[samkimg]

Hi All!

I'm looking for info on tire pressures. The sticker on my door jam shows different info than the sticker on my fuel door (which I just noticed today at the gas station).

The door jam shows 32psi front and 42 psi rear, where the fuel door shows 30psi front and 35 psi rear. See attached photos.

Any ideas?

 

[El Cid]

Hi All!

I'm looking for info on tire pressures. The sticker on my door jam shows different info than the sticker on my fuel door (which I just noticed today at the gas station).

The door jam shows 32psi front and 42 psi rear, where the fuel door shows 30psi front and 35 psi rear. See attached photos.

Any ideas?

I asked this question earlier and didn't get many responses here or at MBWorld.
According to dealer either the label on gas flap or door jamb is OK. My luxury sedan calls for 33/42 per "B" pillar label. The flap label calls for 30/35 with normal load or 33/42 with maximum load.
Per page 230 or my operator's manual, the lable on the door jamb is for driving in speeds in excess of 100 MPH.
I called the MBUSA Customer Assistance Center and they told me to use whatever the "B" pillar label says. Couldn't tell me if the label might be wrong since they do not know specifically what the pressure is supposed to be for a 2010 E350 Luxury sedan.
Actually I have tried both 30/35 and 33/42 and can't really tell much difference in ride, etc.
You would think the label in the fuel filler flap would state: For speeds in excess of 100 MPH, if that is actually the case. Or is the manual wrong? I know mine has errors on how to operate the fog lights and the "tilt down" passenger mirror, pages 95-96.
Like the car so far, but it is confusing in many areas. Ride could be better.

 

[cerbomark]

are those the tire sizes on your car in the door jam?? Mine is 36/39 on mine with sport package. and the door jam and max load in the gas cap match. I don t think your tires match that door jam but I could be wrong. I see that yours does match with the gas cap max load, I always go with the higher number espically when it s cold weather as you lose 1 psi for every 10F degrees the outside temp drops.

 

[El Cid]

are those the tire sizes on your car in the door jam?? Mine is 36/39 on mine with sport package. and the door jam and max load in the gas cap match. I don t think your tires match that door jam but I could be wrong. I see that yours does match with the gas cap max load, I always go with the higher number espically when it s cold weather as you lose 1 psi for every 10F degrees the outside temp drops.

Your question probably was not addressed to me, but may save some confusion for some people.
Tire sizes match "B" pillar label-245/45R17 on my car. I have the luxury version with 17" wheels and same size tires all around.

 

[cerbomark]

Your question probably was not addressed to me, but may save some confusion for some people.
Tire sizes match "B" pillar label-245/45R17 on my car. I have the luxury version with 17" wheels and same size tires all around.

No but Samkimg s

door jam looks like you have 18 s in the pic??? Maybe I need glasses.
My sport has 18 s but I know the Luxury has 17 s.

 

[Sellinhomes]

totally confused !

I have a 2010 E350 4-matic sedan with sport package. It has the twin spoke 18" wheels with Perelli 245/40R18 97v on ALL FOUR wheels.

Question 1. Why do they have a lower tire pressure on the fronts when all four tires are the same? Can't they all be the same?

Question 2. What really is the factory recommended pressure settings for this vehicle? The door post and filler door have different information, I talked to 3 different dealer service depts and 3 different stories. lastly I called a tire dealer and got yet another story.

HELP

 

[cerbomark]

go with the door post info and that should match the tires on your car. Fronts and rear pressures are sometimes different for many factors even if the tires are the same size. A major reason is the weight of the car not equal front and back.

 

[Diesel Benz]

go with the door post info and that should match the tires on your car. Fronts and rear pressures are sometimes different for many factors even if the tires are the same size. A major reason is the weight of the car not equal front and back.

I agree with your observation, looks likely that the B-pillar sticker is for the actual tyres in the car while the filler flap is for standard tyres on that model. A pity the person asking did not come back and confirm this.

 

[El Cid]

Confusing isn't it?

I have a 2010 E350 4-matic sedan with sport package. It has the twin spoke 18" wheels with Perelli 245/40R18 97v on ALL FOUR wheels.

