50bchep:

If it is any help, the new W203's come with just such a tire and wheel, and factory recommended pressure is 30 psi front and 32 psi in rear. However, like the man said, I'm much happier with 34 psi all around. I know nothing about the European system. In the US, my tires are "H" speed rated (up to 130 mph or about 210 kph) and all H rated tires here state a maximum cold pressure of 35 psi on the sidewall.

Thanks,
Richard