Should I buy a Jaguar XF or a Skoda Superb as a private hire vehicle?

I am struggling to decide which car to purchase for use as a private hire taxi: a 2016 Jaguar XF 2.0 Portfolio or a Skoda Superb 2.0 TDI CR SE L Executive DSG. I will be averaging 100-plus miles per day,...

What's the best car for private hire work?

I have about £20k including trade in and am looking for a vehicle for private hire work. What do you think about the Mercedes E-Class?