but where does it say in the ADR's you need self levelling and washer systems?
The same ADR has references to levelling requirements. I've already quoted the washer bit - pretty obvious that Xenons (at least factory bi-xenons) will give you 3x light output in comparison to halogen, so it falls into the category needing washers.
After a quick scan thru the ADR to ifnd the washer bit I do remember some referencing to either having manual level adjustments or self levelling, either being ok as long as the steup is compliant with the ADR.
And do cops quote ADR's or do they quote roads and traffic laws?[/QUOTE]
They quote both.
ADR = levelling, washers, cutoff shape, cutoff definition, etc.
Road rules = no glare to oncoming drivers.
Obviously the cop would need to be familiar with the ADR to be able to cite compliance or not at the roadside. Then again, if the car gets pulled off the road and gets independently checked, you might find the car defected for failing to comply with ADRs.