The main reason I was trying to make sure I have an accurate number is in the event that I briefly cleanse the system with 100% water. Knowing the correct capacity would be helpful in making sure that, at the end of the process, I have a 50/50 mix of coolant and water.

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14 E250 Bluetec 4Matic "Sinclair", Palladium Silver on Black, 159k miles
06 E320 CDI "Rutherford", Black on Tan, 179k mi, Stage 1 tune, tuned TCU
91 300D "Otis", Smoke Silver on Tan, 145k mi, wastegate conversion, ALDA delete

19 Honda CR-V EX 77k mi
Fourteen other MB's owned and sold
1961 Very Tolerant Wife