Looking at the hardware, I think what limits towing capacity is the hitch itself, which is only rated for 5,000 lbs. Also the rear springs sag quite a bit at the limit. Do Euro models use a different hitch, and/or stiffer rear springs?

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Lenny

There are only three sports: bullfighting, motor racing and mountaineering; all the rest are merely games. --Ernest Hemingway

'10 GL550/'04 BMW 545/'99 BMW 323/'98 ML320/'87 VW GTI (race)