Check the coolant level at the bottle every time you use the vehicle. The leak might get worse, and you might lose enough to overheat your engine before you know it and risk destroying it. Ideally, get the leak fixed ASAP, and avoid driving if at all possible until then.

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'06 X5 4.8is, TiAg/black, cold weather pkg., comfort seats
'07 750Li, TiAg/black, sport pkg.
'05 Ford F350 silver met./slate gray, Lariat, 6.0 PSD, CC, DRW, FX4