DavidC
Has your car got standard size tyres?
If not the hand book pressures are not really valid, if in fact they ever were,as the 22 seems to be generic.
Lots of interesting threads on this site regarding optimum pressures, but in reality try anything from 18 to 28? and find your best compromise between ride and grip/feel.
I went up a tyre size on my 4/4 and lowered the pressures a couple of pounds which suited me.
