When you find a German fortification with Medipacks scattered on the ground or on tables, get that Medipack, use it (it will be the last pack in your inventory), and look towards the exact position of the Medipack you just used. You will not see another Medipack, but if you use your "Pick Up" command (Right Mouse Button is default), you will pick up another Medipack. You can do this indefinitely, as long as you used the previous pack. You can heal your entire squad using one Medipack. Also, you can drop Medipacks, pick them up, and use this same strategy.