Question 1. Why do they have a lower tire pressure on the fronts when all four tires are the same? Can't they all be the same?

Question 2. What really is the factory recommended pressure settings for this vehicle? The door post and filler door have different information, I talked to 3 different dealer service depts and 3 different stories. lastly I called a tire dealer and got yet another story.

HELP

If you reference my earlier question and the responses in this forum, it gets even more confusing. I have a 2010 E350 Luxury Sedan with 245/45R17 tires on all four wheels.
The Operators' Manual says to use the TP posted on the driver's "B" Pillar label, which for me is 33/42R. The TP label on the inside of the fuel filler flap is only for driving 100+ MPH per the manual.
Per the dealer, any TP between the two on the fuel filler flap is OK. Per Customer Assistance at MBUSA, should use the "B" Pillar label TP. However, they could not give me a specific TP for my car as such.
I have tried both TP's and did not detect any significant difference in ride or handling, so I am going with the 33/42.
You can go to the Owner's site at MBUSA and e-mail them this question or call the toll free number and see what they tell you.
In the past what I have done is adjust the TP based on the wear pattern of the tires, but this does take getting about 5-10,000 miles on them before you can really tell.
Good luck on figuring it out.

 

[Diesel Benz]

If you reference my earlier question and the responses in this forum, it gets even more confusing. I have a 2010 E350 Luxury Sedan with 245/45R17 tires on all four wheels.
The Operators' Manual says to use the TP posted on the driver's "B" Pillar label, which for me is 33/42R. The TP label on the inside of the fuel filler flap is only for driving 100+ MPH per the manual.
Per the dealer, any TP between the two on the fuel filler flap is OK. Per Customer Assistance at MBUSA, should use the "B" Pillar label TP. However, they could not give me a specific TP for my car as such.
I have tried both TP's and did not detect any significant difference in ride or handling, so I am going with the 33/42.
You can go to the Owner's site at MBUSA and e-mail them this question or call the toll free number and see what they tell you.
In the past what I have done is adjust the TP based on the wear pattern of the tires, but this does take getting about 5-10,000 miles on them before you can really tell.
Good luck on figuring it out.

Doesn't your comment make this pretty clear. I understand that your fuel filler flap info is for the same tyres as the B-pillar sticker and they indicate the same figures for a tyre pressure that suits all conditions. The filler flap adds figures covering restricted speeds.

I don't think we have these stickers in the B-pillar in European cars, at least my dealer has never installed one.

How do you adjust the pressure from tyre wear by the way? Tyre shops claim that the old school rule does not work with modern low profile tyres, too low tyre pressure can cause the centre of the tread wear out, sounds odd to me this is what experts say.

 

[El Cid]

Doesn't your comment make this pretty clear. I understand that your fuel filler flap info is for the same tyres as the B-pillar sticker and they indicate the same figures for a tyre pressure that suits all conditions. The filler flap adds figures covering restricted speeds.

I don't think we have these stickers in the B-pillar in European cars, at least my dealer has never installed one.

How do you adjust the pressure from tyre wear by the way? Tyre shops claim that the old school rule does not work with modern low profile tyres, too low tyre pressure can cause the centre of the tread wear out, sounds odd to me this is what experts say.

To me the confusing thing is to have so many different TP's and for MBUSA and dealer's to have differing opinions also. Apparently the coupes and sports versions have different TP's from the luxury version based on what I have read here.

"B" pillar label may be an American thing. It's installed at the factory and is above or below the build information label.

I measure the wear of each tread and if not even, adjust pressure up or down accordingly. Excess wear on outer treads, means pressure is too low.

 

[Storm]

Tyre shops claim that the old school rule does not work with modern low profile tyres, too low tyre pressure can cause the centre of the tread wear out, sounds odd to me this is what experts say.

too low a tyre pressure would lead to wear on the outside of the tyre, too high a pressure would lead to excessive wear in the centre.

the reason it doesn't really apply to modern cars that much is becasue most are running low profile tyres and they don't flexc as much as old high profile tyres.

