Complex sentence: In the Series 3 episode, "Broken Arrow", Arthur drives a Ford Granada Mk.II but as it is in for repair due to accident damage, he is forced to borrow a friends customised Chevrolet Corvette C3 Stingray that he is trying to sell.
Split into simpler sentences: In the Series 3 episode "Broken Arrow", he uses a Ford Granada Mk.II. However, due to an accident, this car has to go in for repair and Arthur is forced to borrow a friend's customised Chevrolet Corvette C3 Stingray that he is trying to sell.