Also the Dealers is suppose to drain and refill the Exhaust fluid at every regular scheduled service inspection.
However the dealer do not do top up in between the inspection periods. that is the responsibility of the owner.

I recently had a scheduled inspection and they didn't do the flush and refill of the exhaust fluid. Actually they didn't even know what that was until I had to explain it them when I got the exhaust fluid low warning. They read up on it. The technology is too new...
Anyways, you should have a bottle of exhaust fluid in the trunk storage in case, ~$15.