C300 Tire Pressure
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Joined: Aug 2016
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13 C300
C300 Tire Pressure
I'm a bit confused about what the correct tire pressure should be on my '13 C300 4matic with stock 17" wheels.
The fuel door says 30f and 38r when cold at max load but that's it. There is no mention of a recommended pressure for a normal load.
Should I just use 30f/38r or is there something I'm missing?
Thank you for any help.
The fuel door says 30f and 38r when cold at max load but that's it. There is no mention of a recommended pressure for a normal load.
Should I just use 30f/38r or is there something I'm missing?
Thank you for any help.
Member
Joined: Dec 2013
Posts: 197
Likes: 17
From: Connecticut
C300 4matic
Look at the drivers door jam there should be a tire pressure label there and it states the tire size and recommended pressure. The fuel door is not the correct pressure. I have 18" wheels and the air pressure on the fuel door is different than on the driver door jam. I use the driver's door jam it's the correct one to use.
Super Member
Joined: Sep 2015
Posts: 848
Likes: 87
From: Milwaukee, WI USA
2012 C300 4Matic
The door jamb states it is for "Extra Load". The fuel filler door states it is "Maximum Load", which is 3 pounds less than the door jamb. Then it states to add 3 pounds if going over 100 mph, which is what is on the fuel door. I would guess the fuel door is the one to go by for every day driving. Why they need to have something about air pressure in two different spots and then explain in two different, yet equally confusing ways is beyond me.
I don't know that it really makes much difference in every day driving as long at you don't drive long stretches at over 100mph. Might be a little harder ride and a touch quicker handling response, that's all.
I don't know that it really makes much difference in every day driving as long at you don't drive long stretches at over 100mph. Might be a little harder ride and a touch quicker handling response, that's all.
Super Member
Joined: Aug 2013
Posts: 709
Likes: 48
From: NFLD
2017 C43 AMG, 2010 C350 4Matic, 9 Motorcycles
It is surprising how much even 1-2 psi can change grip and fuel economy.
If you're ever on dirt roads (by ever I mean frequently) then having the PSI lowered will drastically help your grip, especially if there is wildlife and potential hazards around!
As Alfadude stated, you will get a touch quicker handling with the extra pressure, almost unnoticeable to be honest, but that applies only if you have traction to begin with!
Do a little reading (if you're unfamiliar) on the benefits of lower vs higher pressure, which there are plenty of resources on the googler for, and choose according to your driving habits!
All the same, interesting they make this distinction! Confusing or not, it's nice to know the engineers take the time to deal with this kind of thing and then relay that information to us! (Even if it is convoluted!)
If you're ever on dirt roads (by ever I mean frequently) then having the PSI lowered will drastically help your grip, especially if there is wildlife and potential hazards around!
As Alfadude stated, you will get a touch quicker handling with the extra pressure, almost unnoticeable to be honest, but that applies only if you have traction to begin with!
Do a little reading (if you're unfamiliar) on the benefits of lower vs higher pressure, which there are plenty of resources on the googler for, and choose according to your driving habits!
All the same, interesting they make this distinction! Confusing or not, it's nice to know the engineers take the time to deal with this kind of thing and then relay that information to us! (Even if it is convoluted!)
