Well if she has to have the third row seat I would consider the Mercedes GL Series. If she did not have to have third row then I would suggest the Mercedes ML350. Currently, my father and I drive daily the Mercedes ML350. He said hands down this is the best vehicle he has ever owned (he has been driving over 50 years and has had different vehicles over the years). Mileage he has over 250,000 and I have over 140,000 without any major service (just normal things so far). It has plenty of power for the size of suv that it is. I drive alot and it is a very comforatable vehicle to ride in. When it comes time to replace mine I am going back to the ML350.