When repairing damaged Mechs and vehicles, keep in mind that there is a limited amount of repair resources. When you repair, make sure you make them responsibly. Do not repair all your slightly damaged Mechs, use up all the repair resources, then try and repair your heavily damaged Mech. This applies for all repair systems: the Repair Truck and the Mech Repair Bays. Note that vehicles can only be repaired by Repair Trucks, and cannot be repaired in Mech Repair Bays. Mechs can be repaired with either source.