They will undoubtedly enhance the residual value by some degree, but I don't see the big advantage myself. SW Scotland is renowned as being one of the darkest (least polluted by light) areas of the UK and having had Xenons previously (as part of the standard spec of other cars) I certainly don't miss them enough to pay the daft option price. "Horses for courses" though, as I will always spec a sunroof (similar price to Xenons) as for me that's essential.

Don't even get me started on DRLs. Humbug...

Back to peeling some more carrots...

Yes they are worth. Absolutely.I drive a lot at night and are worth an extra money.

In Slovenia, the Xenon in RS is fitted as standard.

matjaz