Generally speaking, the Germans are a serious bunch of people and stick to the rules, except perhaps trying to avoid paying tax. It is said that in Germany there is a regulation for everything. If it’s not regulated, it’s not aloud. There are also just about as many exceptions to the rule. Many professions exist simply for that reason.
Levels of fines and penalties are surprisingly low compared to most other European countries and seem to reflect this so-called collective responsibility, Vernunft. It is simply assumed that most residents should be and are honest. There are though, numerous opportunities to benefit the public purse.
Driving is one example. It’s true, there is no general speed limit on German motorways, Autobahnen, but many stretches are regulated by signed speed limits, which are often closely policed with unmarked cars and cameras. Inner city radars are widespread as are spot checks with handhelds.
Speeding and other traffic offences can be subject to on-the-spot fines. Pedestrians can be called to account for jaywalking, crossing red lights or throwing garbage on the streets. Cyclists can also be called to order quite easily for breaking the law.