The coolant draining plugs are different based-upon M119 block used.

Early M119's (w/allen/hex-head plugs):
(2) crush washers A-636-997-02-44
(2) Allen screw-plugs N-000908-014009

Late M119's (banjo type plug):
(2) crush washers 119-997-00-44
(2) screw-plugs 119-997-01-30

They are NOT interchangeable nor can they be retro-fitted.

I suggest everyone have at least one plug and (2) washers on-hand when draining. . .

Camshafts (intake & exhaust) and waterpumps are also diferrent based upon M119 engine serial number. FWIW, the "repair size 1" camshafts are NLA.

For posterity sake here are different brake caliper & rotors pn#s:

Upto B93094:
000 420 79 83 / 80 83 ATE cast-iron calipers
124 421 26 12 early rotors (even earlier was a 129 rotor)

From B93095:
001 420 00 83 / 01 83 600SL ATE cast-iron calipers
124 421 17 12 / 18 12 directional rotors

Sorry, no pn#s for the EARLY Brembo aluminum calipers.

:-) neil
1988 360TE AMG
1993 500E