Currency
Germany is in the eurozone and uses the euro — no conversion puzzle here, unlike Prague, Budapest or Zurich. The trap is dynamic currency conversion: card terminals in shops and restaurants, and almost every ATM, will offer to bill you in Canadian dollars at their own rate. Always decline and choose to be charged in euro; let your Canadian bank do the conversion. Avoid the freestanding yellow-and-blue Euronet machines clustered around Alexanderplatz and the Brandenburg Gate, which are the most aggressive about it; withdraw at a bank branch instead.
Cards and cash
Berlin runs on more cash than Toronto does. Contactless is normal in supermarkets, chains and larger restaurants, but the domestic debit scheme is Girocard, and plenty of bakeries, Imbiss stands, market stalls, small bars, kiosks and even some museum desks take cash or Girocard only and will simply refuse a Visa or Mastercard. No German business is legally obliged to accept cards. Carry euro notes and keep coins for station and park toilets.
Tipping
Not a percentage culture and not obligatory. Round up, or roughly five to ten per cent for decent table service. The mechanics matter more than the amount: German card terminals generally have no tip prompt, so you tell the server the total you want charged before they tap the machine. Do not leave coins on the table and walk out; hand the tip over, ideally in cash so it reaches the server.
Power and plugs
Type F sockets, the round recessed Schuko style with two side earth clips; Type C europlugs fit the same hole. Mains is 230 volts at 50 hertz, roughly double Canada's 120 volts. A plug adapter alone is only safe if the device says '100–240V' on its label — phone and laptop chargers do, but Canadian hair dryers, straighteners and travel kettles frequently do not and will burn out or trip the circuit. Note also that a chunky North American three-pin plug will not seat properly in a recessed Schuko socket; buy the correct adapter, not the cheapest one.
Water and language
Tap water is safe everywhere in Germany and tightly regulated under the Trinkwasserverordnung — refill your bottle from any tap. Restaurants, however, expect to sell you bottled water; asking for Leitungswasser is legal but sometimes declined, so do not treat free tap water as a given. Berlin's water is hard, which affects taste more than safety. The language is German; English is spoken very widely in Berlin, more so than in most of the country, and menus in Mitte, Kreuzberg and Neukölln are often in English by default.
Safety and scams
Berlin is not a dangerous city, but pickpocketing is organised and geographically predictable: Alexanderplatz, the Brandenburg Gate crowd, Friedrichstrasse and Warschauer Strasse stations, the U8 between Kottbusser Tor and Hermannplatz, and Christmas and flea markets. Berlin police warn regularly about the shell-game tables that appear in warm weather around Alexanderplatz, the Schlossbrücke, the Kurfürstendamm and the East Side Gallery — they are rigged and you will lose. One Berlin-specific catch: there are no fare gates, so nothing stops you boarding without a valid ticket, and plainclothes inspectors work the U-Bahn and S-Bahn constantly. Paper tickets must be stamped in the platform validator before you board; app tickets are already valid. Genuine inspectors carry an official card and will show it if you ask — ask.