I noticed on the 93 the coolant air bleed to the overflow/expansion tank is on the block as part of the thermostat housing. cast aluminum. solid improvement from the 617's plastic nipple on the radiator that always breaks.
I just got the 95 in my shop, and am surprised that MB put the vent line back on the radiator... why?
it is higher on the coolant system, so I guess I see an advantage of burping any air out of the system, but plastic is SOOOO weak! and so easy to damage...
of course, the 95 completed a tripple axle on the interstate, and did not break the vent line... so they may have made it quite durable, I just don't know what to think of it.

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!