Surprised at the fit and finish of an American assembled MB. Quite a departure from my '98 ML320 that my mechanic often cursed 'this is not a Mercedes!' Why choose the GL450/550 when 1) gas version comes at a $2500 premium over the diesel (not the case usually with diesel vehicles) 2) gas version requires premium unleaded fuel (premium still costs more than diesel) 3) the diesel gets 18/24 gas gets 13/18 ( GL550 will fare worse); average economy for both cars at 12k miles/year and factoring price differences for premium vs. diesel you'd save ~$600/yr in fuel savings on top of the $2500; Not noisy, not slow, no smoke or smell; 0-60 who cares?? it's an SUV
400lb-ft torque! rear 3/4 windows open, 7 speed auto surprisingly doesn't hunt, leather stitching & leather covered dash; solidity and drive smoothness give impression of an S-class not an SUV, backup camera, 3rd row seats, hitch, zero wait time to start, push button close rear door
A la carte options on $50k+ vehicles like leather, sunroof, Xenon lamps, heated seats should be standard. Nav complicated by very stiff joystick instead of a touch screen. By comparison, my son's Honda Odyssey is instantly understandable without the manual so why not copy it!