Tire pressure light
09-17-2018, 10:41 PM
#1
Junior Member
Thread Starter
Tire pressure light
I got the tire pressure warning light recently after having my car for 4 months. The gauge cluster also showed the pressure warning and displayed the pressure of all 4 tires with 3 tires flagged as low. The pressures though were 39-40 psi with it being 41 after few minute of driving. I looked at the B pillar sticker and read that the front should be 35 psi and rear 38 psi. I’m not sure why the light pops up and remains on. anyone run into a similar situation? I have the 20” all season tires.
09-17-2018, 10:57 PM
#2
MBWorld Fanatic!
I got the tire pressure warning light recently after having my car for 4 months. The gauge cluster also showed the pressure warning and displayed the pressure of all 4 tires with 3 tires flagged as low. The pressures though were 39-40 psi with it being 41 after few minute of driving. I looked at the B pillar sticker and read that the front should be 35 psi and rear 38 psi. I’m not sure why the light pops up and remains on. anyone run into a similar situation? I have the 20” all season tires.
You can set the TPMS to whatever you want.
The warning illuminates when the pressure drops a few psi below the save setting. I have the 20" wheels on mine too. I run mine to the cold unladen spec posted on the fuel filler door.
09-24-2018, 04:34 PM
#7
MBWorld Fanatic!
If you do have nitrogen in your tires, get your technician to replace those nitrogen indicator tire valve stem caps... they can corrode and become impossible to get off (and depending on your wheels, cost big-$$$ to repair).
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09-29-2018, 06:57 PM
#10
Member
I’m having an issue with my TPMS. Indicator says anywhere from 43 to 45 for my tires, yet my manual gauge check is between 36 and 38. That’s a big difference between the TPMS and my gauge. Anyone else having similar differences?
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Nationalleaguer (09-30-2018)
09-30-2018, 05:56 PM
#13
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Join Date: Feb 2017
Location: Northeast, USA
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GLC43, GTI, X3, Mazda3
Can't the TPMS system/sensors be off, as well? And isn't there something in the manual about this? I think this came up in this forum or the regular GLC forum in the recent past and the individual had to re-calibrate the actual vehicle system. Just bringing this up in case NL'r checks another tire gauge and still comes up with a discrepancy.
10-08-2018, 02:41 PM
#15
Member
I am happy to report the new digital gauge reflects the same PSI as the Vehicle TPMS readout. Glad the issue was with my previous digital gauge and not a glitch with the TPMS or the vehicle.
