The first letter of each word of a variable name should be uppercase, with the exception of the first word.
PostalBox should be postalBox.
Same for the method names.
CarSearchReturnsResults should be carSearchReturnsResults.
The name of a variable or method should explain clearly the purpose of the variable or method (what is the variable about, what does the method do).
A method that finds a text box and types a keyword in it should not be named sendPostalCode() but typePostalCode().