Are there any problems with Blue Efficiency?

What is your question?

I am thinking about buying a 2012 MB 350 C Coupe Premium pkg with 44,000 miles on it. Also has "Blue Efficiency". The videos are mind boggling and it seems such a complicated engine Does this engine present an increase in repairs? Also, it seems this car has had a lot of recalls? Some very expensive to fix; am I right? I have a 2007 CLK 350 Coupe w 88,000 mile, it's been a rock star. Would it be wise to get rid of it before it gets too many more miles on it? Shall I stay w what I have and am I inviting problems?? Much Appreciate your Advice, Elke

What makes this problem better or worse?

General question about Blue Efficiency