Mid-cycle refresh of the Mercedes-AMG CLA45 S tweaks the styling for both sedan and shooting brake models. AMG’s potent turbocharged 2.0L inline 4 engine remains, pumping out 416 hp and 369 lb-ft of torque. Not bad for a small four pot. The same eight-speed dual-clutch transmission is in play again helping to launch the CLA45 S from 0 to 60 mph in 4 seconds flat.