My Xenon lights do not have the tabs on the bottom to mount up a wiper assembly. But there is an unknown set of wire going up to both sides on mine, presumably for the wipers.

You may want to talk to some of the guys on the other side of the pond who have the HIDs to see the bottom of the light housing to see how the wiper is attached to it.

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-Justin

91 560 SEC AMG - other dogs dd
01 Honda S2000 - dogs dd
07 MB ML320 CDI - dd
16 Lexus IS250 - wifes dd

it's automatic.