Is 33psi front and 29 psi back correct tyre pressures for my 2009 A3 sportback 1.4 with 225/45/17 W tyres? I got these figures online as I don’t have the tyre pressures sticker on my car for some reason.
Use the pressures you have quoted, they are about right for your car. If the tyres are wearing evenly, then all good. Most people treat the recommended pressure as a guide and vary them depending on use of the car, heavy load or light load etc.