[Jethrow]

This is a tricky one I think. In some ways, a self arming immobiliser meets most of the requirements. Sure it does not lock the steering, transmission or gear shift, but it does have to be put out of action before the car can be started. And the self arming bit says that when key is removed (or engine stop), then the device has been set to act.

Going back to main ADR requirement which says "This Regulation applies to protective devices designed to prevent the unauthorized use of power driven vehicles", could that be argued as an alternative means of compliance?

One thing the steering lock does do is make it hard for someone to push away your vehicle, but note that you are allowed to lock the gear shift in neutral as part of the compliancing, so perhaps the requirement for anti push away is not the main driver of this ADR?

Thoughts?