Upgrade from a manual slide-only sun roof to.....? My car is equipped with the manual slide-only sun roof - and boy is it manual!! MB didn't even have the courtesy to install some sort of mechanic workings to help open it up, I have to use both arms and almost crawl into the backseat to drag it fully open.. What I would like to do is to upgrade to the later style slide and lift sun roof - complete assemblies can be had fairly cheap, so the cost is not a concern to me. What I am wondering is whether it is actually possible?? Had anyone here ever attempted something similar, or have knowledge on whether the roof-plates are different in any way? Judging from pictures of both assemblies I see no obvious differences - here, have a go: Manual: Electric: Any help at all is appreciated - even the part numbers for the roof-plate if there are several (besides "with" and "without" sunroof of course )! Thanks!