Your part # is: 000 989 10 25 (500 grams)

Mixed @ a strength of 100grams per liter of H2O.

Heater controls set to FULL HOT

Run,at operating temperature @ IDLE,(you'll have to let it warm up, AT IDLE) 5 minutes.

Flush,Flush,Flush ,fill with clean ,clear water and run up to Operating Temp...
then Flush ,Flush,Flush.(You don't want to leave ANY CAF in the system)

Use Block Drain Plug(s) as well as Radiator drain plug.

AT one point the FSM wants you to remove a bolt on the horizontal surface of the head to allow proper Refilling of fresh coolant mixture ???? "Burping"

[I'd Await ADVICE from EXPERTS on the advisability of that procedure AND
the Location of said "Bleed" Bolt...The FSM HAS any number of incorrect
pictures detailing instructions that would result in Engine Fatality if followed.]

I'd fill New coolant mixture with the chassis (Front) up on ramps...Mixture
poured into both the top radiator hose ends (Not simultaneously) to fill the
Radiator and then the Block.

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'84 300SD sold
124.128