Tap water in Germany is perfectly palatable and unless in some large cities, even tastes nice. In fact if you buy bottled water in the store you’ll get bottled tap water (just not bottled locally), unless it’s some fancy brand like Vittel or Volvic. But those don’t come for free no matter where you’re at.

And yeah we don’t typically use ice in our drinks, unless you order cocktails. Agree it’s a bit odd to explicitly charge for it, but I guess if the restaurants pays for ice (usually they don’t make it on site), then I can see why they charge for it…