How much coolant do I need to flush a 300D and 300SD radiator, guys? Thanks.

Just the radiator or the whole cooling system?

And this may be a semantic thing, but do you mean how much do you need to refill the system after a flush?

As for answers, sorry, I don't have my manual handy.

Sixto
91 300SE
87 300SDL
83 300SD

refill after a flush..thanks.

Buy two gallons. If you don't want to use the MB coolant get the pre-diluted Shell Rotella ELC from any parts store.

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Regards,
Aaron