 

[K-A]

I've been playing with my PSI lately. I noticed my fronts were at 33+, I lowered them to about 30-31, and the ride seems a bit smoother on rough patches of road. The rears I had to let air out to get them "even", but now they're at about 31-32 PSI cold (about 36 when hot). I guess maybe I'll raise those up to about 35 PSI. 42 seems way, way too high.

 

[amg02]

Sorry for digging up a 4 year old tread, but I was curious about my tire pressures.

I have recently inflated all of my tires to 38 PSI cold(the stock Conti tires have a 51 PSI max rating), and I love the ride now.

Before I adjusted the tire pressures,I had my tire pressure staggered front and rear, and the steering was too stiff and unresponsive in my opinion.

Now the car feels better over bumps and how it steers as well as how it accelerates.

I have the 4matic and thought it was weird that my car should have lower air pressure in the front tires compared to the rear, because every other car I have owned with AWD listed the tire pressure the same on all four tires.


Note: I noticed over the last couple days that my front tires settle at about 41-42 PSI when warm and the rears at 40-41 PSI and they all cool down to 38 PSI when cold.

The ride is noticeably stiffer over bumps and when taking turns, therefore comfort may by why Mercedes recommends the PSI is to be set in the mid 30 range.

However, I like a stiffer ride and quicker handling, so 38 PSI all around works just fine for me.

 

[Tomb4239]

Air Pressure WTH!!!

The labels in my car state 36/42 in the door jam and 36/36 in the fuel door. I have the 4matic sport with 245/40R18 front and back (square setup). When I picked up the car the air pressure was set at 32 all around. Not sure why MBUSA makes the tire pressure settings such a mystery. I will play with my pressures to get the right feel. Also, different tires will behave differently at high or low pressures. Maybe this is why MBUSA has the varied tire pressures. The pressures are set based on the tires that came with the car. Anyone thought on this?:1poke:

 

[mike_747]

The labels in my car state 36/42 in the door jam and 36/36 in the fuel door. I have the 4matic sport with 245/40R18 front and back (square setup). When I picked up the car the air pressure was set at 32 all around. Not sure why MBUSA makes the tire pressure settings such a mystery. I will play with my pressures to get the right feel. Also, different tires will behave differently at high or low pressures. Maybe this is why MBUSA has the varied tire pressures. The pressures are set based on the tires that came with the car. Anyone thought on this?:1poke:

My car has the same set up "tire wise" as your car. I've found the ride quality is pretty much the same whether you use 32psi or 37psi cold. The sport model with the AMG 18" rims is a kidney killer no matter what you do. I just set my tires to 33/34 psi cold and forget about it. It would be interesting to drive a car with 17" wheels to see if the extra tire side wall material smooths out the ride at all?

 

[Cinnasnootzer]

Continentals all the way around...
F 245/40/18 Door sticker states 33 psi
R 265/35/18 Door sticker states 42 psi

I have been running 34 all the way around and the ride seems just fine. Kidneys are happy, ride is smooth. Seems like the suspension takes care of it in my experience....

Guess I could pump up the rears to 42 and see what happens. Sounds like a high psi but what do I know.

 

[Firestopper0383]

I have the kidney killer staggered AMG rims. I do keep my pressures up at the 33F/42R pressures. I ran the softer pressures 33/33 thinking the same as you, more comfort in the ride but, at the lower rear pressures the staggered setup ate through the rear tires in 17,000 miles. Replaced both rears at 17500 miles. I did not notice much difference in ride.
I have 38,500 now and am ready for all 4 tires. Front tires are age cracking and are very noisy, rear tires have a few more miles but tread depth is low enough to change all 4.
Current Tires are Pirelli P-Zero Nero. Will probably put on Continental DWS. (I think)

 

[Alex3]

I have the W212 4Matic wagon and run the higher pressures all the time. Tire wear is even and I like the ride.

 

[Vortecpwr]

when I perform services on any car, I set them at 35 psi. running 37/38 or higher in the rear with staggered setup will make the rear tire wear 50% faster in the center tread. I have never had a complaint from a customer running these pressures. tire size makes no difference.

on ML/GL, I run 37ish front and back.