e270cdi or 17

My tyres (245/55) were originally inflated to 32/32 (F/R) on delivery. Checked on the reference sticker in the fuel flap and this seems to be the setting for > 130MPH + 5 adults with luggage. The correct setting for < 130MPH + 3 adults is 29/30 (F/R). Can anyone else with a similar setup...