2. I have no intention of leaving after 90 days. By law I can only spend 90 out of 180 days in the Schengen Zone. I need a landlord who's totally okay with an illegal immigrant living under their roof.
Won´t work for long time!
I've already found a few places that come with internet. Also, I have friends who have had landlords that never bothered to ask for visas. And they overstayed their welcome no problem. Fact is, there are tons of illegal immigrants in Germany. I'm sure they can handle one more.
Definitive wrong! If illegal immigrants enter Germany, then because they want to gain residence permission on long term.
I am wondering when you are saying you lived before in germany. Germany should be one of the worst countrys in the world for illegal immigrants if they plan to stay there illegaly. Not only the police is bossy, also the germans are in general a mistrustful folk.
That means if you meet a policemen he will definitively ask your for a passport and check it.
If you are in any kind "different" you will be observed from the germans and some could also call the police for you.
Though Berlin is certainly better then Munich or Hamburg, especially if you live in a region with many foreigners.
Anyway you should really look for other countrys, depending why you are illegal or why you don´t want to stay in your home country there are for sure better choices.