Make your way to the fuel door side of the BMW 218i, and firmly press down. You'll see the mini door pop out. Related ArticlesHow do I open the fuel door for the Honda Civic?How do I open the charging door for Hyundai IONIQ 5?How do I open the fuel door for the BMW 218i?How do I open the fuel door for the BMW X3 2nd Gen?How do I open the fuel door for the Opel Mokka?