I've had this car for 6 months and have sorted most issue except the power steering pump. I have flushed out the fluid numerous times and put in Dexron 3 everytime and replaced the pump filter. Normal driving it works beautiful but does not have a lot of power assistance like newer cars. I thought this was normal however I was told by a so called power steering re-builder that you can test the pump by being stopped with your foot hard on the brake, then attempt to turn the steering wheel lock to lock. It should not get hard to turn. I tried this on my late model daily driver and he is correct. However on my 450SLC it becomes very hard. The power steering re-builder tells me that if it becomes hard the pump needs a re build including new vanes and a presure valve. Is this correct? Should the steering wheel turn with little effort lock to lock at idle with your foot on the brake? I am happy to spend the money if it needs it but dont want it to be the same after a rebuild.