I've been enjoying my IS300 SC for 3 months now and am well pleased with it in every way except for one:
An annoying groan/clonking noise that's coming from the rear of the car. It's only occasionally there, sometimes on cornering, sometimes accelerating or braking. To be honest in any other car I'd probably just put up with it, but the quality of the rest of the car kinda raises your expectations.
Any ideas? Could it just be the extra bulk of the "estate" flexing??
And before anyone asks - no there's nothing moving around in the boot