Sports Car Market Publisher Keith Martin and SCM Contributor Philip Richter examine the potent and powerful SLS AMG (C197) built from 2010 to 2015. Designed with help from David Coulthard and power from an M159 engine that was the world’s most powerful naturally aspirated unit, this supercar was the spiritual successor to the iconic 300SL Gullwing. What should you look out for when buying one and what are they worth now? Our experts will tell you!