myfirstbenz

When I change my oil on my m103, it has a more typical hardshell oil filter like an american car, unlike most mercedes that have a filter element in a permanent housing. I am not a fan of this m103 oil filter, anyways, whenever I change my oil, I have a problem of the oil filter not draining all the way. The filter is inverted next to the steering box, and unlike on my 400E which drained perfectly so there was no mess, this doesn't. Has anyone else had this issue on their m103, is there a check valve that might need replacing, or is there a trick to this that I don't know about.