to cover my body--but then I cant move because the belt is still locked as if I am slamming on the brake!!! Any suggestions before I drop it off at the dealer? Thank you.