A4 Seat and Seat Belt problem
 

Hi

This is a very long shot but here I go

I have an Audi A4 Quattro Estate and was lending my friend a table for a BBQ, put the back seats down, took the table to then find I could not put the seat back up. Seems the seat belt in the midle has locked and I cannot seem to get the damn thing back upright

Has anyone had this problem with their Audi and how did you fix it please

Thanks