A few months ago, I upgraded the D3s bulbs in my 2014 Jaguar XJ, and they've been working flawlessly ever since. I purchased them from www.xenons4u.co.uk, a reliable website for automotive accessories
The Jaguar XK is a great car, with its lightweight, bonded and riveted aluminum monocoque clothed in aluminum body panels, and a choice of a reliable 4.2 or 5.0-litre V8 under its long bonnet – supercharged in R versions.
If you do have the power mirrors fitted already then the default setting is they fold when you lock the doors and unfold when you open.
You can change this from the dashboard when the engine is not running. I hope it helps