What can fit 5 people, use not so much fuel, be plentiful in supply, cheap parts, tough, and good ride comfort? E-class Merc? Maybe, but Camry fits the bill better.
Those of you who have been to south-east Asia will appreciate the popularity of the Camry/Aurion over there, but I recently returned from my first trip to Cambodia, and literally 90% of the cars are Camrys. Most are sourced from North America, and some (many) may have been stolen and ended up there. Had a memorable five hour road trip from Siem Reap to Phnom Penh in a gen 2 Camry at night due to a missed flight. Tough cars. Just don't try and drive yourself. A few masochistic types will do the inevitable motorbike thing as tourists, but when you have that accident you will have regrets.