The Xenon headlights were an option extra for the ST170 only as part of the comfort pack, 80% of the ST170's i see do not have Xenon headlights just normal ST ones, you need to get hold of non xenon ST170 headlights, you may need the loom too. The ST170 non Xenon headlights are unique to the ST170 also. Dont bother with non ST170 standard headlights they look pants