Jaguar XJ-Series (2015) is 860 mm (33.86 inch) longer and 109 mm (4.29 inch) wider than Mercedes B-Class (2017).
Mercedes B-Class (2017) is 99 mm (3.90 inch) higher, 488 kg (1,076 lbs) lighter and has 56 liters (1.98 ft3) bigger cargo space than Jaguar XJ-Series (2015).