I don't honestly think you will be able to get them working. Unlike the earlier cars, the wiring is completely different between xenon and halogen, it is more than just a few earths. Besides re-wiring the car and fitting leveling sensors, then there is the programming to make them work. I've been through a lot of things on the Insignia and I haven't seen a single setting yet to enable them.
I was the first to retrofit them to an Astra H, but i don't think I would even attempt it on an insiginia due to the cost.
I suspect this is why the dealers are no help.
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