The tire pressure that is printed on the tire is the max pressure that the
tire should be inflated to with the max load the tire can carry. The max
load that the tire can carry will exceed the max load of the car by a very
No, the *right* tire pressure is never on the tires. Only the maximum
tire pressure is. That is the cold tire pressure that one should never
exceed or you may cause catastrophic damage to the tire.
The right operating tire pressure will generally be printed on a placard
somewhere on the driver's door jamb. It will vary with the size and
type of tires you have mounted.
It varies depending on the load in the car. With the driver
only it's 30/35. With driver + 3 passengers and a full trunk,
I believe it's 35/42. This is for a car with no Sports Package.
If you're in the US and if you sign in to "Owner's Circle" on
bmwusa.com, you will be able to download a manual. I assume
you'd be able to do the same at the websites for other countries
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