Sir, Prado should be out...get a change of flavor...so you are left with the three remaining choices (from the mentioned ones)...and all three are extreme ends of the spectrum...
SUV LC - SUV say SUV replace karnee hai to LC is shortlisted...other choices are a tundra (but UAE mein the damn thing looks like a blue collars work truck...which it actually is...so I don't know if you'd even like to keep it back here in Pak...plus it's left hand)...escalade EXT again left hand...I know someone who got rid of his for 4 mill...
Merc E...well now you are talking about the baba ride...slow and status symbol...hmmm other options in this class...hmmm...(in 4 mill)...7 series, 5 series...but BMWs are pretty sensitive...Merc is still better...the new C class will also be there in the same budget...smaller but still the new shape. if you are not too worried about 2 door 4 door thingy...the CLK (early 2000s) can also be had...damn good car...much much better than the E and the C..
Sporty drive yet low key...is the Mark X...interior is great, bhps are good, acceleration is excellent even from int'l standards and it's low key as its a toyota...another advantage...resale is brilliant...
my personal vote is if you wanna go for a 4 door will be a mark x 3.0g...the best of everything but then that's me ........