Third row seat options for 98 ML 320

Hello all, I have an opportunity to purchase 2001 ML 320 third
row seats. Do any of you know if the 2001 seats will fit in my 98?
My ML already has the floor mounts for third row seats, if the
2001 seats will not fit is there any other option or vendor besides
MB that have them available for the 98 ML? Will I require add'l
mounting hardware or do the seats simply click in? Thank you all in advance.