For a start, tipping in Berlin is not obligatory. Serving staff in Germany earn a living wage and don't depend on tips.

Nevertheless it is very common to leave a tip if you enjoyed your meal and service. 5- 10% of the bill is a common amount for a gratuity.

Do so by either:

  • rounding up the bill to the nearest even amount of euros, say "Auf [amount] Euro." (This is the most common way.)
  • telling the waiter how much change you want to get back, or
  • telling the waiter the exact amount of tip you want to leave them and he will bring you the rest of the change.

Do not leave money on the table! Of course the servers would probably get it but it is not the custom, and someone else could easily come along and take it in a crowded restaurant.

If you want to ask for your change in any mix-up, tell the waiter "Wechselgeld, bitte."