Petrol pumps in Scandinavia all take credit cards, you never pay in the garage.
In some cases (especially in rural areas) there is only a single payment location, you then nominate which pump number (and sometimes the type of fuel) when initially prepaying.
The shared single payment terminal,
Fuel is available 24 hours a day, even when the shop (if present) is closed, this is especially important for rural areas where the garage may be unmanned.