First off, 1G is acceleration, not force. The force exerted is the unsprung mass * G, plus the spring rate * length of compression. The downward acceleration of the wheel and hub can actually be greater than 1G, because the spring adds to the total force applied to the assembly. But the downward force is resisted by the viscosity of the shock fluid flowing through the valve, so it's probably much less than 1G in any specific example.

All the Mercedes suspensions I've ever owned are limited by the struts, not the springs. On bump, the external bump stop prevents the strut from bottoming and crushing the valve. On rebound, there's an internal mechanism (mechanical or hydraulic, depending on design) which snubs downward travel. The rubber mounts also help cushion both bump & rebound.

Shocks would be the same, except the snubbing mechanisms for bump can be internal.