Anthony,

'Just looked at door "holders/keepers" on friend's 92 400E (W124). His are basically samee as my 123 & 126. Difference is in the weatherstrip. 123/126 weatherstrip is one piece that "splits" & has a part that attaches to door on each side (inside and outside) of the bar. 124 weatherstrip does not split at bar - just continues on door on outside of bar; additionally on the 124, a small piece of rubber (weatherstrip) is slipped (stretched) over hinge end and hinge pin at chassis end (front end) of the bar. Bar, pin, etc., same as 123/126.