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Hi folks!
I've the 2017 GLE 43 W166 with 20" wheel and 265/45/r20 factory tires. When I brought the car at 2017, all 4 tires were inflated at 42 psi, I've been drive it for all those years and I never saw a tire pressure warning at the instrument cluster.
Recently I visited a tire shop and the staff inflated my rear tires to 46 psi, and then I realized the tire pressure sticker on my driver door require the rear tires to have 45 psi! I've drive the car for few weeks with this new setup and I find the tire noise from rear wheels increased a lot! Especially with high speed.
It confused me a little bit that if the recommend tire pressure is 45 psi for rear, why the tire pressure monitor didn't complain. I'd appreciate if you can share what tire pressure your car are running at.
I use 50psi cold on all four tires, 265/45R20 tires. My general procedure is to use the max pressure printed on the tire sidewall for max tread life and max fuel economy. Ride and handling don't suffer in my view.
Thanks fore sharing! I wasn't really thinking about the max-load factor. But I just found 2 previous services record (by mb dealer) and both of them say the tech checked tire pressure. So I assume 41-42psi for all wheels are what MB recommended in normal drive.
Since I'm not towing, I will to try deflate the tire and see if the road noise goes away.
BTW I thought 43 trim is almost a re-branded 400, but seems at least MB changed the recommended tire pressure
2019 s-class coupe 2025 GLS 580 SUV2017 S-class cabriolet
On my 2018 GLE 350 the tire pressure data on the drivers door frame states for "max load" which is front:45psi/rear 48psi.
The tire pressures for "normal loads" are stated on the data label inside the fuel filler door which is: front & rear 32psi each.
The above are all "cold" measurements
A lot , a lot of confusion, I have a standard ML350, 19 inch rims and run 36 lbs all the way around for over 60,000 miles Have had excellent tire wear but I take it easy and rotate every 5000 miles. I agree the tire pressure on the door is Max with one caveat, it should never exceed the max pressure listed on the side of the tire.
Inflating the tires to the max pressure listed on the sidewall of the tire is not advisable. It leads to a harsher ride, increased tire noise, decreased traction. It can also cause abnormal tire wear and make the tire more susceptible to road damage. The owners manual clearly states that the recommended normal driving conditions tire pressures are listed inside of the fuel filler door. The pressures that are listed at the driver door area are for when the vehicle is at it's maximum loaded weight (full of passengers, luggage, fuel, towing a trailer). The TPMS will not alert to tires that are over inflated. 1 psi + or - of air pressure is not going to be noticed by the driver (if you are a professional F1 driver this does not apply to you). I do feel that 32 psi in the tires is a bit on the low side and therefore run 36 psi just as Isawelvis does. To the OP, you should try reducing the pressure in your tires to what is listed on the fuel filler door, I think you'll like the results, after all it is what MB recommends.
Inflating the tires to the max pressure listed on the sidewall of the tire is not advisable. It leads to a harsher ride, increased tire noise, decreased traction. It can also cause abnormal tire wear and make the tire more susceptible to road damage. The owners manual clearly states that the recommended normal driving conditions tire pressures are listed inside of the fuel filler door. The pressures that are listed at the driver door area are for when the vehicle is at it's maximum loaded weight (full of passengers, luggage, fuel, towing a trailer). The TPMS will not alert to tires that are over inflated. 1 psi + or - of air pressure is not going to be noticed by the driver (if you are a professional F1 driver this does not apply to you). I do feel that 32 psi in the tires is a bit on the low side and therefore run 36 psi just as Isawelvis does. To the OP, you should try reducing the pressure in your tires to what is listed on the fuel filler door, I think you'll like the results, after all it is what MB recommends.
All good here running 50psi all around.
Wear is reduced and evenly distributed.
Ride and noise with 20” wheels has not changed.
Strong recommend for 50psi cold all the way around.
Strong recommend for 50psi cold all the way around.
50 psi on a 19" wheel is excessive let alone 50 psi on a 20 inch wheel. There is no way that ride and tire noise has not changed, that dog just don't hunt, it's physics. Here in Phoenix 50 psi cold quickly becomes 55+ psi once you start driving. Humor me and drop the pressure to 36 psi cold and go for a ride. I guarantee the ride will be MUUCH improved, the tires will be quieter and traction will increase. Heres a good read on the importance of tire pressures from a respectable source Why Tire Pressure Matters
50 psi on a 19" wheel is excessive let alone 50 psi on a 20 inch wheel. There is no way that ride and tire noise has not changed, that dog just don't hunt, it's physics. Here in Phoenix 50 psi cold quickly becomes 55+ psi once you start driving. Humor me and drop the pressure to 36 psi cold and go for a ride. I guarantee the ride will be MUUCH improved, the tires will be quieter and traction will increase. Heres a good read on the importance of tire pressures from a respectable source Why Tire Pressure Matters
When I bought the vehicle it had M-B rated pressure, and I ran it that way for about 12 months. I measured tread wear and was getting uneven wear across the face of the tire, excessive on both inner and outer shoulders, all four tires. I aired up to 50psi all around and the wear equalized across the face of the tire, all four tires.
Ride has not changed, it's terrible with 265/45R20 at any inflation pressure. Sidewall height on this wheel/tire configuration is inadequate.
[QUOTE=chassis;8177100 I aired up to 50psi all around and the wear equalized across the face of the tire, all four tires.
[/QUOTE]
This statement suggests that the tire is now overinflated at 50 Psi being that the wear is now even across the face of the tire, or are you meaning to say that the shoulders of the tires are still worn more than the rest of the tread surface but the tire as a whole is wearing at an even pace now?
This statement suggests that the tire is now overinflated at 50 Psi being that the wear is now even across the face of the tire, or are you meaning to say that the shoulders of the tires are still worn more than the rest of the tread surface but the tire as a whole is wearing at an even pace now?
No.
Original tires had shoulder wear in excess of center tread wear, all four tires, all exhibiting the same behavior. Pressure: MB spec. When pressure was increased to 50psi all around, wear evened out. Tires have since been replaced due to natural consumption of tread with mileage.
New tires are running at 50psi cold all around. Too early to measure wear, they are still pretty new.
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