Do you have auto headlight levelling with the sensors on the left suspension? If so these should be plug & play. Strictly speaking for MoT you should also have headlight washers, but most testers won't complain about OE lights - those rules are mostly there to get rid of boy racers with purple hids in reflector headlights.
If you have manual levelling these are unlikely to work without some tinkering with the levelling motors, although that is based purely on experience of such things in other models. I've not actually tried it in a D2.
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