I'm not sure about the wheels/tires, but Yes to 3-5. You may also want to check out: http://forums.5series.net/e61-touring-discussion-4/ this site is also a great resource for us wagon owners and tends to have more European participation where our cars are far more common.

Enjoy your new car!

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2008 535 Wagon - Monaco Blue / Black - All the goodies plus JB4