You will probably want at least 34 front, 32 rear (cold - always measure pressures cold). In the wet, add another 2 psi all round. (45 is way too much for normal driving.
Generally, servo gauges get the hell mistreated out of them, so buy your own tyre gauge, and use it to measure tyre pressure. It may not be correct, but it will be consistent. (although the digital BP units appear to be pretty accurate)