The Mercedes-Benz S-Class Coupe could make a comeback as the automaker looks to move further upmarket. First spotted by Car and Driver, a pair of trademark filings with the European Union ...

We stay in Europe for a little longer for the third engine on our list: Mercedes-AMG's M178 LS2. Don't be fooled by the LS2 name, though — this has nothing to do with GM's second-generation LS ...