Wiper dwell

[HK1837]

Would have been standard on kingswood and optional on Sandman due to being based on base model in HX/HZ maybe

I doubt this would be the case. HX and HZ are Kingswoods in every way except for what makes them a Sandman. Basically the Holden build sheet is upgraded to a Kingswood except for side strips and Kingswood badges and then the Sandman package is applied as it was in HQ and HJ (so dash, steering wheel, frontal treatment, wheels, mirrors, stripes etc). This is why HX and HZ have Kingswood grille badge, tail-lights, scuff plates, paint colour range, trim (inc headlining), interior lights etc, whereas in HQ and HJ, apart from the paint colour range only the Kingswood utes get this as they are already Kingswoods in build spec prior to XX7/XU3 being added. So if HZ Kingswood came standard with CD4 then Sandman would have too. By what others have said above it appears to have become optional again in HX.