[Fon]

W221, 2007 (pre face lift.)
Cd 320

Rear, 285/40/R19
Front 255/40/R19

I ask becuase I cant find the correct tire pressure for the 285 anywhere online, and im also experiencing quite a firm ride (can feel lots of bumps)

Many thanks,

Fon

 

[Skylaw]

More than likely it is a pressure problem. Try 29 front and 32 rear, see if that helps. If it is too soft, bump it up one or two psi. Also check that you have not set firm ride on your suspension, and that you are not in the "Sport" mode for your automatic shift program; that will make your suspension firmer.

 

[Vortecpwr]

door placard will show correct tires size. some times gas door will show tire size. I know it shows recommended tire pressures.

but having 19" means you have a small sidewall. no matter what pressure you set them at you are gonna get a rougher ride than say 17"