If you have carpets fitted check that they have not jammed in the runners. I have had this problem at least three times, once resulting in the release mechanism breaking.
I bought part no 9464802980 for my Fiat Ulysse Eleganza 2.0 JTD as the cable in middle seat in middle row had broken. I can't fix either end to the bottom lever as it does not seem to fit ; any suggestions please would be much appreciated.