A Jaguar is still a highly desirable brand, the name has incredible amounts of prestige. It's just recovering from an era of awful Ford managed days, but wide acclaim and 3-digit sales growth year over year shows that the brand is still desired. More importantly, back to the original comparison, the XF is a mid-size executive sedan, the C-Class is not.
I wasn't comparing the brand badge, I was comparing the model badge. XF over C-Class any day of the week simply because you get more for your money.
Gotcha
Edit: there are lots of idiots