wellinghurst

I am debating whether to buy an 02 or 03 ES300 or an 04 ES330. Looking for advice. Is the 330 motor much better (do you really have to run premium fuel in it?) There seems to be other differences as well (airbags, better NAV) I do want NAV-does anybody have experience with the 04 NAV vs. the 03 NAV? Any advice is much appreciated!