I think when it says less for something that's normally there it's to do with linked options.
So for my Jaguar X-type print out it had "less rear parking sensors", but then further down it says "front and rear parking sensors", because you can either have just rear parking sensors, or front and rear. It would make more sense to just put say "rear parking sensors - yes" then then further down "front parking sensors - yes" but It's to do with building them i think, because on the X-type for example the parking control module is different if you have just rear sensors compared to the one for front and rear so it tells the production line staff which part to fit.
Sometimes manufacturers let you delete standard fittings. So on a van for example you might be able to delete the rear door windows or the passenger seat. I've not got a RR brochure yet, but it's possible you could delete some stuff you didn't want.
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