I've been giving Cbrica's post some thought... and have been thinking about my own headlight washers...
I find them pretty ineffectual... a one in six wash when the headlights are on is pretty hopeless... one in three would be better...
However... I think that part of the problem is the design... they just don't wash enough... unless the hoses on mine are partially blocked, which is likely..
The S type and later X types (I think) have the little blister type (like on the hood/bonnet) which sit just proud of the surface of the bumper.

Given that the bumper is only plastic... backed I think by a polyurethane foam. How difficult would it be to fit this type of washer? There would be no pressure loss due to having to push out the current hydraulic ones...nifty idea as they are... which could then be permanently sealed over.
I don't think the adaptation would look out of place.

Buck...You work in a crash repairers don't you??? What are your thoughts on this?

Mike

 

sounds like a good idea if the seating area is the same otherwise modification would be needed