Answer: OPTIONAL

AnswerCrossword Clue
OPTIONALAuto seller's word
optionalan elective course of study
optionalAvailable to be chosen but not obligatory
OPTIONALLike some auto features
OPTIONALDiscretionary
OPTIONALUnrequired
OPTIONALNot compulsory
OPTIONALNot mandatory
OPTIONALElective
OPTIONALLike some new car features
OPTIONALElective.
OPTIONALIf you ask for it
OPTIONALNot required
OPTIONALLeft to you
OPTIONALNot included
OPTIONALNot standard
OPTIONALNot necessary