there was a post about the head gasket problem being fixed in the 97 model year. you can do a search and maybe wait for someone to reply to this thread to verify it. as far as MB is concerned they did not have a head gasket problem in the M104 engine. they just developed a better head gasket (see Steve Brotherton's [aka stevebfl] dissertation on the problem and the new design - a most excellent piece). re: 722.6 tranny - the concensus seems to be not to follow MB's guideline as regards ATF fluid service intervals - change it early!
1993 300e-2.8 - gone now <sigh>
"Do not adjust your mind, it's reality that's malfunctioning"