I agree. I think everything is normal.
From your earlier posts, I was led to believe that your gauge pegged at "3" all the time.
You should see the gauge go to "3" immediately after you start the engine. Oil is cold and thicker at that point and will read high until the engine is warmed up. After some time driving, you should see the needle fluctuate and go to a nominal position at idle.
The behavior of this gauge isn't obvious unless you've owned MBs before.
I put AutoMeter gauges in my VW and while the oil gauge is mechanical, when the oil is cold upon startup, the gauge shows very high pressure readings. The needle drops steadily as the engine warms up.
Anyway, if you think the oil gauge gives unusual readings, wait until summer hits full swing and you get to watch your temperature gauge! Don't expect the temp gauge to go to a midpoint position and stay there!
2009 ML350 (84K) - Family vehicle
2001 CLK430 Cabriolet (71K) - Wife's car
2005 BMW 645CI (124K) - My daily driver
2012 Mustang V6 (60K) - Daughter's car