It actually looks like they may be making the engines in Thailand now as well as assembling the vehicle there.
http://www.nationmultimedia.com/busi...-30202403.html
I know this ^ article is a little old but MDC power has been making engines for several Mercedes Vehicles now as well. The three cylinder is similarly designed to the four cylinder 4A9 engine...
https://en.m.wikipedia.org/wiki/Mitsubishi_4A9_engine