Hey,
I have recently been looking at the Mercedes GL class and I'm seriously interested in the vehicle.
But,

What are the main differences of the GL450 and the GL550?

Thanks
Kenny

 

2008 GL450 SUV[/align][/align]Rugged. The 335-horsepower V-8 engine takes on any adventure effortlessly. It's the only vehicle in its class to come with a standard 7-speed automatic transmission for smoother cruising and immediate response when accelerating and passing.[/align]$56,775*[/align]4.6L 32-valve V-8 engine-335 hp @ 6,000 rpm [/align][/align]

2008 GL550 SUV[/align][/align]382-horsepower V-8 engine, 4MATICâ„¢ 4-wheel drive, 21-inch 5-spoke aluminum-alloy wheels, 7-speed automatic transmission, and 83.3 cubic feet of cargo space.[/align][/align]

 

The GL550 will consume more petrol, unless you will be doing heavy towing or wanting a rapid SUV, the GL450 is enough. I think they both have virtually the same options.