My 2015 535d (103,000 miles) had the low coolant light come on a few weeks ago. Yesterday I checked and the coolant was low again. I don't think there's coolant in the oil (not milky white) and there's no coolant on my garage floor.

There is an open recall on the EGR cooler and this may be the problem but Dealers are unable to repair due to lack of parts from BMW.

Any thoughts on where the coolant may be going? Is the vehicle safe to drive until a dealer can check it out? I can't get in into the local Dealer for a check-up for a month!

Thanks!