Despite AMG's long-standing practice of offering four-cylinder vehicles, purists view models like the CLA45 and GLA45 as less authentic AMGs due to their small 2.0-liter engines. The recent shift to four-cylinder engines in the C63 and GLC63, enhanced by plug-in hybrid technology, has also raised concerns among enthusiasts. However, Mercedes is confident that the market will embrace these smaller, more efficient powertrains. Speaking to Australian magazine Carsales, Mercedes' top executive in Australia, Jaime Cohen, likened the gradual acceptance of these four-cylinder hybrids to the early adoption of buttonless smartphones. He recalled his own initial skepticism about phones without physical keys, but acknowledged that such innovations eventually succeed due to their inherent quality.

Cohen also pointed to the historical shift from manual to automatic transmissions as an analogy, noting that while BMW still offers manual options in some M models and the Z4 roadster, the automotive industry has largely moved towards automatics. He emphasized that while change is initially met with resistance, it ultimately becomes the norm. This sentiment is echoed by Michael Schiebe, head of AMG, who recently acknowledged that some customers may need time to appreciate the new technology. Schiebe highlighted the importance of being open-minded about technological advancements and confirmed that AMG will continue to pursue this progressive approach. Despite rumors, the C63 will not return to a V-8 engine, nor will the upcoming E63. Schiebe expressed confidence in the decisions made and encouraged excitement for the upcoming CLE63, which will replace the C63 and E63 coupes and convertibles.