InControl registration on used Discovery Sport
Yep, just bought a used 2016 Discovery Sport HSE Lux. Even though the InControl was still registered to the original owner - for me it was easy to change and get it working.
1. Using my desktop computer I went to the URL as instructed on page 177 of the owners manual, to register an account.
2. During the process of registering an account you must input the last eight digits of the vehicle VIN. At that point it stopped me saying the vehicle is registered to another account and contact your dealer. Yikes

3. Called my local dealer, (lucky) got someone on the phone that knew how to take care of this and he said he would call back in a few moments. He called back in 30ish minutes and spent about 15 minutes on the phone with me and cleared the previous owners link to my VIN#. (He then also found the account I had started creating using my email address) Then he had me go to the car, start it, and press the button with the wrench near the glasses holder & the rear view mirror until the light flashing changed then he said we were done and the system would be working in about 10 minutes. However first I had to finish setting it up on my PC using a link that he sent me. I followed the prompts using the link and I was done setting up the InControl system after another 10 minutes or so.
4. The link he sent at the end also contained another link to download the app to my phone which I did next. You need your account email & password here so make sure you record it for later while your creating your account.
With the phone calls and everything this consumed about 2 hours of my time to get it working. I think is OK since I did not need to drive to the dealer and try to find someone to help me. Win!! So now I will purchase accessories and service from this dealer.