You won't lose much. Maybe have some small plugs ready to limit loss. Just top off after hoses are replaced. Be careful removing the hoses from the rad nozzles. If they are tight use some PBlaster or similar and maybe a pencil torch on the nut.

While in there, it might be a good idea to have a look at the nuts that hold the transmission cooler nozzles in place (and provide a seal). I had one of those nuts split in half, all of it's own accord. Just noticed the coolant leaking. Discussed in link below

85 300D Radiator bottom nozzle leak

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Graham
85 300D,72 350SL, 98 E320, Outback 2.5