mwmeci

The door jam sticker says 42psi rear, 35psi front. Nothing about cold tire pressure.
The gas filler doors says 33psi rear, 32psi front, cold tire pressure.
That's quite a difference
I'm running Bridgestone DriveGuard (run flat) tires at 34psi for front and rear. Sometimes 35psi.
At 60 to 70 degrees F they heat up to 37 psi on the highway at 65 to 75 mph.
At 90 degrees they increase even more.
Any thoughts on that 42psi? At warm temps that could rise to 45 or 46 psi.
Any thoughts why MB puts 2 recommendations on this model.
Another subject, do you think this plastic chrome edging I added to the doors and hood might lead to rust over time?