The us already has a full blown military base IN Germany - there is likely plenty of intelligence sharing already and similar interests around security. Not sure US needs to back door too heavily for most info
Germany not only has several important bases, like Ramstein with the largest American military hospital outside American soil, and several other large bases (K-Town), but also houses two of eleven unified combatant commands in a single city: EUCOM and AFRICOM are both in Stuttgart.