Had my DS in the shop this week to address what sounded like a chirping or squeaking from what I thought was the backseat area. Turns out it was not the backseat - it was coming from a loose assembly in the left tail light. The service guys said that it was a known issue at Land Rover and there is a specific bulletin on it. They got into the assembly and tightened everything down and now my annoying squeak is gone. Really hoping it does not come back.