Don't tip unnecessarily. A few Euros for decent service, maybe round up the bill to to the next 5€, and if the service was average or below don't hesitate not to tip at all. German service staff get reasonable pay and don't rely on tips to survive.
--Edwin
70
Don't toast with water in your glass!! It is said that will bring bad luck, maybe even death.
--El Toro
When clinking glasses and cheering in Germany it is considered important to look into the other persons eyes.
--Chris
20
Don't expect ice in your drink and there are usually no free refills. Also no free water. If you want water, ask for a bottle of "still" water, the default is "gassy" water.
--Christine F
10
Try to go to a bakery early on the morning, the just baked breads are delicious! Usually eaten with butter, cheese, sausages, jam or chocolate
--Cocoo
10
Use fork and knife for ALL food, even french fries and pizza.
--Zee