I had a 2015 XJ from new, complete with soft-close on all the doors. A couple of years later, a neighbour of mine bought bought a 2015 XJ and told me that it didn't have soft-close. I checked, and it worked on all the doors on his car except the driver's. Once again, the main dealer hadn't carried out the PDI correctly, and presumably the first owner never realised. I understand it was a simple fix. (Please accept Brit spelling!)