To remove that film advance/cocking lever you need a special tool with two tiny, fitting pins. You can either get such from supply companies as "Microtools" or make such yourself. Some people juse a divider caliper. I would not do so.
If you are really lucky a piece of rubber pressed on that screw would work too.
Keep in mind what has been said above on the possibility of a left-hand thread.
Here is a complete description of how to remove the body cap of a 35 SL E:
On the net you can buy a complete repair manual.
I would not begin taking off the cap without knowing in advance what to do next though.
Last edited by AgX; 10-18-2013 at 04:41 AM. Click to view previous post history.