Each Chancellor has to sign a paper called Kanzlerakte, that he agrees, to give up sovereignty at lot of cases, e.e. intelligence, military.
There were plenty of shenanigans going on between the U.S. and German politicians in the early BRD days. But the scanned document everyone's been passing around purporting to refer to the so-called Kanzlerakte is obviously a fake.
We have peace now since more than a few decades. It doesn't need a signed peace treaty to have peace in a country.
The 2+4 contract has explicitly stopped the allied control.
US barracks are extraterritoriality zones, and US soldiers are not under German jurisdiction.
And better read the 2+4 itself, and not 3rd party writeups like Wikipedia.
US barracks are not extraterritoriality zones, please cite your claim.
"US soldiers are not under German jurisdiction", this is only partly true. It's part of the "NATO-Truppenstatut". With Art. 19 Abs. 3 Satz 1 ZA (Zusatzabkommen) the foreign soldiers are part of German jurisdiction.
Again, please cite your claims.