Enjoy the TSA Pre benefits when you fly from the participating airports and checkpoints! As much as it ought to be the standard procedure (like it still is for most EU flights), it's the sole remaining remnant of pre-9/11 security screening and feels quite sane if you forget that it's the exception.
I'm guessing you also signed up for Global Entry to get this, after getting cleared by the German Federal Police? If so, it should make your arrivals in the US a lot easier by using the Global Entry kiosks instead of the long customs lines.
For others reading this thread, https://www.cbp.gov/travel/trusted-traveler-programs/global-entry/international-arrangements/germany/german-citizens
is the next step after enrolling with the German Federal Police.