2021 Mercedes-AMG GT73 spied winter testing

Mercedes-AMG’s new performance plug-in hybrid GT 73 has been spied completing winter testing in Sweden. With most of the test mule’s camouflage removed, it’s clear to see just how extensively the model’s styling has been lifted from the four-door GT 63. Large air dams reside up front while chunky, twin-tip mufflers rest on either side of a rear diffuser. However, Mercedes has kept the covers on the GT 73’s rear bumper and – most importantly – its charging port.