A known trait of the older Gs is driveline vibration and a high-speed steering 'shimmy,' typically in the 50-70 mph range. Buyers ask about it directly and sellers highlight its absence as a selling point; when present it is addressed through driveline/steering repairs identified in inspection.
Driveline vibration and G-wagen shimmy
Mercedes-Benz G55/G63 AMG (W463 2004-2018) · mechanical