I have noticed that under the Vehicle Market in the fire station it lists the Mobile Command Vehicle as being needed once a player has 13 fire stations. I have 12 fire stations and I am now getting missions that wont complete without a MCV. Currently I have a high rise fire that is stuck half way due to not having a MCV, and earlier I had to finish an unknown tanker spill with coins as it would not finish either.
I do now have people in the MCV class and I'm working on buying the truck, however the staff in the class wont be done until Saturday; furthermore according to the information in the vehicle market I shouldn't need the vehicle yet anyways.