Just checked my pressures as I hit first thousand miles in my B8 S4 and was surpirised to find the garage had delivered the car with 48+ psi all round.
Fitted with 255/35 19 dunlops and i know it says 50 psi max but cany believe thisi s right running pressure. Been thinking the car felt skittish when the power was applied and think i can see why now.
I've dropped them to 40 front and 38 rear but this is still well over the label on the door jam that says 36 fromt and 33 rear. Car feels alot better on handling and the power steering feels better at low speed too. Guess it was getting confused with the high pressure making it think it was going fast so it reduced the assistance load making it feel heavy and sluggish.
What does everyone else run?