I recently checked fluid levels on my 1994 E320 wagon and discovered that the brake fluid was very low, although there were no performance issues. After adding an entire can of fluid (750 ml, this was more than I had ever added to any car), the reservoir was in the safe zone. After a brief drive around town, I returned home only to find a few hours later that the fluid had leaked all over the floor of the garage and the reservoir was almost empty. The car is currently spending the night at the dealership awaiting diagnosis. Should I fear anything worse than a leaking reservoir, hoses, or fittings?