I have an ECB bar on my MY13 D4. Chose it because it was compatible with factory parking sensors etc etc which was a problem with other bars at the time. It's not everyone's taste but I like it. I just checked their web site and it says "Series Discovery 4 - Has not been tested on 2014 models" so I can't see how OL can guarantee that it will be OK with an MY15 model.
HTH
Martin

