Leakin Problem

My 98 Ls back seat is wet somehow...i have taken out the seat and saw some water under it and the spondges on the seat is wet...and wen it rain and i drive water got in the trunk(where the emergency wheel is) had anyone ever experience this and kno what is the problem>???

Ive never had the problem myself but many people have. There is a plug of some sort that you can release all the water out of or something. Ill just let someone who knows it more than me answer the question.