Mercedes/AMG needs to rethink their engines I think Mercedes needs to ditch the SOHC 3 valves/cylinder, and go to a 4/5 valve DOHC design. I mean this is supposed to be a high performance engine tuned by AMG but it's only getting 66hp/L. People on this forum give GM crap for there low hp/L in the Trans Am and Camaro etc. and here we have Mercedes Benz and AMG not doing to much better! In my opinion Mercedes needs to catch up with the times in the Engine/Transmission department.