So I'm going to tell you Scotty's general opinion on Mercedes products: "endless money pits." and I totally agree with this statement. They are over engineered expensive to fix cars. If you live somewhere that you can import new cars from Japan then why not consider a new Toyota? Maybe something like their new Rav4 which is good quality and very nicely made and roomy too.

Hi,

The Mercedes B class wasn't a bad car, In some parts of the world they were popular taxies.

It's not uncommon to see the 2.1L Diesel TAXI SPEC reach 300k miles or more.

But the regular everyday spec has a pretty troublesome and expensive to maintain dual clutch, so only manuals.

And as far as engines, the only one I'd recommend is the OM607 since it's based on a reliable and popular French design.

If you can find a B class 160CDI or 180DCI manual - and mechanics in your area know how to work on Mercedes and Renault, eh it can be alright (It's rated at 56-60 US MPG COMBINED). Same goes for the 3rd generation CLA, the 180CDI is not a bad deal if you can find it with a manual.

But generally, It's better to go Japanese. 

In so many parts of the world we wish we could still get cars like the Fortuner AN150/160, Suzuki Vitara BoosterJet AllGrip, and Daihatsu Rocky amount many other special cars the rest of the world misses.

I wouldn't recommend a B-class. They aren't as reliable compared to Japanese brands and parts are very expensive. I'm guessing you live in Malaysia, in which case you also have to deal with degrading plastics thanks to the heat of the SEA region.