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Can someone with an E550 coupe post the numbers or picture of the placard inside their fuel door for the correct tire pressures? My fuel door looks like it was replaced at some point and I’ve seen mixed numbers online from 33 psi to 36 psi all around (unloaded/normal load and not max load). Just curious what it should be since I’ve been using 35 psi and the tires look kind of flat. But filling them up to ~40 psi makes the ride a bit rough. Thanks!
For the 18 in AMG OEM wheels it’s 38 front and 45 rear. It’s printed not only on the gas tank cover but also in the front door under the VIN number sticker.
I used to keep it always at posted figure but now I keep my front at 36 and rears at 43. Better comfort to be under inflated. Generally speaking the rim size and small sidewall makes it a bumpier ride. You could look to do 17 in rims and increase sidewall width if you want additional comfort.
For the 18 in AMG OEM wheels it’s 38 front and 45 rear. It’s printed not only on the gas tank cover but also in the front door under the VIN number sticker.
I used to keep it always at posted figure but now I keep my front at 36 and rears at 43. Better comfort to be under inflated. Generally speaking the rim size and small sidewall makes it a bumpier ride. You could look to do 17 in rims and increase sidewall width if you want additional comfort.
Please note that 38 front/45 rear are the pressures for MAXIMUM LOAD, not for normal driving/load conditions. As indicated in the fuel filler flap, the pressures for NORMAL usage are 36 front/36 rear. If you were routinely driving with 38 front/45 rear, I'm not surprised that the ride was harsh. Drop your pressures down to the specifications for normal load and the ride should improve greatly.
I run 34 up front and 28 in back.
34 in front because it corners better like that, and lowering it doesn't do much for the ride. 28 in back because the more I add the rougher the ride, and by a lot imo. They also grip better down there.
The ride in any car/truck I've had is much more sensitive to the rear suspension than the front. Well, except maybe a VW Beetle I had for a very short time.
So I always lower the rears, but there's a point where it starts to get sloppy and/or lose traction. Mine I can feel sloppiness start ~26.
A few times after getting new tires, with various cars, they'd fill them to whatever # is on the tire. Omg, then my only question is; do I let air out when I get home, or do I need to pull over now?
In my truck I remember that clearly. I think the rated # was 44? Sheezus! I run 12 in front, 9 in back. 44 might as well have been solid rubber. No, wait, that would've been softer.
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