I want to check my partners tyre pressures this weekend but i simply cannot find the correct information anywhere! The book contains some weird pressure units (not bar or psi) and when i phone local dealers i get a rnage of replies from 32 psi all round to 35 rear/32 front. Help! Surely someone knows!?

The car is a C30 1.6 diesel DriveE

 

Have you looked inside the lid to the gas tank?

 

Inside of gas cap lid, or inside the drivers' door jam ("B" pillar). The tyres themselves will be labeled with a maximum pressure. That pressure is to never be exceeded. The temperature of your tyres will increase as you drive, and consequently so will the pressure.

 

i put 45 in my car after reading on my tire max 51

 

Paying attention to your car’s recommended tyre pressure is an effective way to lower its fuel consumption and save you money in the long term. This is because air can actually escape through the tyres’ microscopic pores so even if your tyre is correctly seated on the wheel rim and the tyre valve is working correctly, tyre pressure will still drop after some time.

There is no such thing as a completely ‘air-tight’ tyre. Loss of air pressure in a tyre causes it to sag and in turn cast a bigger ‘footprint’ on the road surface, which leads to greater rolling resistance. This means more energy is required from your car’s engine to propel your vehicle to a given speed and maintain it at that speed.

To overcome this resistance, the car’s engine needs to work harder to move at the same speed so it’ll use more fuel. While fuel economy rally drivers over-inflate their car tyres, we wouldn’t recommend it for day-to-day driving as over-inflated tyres can cause a loss of steering control, a less comfortable ride and reduce stopping distances.
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Rival Seal a Meal Vacuum Sealer
working from home

 

this is right..that max pressure is to never be exceeded or it may damage its Crank Position Sensor

 

35-38 is for most P1 platforms, but this is not an American vehicle.

DON'T GO BY THE TIRE OR EVEN CLOSE, THESE CARS NEVER SHOULD SEE OVER 42 PSI COLD IF YOU WANT CORRECT WEAR AND HANDLING. ONLY GO TO 45 PSI IF YOUR STORING YOUR VEHICLE, NOT DRIVING IT.