I like your guide and it contains almost all the important things. I personally would have changed the order of some of the topics but since we do not have much material in German it is great to have a very detailed manual available at all.
There are a few spellings mistakes you will surely find when porting the guide to the wiki so I will not go into details on those. I will only comment on the contents on the guide where I feel they are wrong or could use more detail.
1) Spawn System could include the remaining possibility to spawn at the squad leader's position as well as the destructible rally points placed by the mapper. Lastly the spawn cars that the insurgents use should be mentioned (maybe also mention that you should not drive them anywhere else without good reason)
2) Kit requesting: Militia can request crewman and pilot kits (although the pilot is not of much use to them) Also you might want to mention where insurgents get their officer kit.
3) I *think* the pilot kit is not available at the apc but need to verify that. As for the 1 minute limitation for "fresh" vehicles. I understood it that the vehicle must be within 100m of a controlled flag
and not have been driven for more than 1 minute. Same for pilot kit.
4) The bleeding out effect starts at 40% (not 50%) as far as I know.
5) Grappling hook is also available for militia sniper kits.
6) The taxi mode for aircraft has the descrition that "Rollen" controls the left/right movement. It should read "Ruder"
7) I am not sure if the bunker and fire-base need multiple soldiers or an engineer but I think it needs more than just one soldier and a shovel. But here I could be wrong so
please correct me if needed.

The insurgency mode has only 10 ammo dumps on 64 player servers. Smaller servers have less dumps. Not sure if the new german spelling was changed for this word but you used "Depo" 2 times. So far I only knew "Depot".
OFF-TOPIC QUESTION: How does the healing mechanism for field dressings work? Do they heal a fixed amount or up to an fixed amount or somehow differently?