1991 sl top problem

[aspag62]

I know this is old hat to some, But my 500 sl 1991 has a soft top problem. the top stops half way up,and it stops firm. This is the first I time tried to use it this year. During the winter I replaced battery, replaced both window motors. Every thing on this car is in good condition owned it since new. The hard top released with out a problem went back on with no problem fuses are find. it did go up but only 1/2 way. Also roll bar works find
I need help.
Thanks Angelo