LOL! I could just imagine her babbling "jeep".
Maybe she is under stress? She may be just saying random stuff. I suggest you go up to her and casually ask if you buying her a new Jeep would be a good idea. If she is delighted, yes, she certainly does want one. If she seems 100% surprised, no, she probably doesn't (but it would be a good bonus to your marriage life, if you know what I mean!)