Well fellows, I have been driving it all over the place, and I can find nothing wrong with this car, aside from the noise. Having checked the posts on here and other sites, it seems the 430 is fussy as to what tyres we use. Anyway, it is booked into the specialist who has been maintaining it the five years the seller (a Limo operator) has had the car. This specialist also works on many other Limo operators 430s and 460s, so I am happy he knows what he's about.
I have asked he check the wheel bearings and to do whatever other work he may think fit to make the car perfect. he reckons only oil change and wiper refills. I hope this is the case but am quite happy to get whatever done. which brings me back to the tyres. I have searched and Michelin Primacy seem to be the choice of the American owners with the UK owners going for Falkens. My wheels are 18s and present tyres are 245/45/18. I really want to be able to enjoy the quietness of this car so will pay the premium to ensure that I do. Please guys recommend a tyre, is anyone running Hancocks? I had them on a Touareg and found them great. but different cars need different tyres. I had Michelin Pilot on a Saab and again found them great. Thanks bilmac