You're required to use bike lanes within city limits when there's Zeichen 237, Zeichen 240, or Zeichen 241. Otherwise you're free to use the road. Any other sig

You're required to use bike lanes within city limits when there's Zeichen 237, Zeichen 240, or Zeichen 241. Otherwise you're free to use the road. Any other sign even if it has a bike symbol on it, does not mandate the use of a specific path. But indeed, Schutzstreifen next to parked cars often have the problem that you either have to veer into traffic (or traffic veers into you), or get doored (I don't recall that it's mandatory to keep your distance to parked cars, though, it's just in your own best interest). Even though motorists are required to keep 1.5 m distance to you there, very few do, since apparently the dashed line implies that you're safe enough from them ...