"Queue Priority
We generally recommend you use the settings interface over modifying the configuration file by hand.
There's one really important thing you should know about this setting: it uses the first vehicle it can find a match with the specified text with. This sounds more complex than it really is: if you have a "PzKpfw VI Tiger" and a "PzKpfw IV" in your garage, and you enter "PzKpfw" as your first priority, you can't tell which one it'll queue with - because both the Tiger and the IV contain the text "PzKpfw". Be as specific as you can be on this, generally typing the full name of the tank as shown in the garage is a good idea."