Does not make sense.
As Kestas said:
Normally, without touching the pedal, with the bleeders open, gravity should have fluid flowing to the calipers within a few minutes.
Anyone who has disconnected a brake hose can tell you that the reservoir gets drained.
Bleeding is just to displace any residual air pockets.

That said, I've never run this particular system completely dry. Is there some special issue with bleeding the ABS pump, or something? Perhaps someone else can jump in here...


Tech tip: Better to leave the MC full of fluid while doing downstream brake work to minimize bleeding issues afterwards. To prevent the reservoir (and MC) from draining, wedge the brake pedal down. This closes the ports. You can improvise some sort of stick or bar, and slide the power seat to push it down.

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1986 300E 5-Speed 240k mi.