At what % below set TPMS value will low pressure light come on?
Out Of Control!!
Joined: Nov 2018
Posts: 11,403
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From: San Francisco Bay Area
2019 C63CS
By law it has to come on if the pressure drops 20-25%, and that's typically when the factory TPMS systems throw up the tire pressure warning. So in your case it should come on at ~28 to ~30 psi at the latest.
Newbie
Joined: Jan 2020
Posts: 2
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From: Arizona
2013 White ML350
Two different pressures
The fuel door placard doesn’t agree with the drivers door placard for air pressures. Can anyone tell us why?? Door says 45-48 f-r and fuel says 32 ???
2013 ML350 gas
2013 ML350 gas
Thread Starter
Member
Joined: Nov 2012
Posts: 237
Likes: 2
C300, ML350
Not sure why there is a discrepancy but I have always been told that we are supposed to follow the pressure listed on the fuel door. Personally I found anywhere from 35-38 Psi works the best for me.
Last edited by c3002008; Feb 24, 2020 at 07:02 PM.
Out Of Control!!
Joined: Nov 2018
Posts: 11,403
Likes: 5,325
From: San Francisco Bay Area
2019 C63CS
Last edited by superswiss; Feb 24, 2020 at 11:57 AM.
