coolant capacity for W123 300D non-turbo (617.912 engine)?

Can someone with access to the Mercedes manuals kindly post the total coolant capacity for the non-turbo 300D engine (617.912). This is for a 1980 300TD. Also the correct coolant/water ratio. The best antifreeze
to use is still Zerex G-05, right?
Thanks in advance!
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11.7 quarts. 50/50 ratio is ideal.
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Although 50/50 is the usual recommended mixture, it's best to read the coolant bottle for mixing instructions...
Nowadays some coolants require different mixture or no water at all.
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