2013 Jaguar xf supercharge smokes after sitting about 8 hrs during cold crank. Does not smoke while driving.
I love Jaguars, but they should be traded in before the power train warranty has expired, preferably when the bumper to bumper expires.
What color is the smoke?
Worn out valve seals or worn out rings or both. A compression test would tell you a lot… well, it would tell ME a lot, or your mechanic.
Check the oil level in the supercharger.
If it’s low, the seals in the supercharger are leaking.