Matus - thanks :)
It's all reached beyond the limits of my comprehension!!
Toyota have obviously done a great job with the auto, because it's very different to other autos we've had - much smoother and more economical.
On a slightly different note: We recently aquired an Audi A4 which has reinforced that you can't beat Japanese cars for day to day reliability. Nothing but niggling electrical problems, and a realisation that there are fundamental design faults, like not ensuring that the electrical system doesn't sit in a pool of water after heavy rain :tsktsk: We might have the odd minor complaint about the IS250 but in comparison we have little to complain about :winky: