The car should stay within reasonable operating temperatures without assistance from the aux fan, so its not the issue -- but for simplicity, it works when the temperature reaches 110C. I hear it turn on after the car has been off for a few minutes and I restart it. I should get a resistor on the sensor so it turns on at 100C instead of 110C, but like I said, its a side issue not really related.

Is there such thing to test the amount of pressure the pump is outputting? I'm curious?
What about some sort of IR Thermometer test on the radiator? Although I know it may be difficult since the car is not "technically" overheating, but just running hotter than normal.
With A/C on, its dog slowwwwww acceleration due to the engine retarding timing so much due to the increased engine temp.

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2016 Monsoon Gray Audi Allroad - 21k
2008 Black Mercedes E350 4Matic Sport - 131k
2014 Jeep Wranger Unlimited Sahara - 62k
2003 Gray Mercedes ML350 - 122k