You may have a point with the towing comment. When I chose the D4 in the Volvo over the D5, I did my usual googling and other research and the general consensus was that if you DIDN’T tow, you’d probably never notice the difference between the 190bhp D4 and the 220bhp D5. Even though it was only a £50 upgrade, I decided to go with the 4 as it would never tow anything.
"Man is born in freedom, but he soon becomes a slave, in cages of convention, from the cradle, to the grave."