Problem with my soft top going up. on 1997 Mercedes-Benz SL320

I have an SL 320 and just removed the hardtop for the Spring. When I went to put up the soft top it would only raise about 1/3 to half way up and stop. What do I need to do to troubleshoot this?

You really can't do much without the OE diagnostic computer. I'd suggest to take it to a good MB specialty shop.
The fluid level might be low in the hydraulic system, but better to leave this for a shop also.