hello, according to my smart dealer, the top is of the same high quality MBenz convert tops. It doesn't need to treated if you do not want, and will not change the tops health to begin with. The tops are designed NOT to bead so there is nothing wrong with your top if it doesn't 'bead'. The material is designed to keep water out so long as that is happening and you keep it as clean as you can, your all good.
Just fyi..