The gas cap and the driver door tire pressure labels on my GLE have different recommendations. The gas cap recommends 32front/32rear for a normal load and 41/44 for a max load. The driver door label recommends 45/48. Which am I supposed to follow?
Gas door - normal load. Unless you are fully loaded with max. passengers and cargo/luggage with a full tank of gas. Those are cold tire pressures btw. Note at the bottom +4psi hot. The door jamb is max gross weight, add that 4psi to the max load on the gas door cold and that equals the door jamb. Why? German engineers.
I air up to 45psi cold all around. It helps avoid uneven wear across the tire. The dealer adjusts to 35psi at service appointments, and I add air back to 45psi. At lower pressure I was getting shoulder wear, both inner and outer. This has stopped since increasing to 45psi.
Mercedes specifies tire pressure and alignment settings to maximize ride comfort, handling and safety (grip). Tire wear is the variable they didn't solve for in their specifications, so the consumer needs to take action to achieve better treadwear results.
I air up to 45psi cold all around. It helps avoid uneven wear across the tire. The dealer adjusts to 35psi at service appointments, and I add air back to 45psi. At lower pressure I was getting shoulder wear, both inner and outer. This has stopped since increasing to 45psi.
Mercedes specifies tire pressure and alignment settings to maximize ride comfort, handling and safety (grip). Tire wear is the variable they didn't solve for in their specifications, so the consumer needs to take action to achieve better treadwear results.
There is truth to this, but that wasn't the original question. But it certainly is not bad advice.
There is truth to this, but that wasn't the original question. But it certainly is not bad advice.
E55, thanks for the comment, but on the contrary, it directly answers the original question. The title of the thread is - which is the correct tire pressure? My answer: 45psi cold all the way around. Additional verbiage was provided to give a basis for the recommendation.
E55, thanks for the comment, but on the contrary, it directly answers the original question. The title of the thread is - which is the correct tire pressure? My answer: 45psi cold all the way around. Additional verbiage was provided to give a basis for the recommendation.
My dealer told me to follow the fuel door placard as daily operating information (somewhat to the point of the manual icon shown) with the door jam information relating to maximum vehicle capability for reference.
My question related to this quote is why not vary the front/rear psi? I've see a tech write-up somewhere that even suggested 1-2 psi higher in the front tires for normal everyday driving- not factoring in towing.
I like my contact patch indication with 36psi, but am considering upping that to increase gas mileage. After seeing related posts here and included with other topics it doesn't appear the increase negatively affects handling so when the camper tow season starts I go to 44 front and rear and leave it there. Only once did I drop it down to follow normal and max load values, but realized that it wasn't worth switching pressures back and forth.
TIres have a LOAD capacity and it is proportional to Air Pressure.
What is shown on tire sidewall is MAX pressure and listed on websites for tire is Load capacity.
MB and other manufacturers set pressures based on many factors.
One being SAFETY from TIPPING (SEE FORD)
Another is load capacity so pressure has to be above certain amount to stire can handle vehicle dead weight and live load inside (Passengers and cargo)
Another is wear life to ensure tread will wear evenly based on weight.
