Nitrogen filling station is 10 km from my home. Sticker says 32 Psi on all tyres in my GP 1.4 E. What should be the correct pressure that I need to fill?. Some where in the forum it is mentioned that for Nitrogen the pressure should be 1-2 units less. So should I stick to 34 on all tyres at filling station(10 km away)? Also the manual says the front and back should have different tyre pressure according to the load. Which is correct? Why they mention, all tyres should have equal pressure on sticker on front door side? Does the foot pump work for pressure top up in cars?