Recommended tire pressure to soften up the ride on a C63S sedan
I have a 2015 C63S sedan and my one and only complaint about the car is that I findthe ride to be rather unbearable. I realize the suggested setting is something like 48 PSI all around, but I am wondering if others are running lower tire pressures to make the car more comfortable.
Suggested settings? I am running the Michelin PSS 265/35/ZR19's by the way.
Thanks to all for any input!
Rob
I have a 2015 C63S sedan and my one and only complaint about the car is that I findthe ride to be rather unbearable. I realize the suggested setting is something like 48 PSI all around, but I am wondering if others are running lower tire pressures to make the car more comfortable.
Suggested settings? I am running the Michelin PSS 265/35/ZR19's by the way.
Thanks to all for any input!
Rob
The recommended pressure for a C63S sedan is 38 front and 33 rear.--(up to 155 MPH and 3 passengers)
The chart is on the back of the gas door.
Do not use the numbers on the door pillar.
The numbers on the door pillar are only for the EPA so MB can get better mileage to advertise and NOT to actually use in every day driving.
The recommended pressure for a C63S sedan is 38 front and 33 rear.--(up to 155 MPH and 3 passengers)
The chart is on the back of the gas door.
Do not use the numbers on the door pillar.
The numbers on the door pillar are only for the EPA so MB can get better mileage to advertise and NOT to actually use in every day driving.
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The tiremakers even say you can drive 190km/118m/h with 42 psi if W speedrated and even 220km/135m/h if Y speedrated, but keep it at what I first gave.
This would cover a GAWR ( gross axle weight rating is maximum allowed weight to law) of 3300 lbs wich your car dont have .
Better is to add 10% for reserve so a GAWR of 3000 would be better as max.
For higher speed then 99m/h the pressure should be higher.
To make it short, determine the real weights on axles and give the maximum speed you use ( and wont go over for even a minuten), and I can calculate a save lowest pressure .
Normal use weight is mostly lower then the GAWR's so for that pressure can be lower.
The 48 psi would probably be enaugh for the maximum technical car speed of your car, but who rides that as max ?
If you cant determine the weights , try to find empty weight and give the way you load it ( persons and load) , and sertainly those GAWR's you can find on car.
My estimation is that 40psi all around will be save enaugh for your use.
Greatings from a "Dutch Pigheaded Selfdeclared Tirepressure -Specialist"
Peter
These are 18" wheels mounted onto a non-S C63 which has smaller diameter front brakes than a C63S. Those same wheels would not be able to properly clear the front brakes on a C63S.
C63 = 360 mm (14.2 in) diameter front rotors
C63S = 390 mm (15.4 in) diameter front rotors for standard brakes or 400 mm (15.8 in) diameter front rotors for CCB
Last edited by msd3075; Feb 27, 2018 at 10:18 AM.

With the pressure correct (sedan 38f--33r) and in C mode for suspension you are good to go.
I just put on a set of the new PS4S and they ride better and are quieter and have better traction.
With all of above done and knowing this car rides firm --it is what it is so get over it and quit whining or put on an after market suspension.
With the pressure correct (sedan 38f--33r) and in C mode for suspension you are good to go.
I just put on a set of the new PS4S and they ride better and are quieter and have better traction.
With all of above done and knowing this car rides firm --it is what it is so get over it and quit whining or put on an after market suspension.






