Have a 1987 230 te and removed the wiper motor etc, to get access to the wiper head to lubricate. On the back of the head I can see, 5 screws 2 large and 3 smaller at the bottom of the head, have removed 3 smaller ones, and the metal cover has become looser at the bottom of the wiper head. But the cover is stjll held tight at the top of the head. Have not removed the 2 larger screws as thought they might have something to do with internals. The linkages are still connected to the centre of the head (which is next step). Have tried to slide the cover with no success. If somebody knows the next step would be good.