The ML delivers better real world fuel economy than the X5 (regardless what the EPA says). The old ML (1998-2005) was frame on frame construction, and did have a somewhat truck like drive (but not bad at all). The new ML (2006-2009) is a uni-body construction and drives amazing. It is smoother and silkier than the E70, and NO MBZ HAS EVER FELT LIKE A LEXUS, for the user who keeps insisting this. We've had 14+ Benzes, and NOT ONE has ever driven like a Lexus. Sorry!!