Tire pressure question, use tire recommendation or vehicle recomendation

Maintenance/Repairs
1

I have a 2004 S430 MB with AMG package. I just put on a new set of Goodyear F1 Eagles. 265/45/zr18 on back and 245/40zr18 on front. Car specs 30 psi in front and 33psi in rear. Tire spec indicates max psi of 50

2

Use the Car’s specs, the tire Max psi is just that, the maximum pressure you can put in the tires.