in my limited observations, p/s pump leaks:

>...not very common in M104: 6 cyl set-ups, perhaps a different story when viewed w/ the W140...

>...very common in latter M119: 8 cyl set-ups (just a matter of time)

options most likely include new high pressure hoses, "re-seal kit" and/or rebuilt p/s pump

hope this helps
-fad
'94 E320 Coupe
'94 E500