Regarding tyre pressures - if it's any help, the owners manual for my UK model (with a diesel motor) states:
225/65/R17 102V tyres - up to 3 persons 33psi all round, full load 38psi front, 41psi rear.
225/55/R19 99V tyres - up to 3 persons 36psi all round, full load 38psi front, 42psi rear.