To me... The the only exciting mercs are AMG's.. Or the 'upper' models..
Their fuel efficient diesels are nice and all, but no moreso than .. A golf diesel..
Where a 328i, that's not bad.. Does merc even have anything close to the 135/335 domination bmw has had since 2007?.. Course not
Merc a class? Shiiit
Bmw 1er? Nice!
Audi a1? Not bad at all! Little but quick!