my 2004 ML came with 255/60/17, my friends 05 ML runs on this size also, the other size option for the 17'' rims is the 275/55/17, I have just put Grabber AT2's on mine and had to vary size slightly to 255/65/17 to get the required H rating, but they are less than 1'' larger overall and fit fine with plenty of clearance everwhere
supersport