There is a tire & loading information label on the drivers door jamb with the OEM recommendation (see attachment Page 639), unless someone has changed the wheels/tires on your car it originally came w/19" rims requiring 33 PSI. It also states in the manual if you are doing a lot of high speed driving to set them a little higher than 33PSI (see attachment Page 643). With all that said I keep mine at 35 PSI because my preferred tech @ dealership set them to that when he services my car.