Differences in E550
1. Folding rear seats is a stand alone option regardless if 2014 W212 was produced in 2013 or 2014. My car's production date is 03/2014 and I do have folding rear seats (was one of the long list of options I gave my dealer to find).
2. The button to lower rear head rests (but not to fold, since they're not foldable) was indeed removed for 2014 w212 cars produced in 2014 - my 2014 E550 produced in 03/2014 does not have it (its blank), while my previous 2014 E350 produced in 06/2013 did.
So to summarize, the folding rear seats is a stand alone option available regardless what year car was produced in, while the button to lower rear headrest was eliminated for MY 2014 in calendar year 2014.









