Tifoso48

My wife was driving this afternoon, giving me time to fiddle around and I looked at the AMG Performance on the center screen, which among other readings also provides tire pressure.

I noted rear left 36 and rear right 30, which clearly is way too low especially on hot tires.

I had jus picked up the car from service and knew the reading was odd.

So, I asked her to pull up the "service screen" in front of her to compare and the readings were totally different rear left 38 and rear right 33, still way to low.

I am sure both readings pull from the same source, how can they be different - and which one to believe?

Plutoe

forget for now what the gauge says-------find a small tire pressure gauge and manually check the tire pressures----what are they---then go from there

ygmn

Who knows how accurate TPMS sensors are.

Get a good tire pressure gage and note the accuracy of the one you choose.
most are 1% of full scale.
so makes sense to use one that the max pressure is just above your normal setting and for these cars 50PSI gage is fine.