Fill the MC reservior up to the very top and re-bleed the brakes on the circuit that went dry. I like to use a MitiVac for this, it's easier and will pull the air out better. You can still go dry, though.....

If you get dragging brakes after flushing, it's time for a caliper rebuild -- quite likely you disturbed all the crud lying on the bottom of the caliper bores and this can make the pistons stick.

At any rate, you are getting up to the age on that car where you need to do the calipers anyway, the rubber gets hard and stiff requardless of fluid changes or driving habits.

Peter

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1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!