4x4 with Diff Locks is excellent to have, this feature is very handy when despite engaging 4x4 one is stuck. Your three advisers on Pajero (Rao, Mitsu and Deset Devil) are the best too.
I am expert of nothing, but man, i like keeping my vehicles clean. The pics you have posted of the interior of your Pajero are rather disappointing. Come on man, if you can afford a 4x4, you can certainly afford a dashbord cleaner, bend your elbows a bit, trust me you will enjoy your ride even more.
Vehicles are like pets, love them and they love you back, abuse them like an old prostitute and they will spread their legs at most unexpected places.
My congratulations on having your first 4x4, happy motoring