There is nothing for it but to remove the door card and see what has happened inside the door .
The rear windows on W201 and W124 models are similar , the lifter is operated via a drive cord and pulley system , acting on a point halfway along the bottom edge of the glass ; the two vertical sides of the glass run in channels and it is likely one or the other has come out .
The problem should be evident once you open the door up .
If you are not sure , the Haynes manual for the W201 series , ( Book no 0928 , available in most branches of Halfords for something like £15) shows how to dismantle the trim in step by step guides with pictures .
The rear windows on W201 and W124 models are similar , the lifter is operated via a drive cord and pulley system , acting on a point halfway along the bottom edge of the glass ; the two vertical sides of the glass run in channels and it is likely one or the other has come out .
The problem should be evident once you open the door up .
If you are not sure , the Haynes manual for the W201 series , ( Book no 0928 , available in most branches of Halfords for something like £15) shows how to dismantle the trim in step by step guides with pictures .
