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Correct tire pressure for 21 inch wheels?

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Old Jun 15, 2017 | 12:52 AM
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jbak31
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gl550
Correct tire pressure for 21 inch wheels?
I recently noticed my 550 has 32 psi written as normal tire pressure on the inside of the gas tank lid. My tires were always pumped to 38-40 psi, because that's how it originally came. Which is correct? Should I deflate to 32 psi?
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Old Jun 17, 2017 | 11:48 PM
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bylife
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From: VIC,AU
GLS350d s
I am using 39 for front and rear at moment.
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Old Jun 28, 2017 | 03:02 AM
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2017 GLS 550 - 2023 S580
was told to use the info on the gas tank door. normal load says 35 front and 36 rear. this is on my 2017 GLS550
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Old Jun 28, 2017 | 02:09 PM
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Mitch Alsup
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S600
I am using 39 PSI in my 450 GLS, mainly for the extra suspension "spring" of the higher inflation pressures (i.e., firmer).

I am also getting 20 MPG on moderate trips in the city....
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