Granted, I’m pretty sure it extends because dropping any washer fluid on the wiring would cause the car to short out and explode.

Between this, the weirdo single wiper blade, and the washer jets located on the wiper arm, I’m convinced that some Jag designer had a bizarre fetish for quirky wipers and related parts.

ETA: You can dump an entire bottle of washer fluid into a not yet empty reservoir and still never see it come above the filler. I’m pretty sure that the reservoir is actually a TARDIS, which makes sense since the car doesn’t have a low wiper fluid warning.