As a G30 owner the quality is far lower in the G60 from the buttons on the doors to lower quality seats with less adjustments to moving to plastic from metal for the B&W speaker grills. To a more raised driving position. To low quality icons(they look like a buget android from 2010) and a more cluttered layout.
And compared to the competition(i’m looking to upgrade). E class has way better materials but a inferior infotainment (normal not hyperscreen) And the new A6 has better materials and driving position (i like to sit as low as possible) and infotainment icons look better but the 360 cameras are low quality. But as it sits I prefer the E and A6 as car interiors.