Can I use the toilet?
twa-LET-te — French loanword, stress on second syllable
When you need to use the facilities at a petrol station.
'Toilette' is the most common word for a public bathroom in Italy, also called 'bagno' or 'servizi'. Petrol station toilets often require a purchase or a key from the attendant.
Dove sono i servizi?
Where are the facilities?
More formal term
Il bagno e libero?
Is the bathroom free?
Checking if occupied
Ho bisogno di una chiave per il bagno?
Do I need a key for the bathroom?
Asking about key requirement
In Italy, it is common courtesy to make a small purchase (a coffee or snack) if you use the bathroom at a petrol station bar. This is expected but not always enforced.