I had a CES-3 on my car when I purchased it but the previous owner said that it wasn't working properly so they disconnected it. I originally intended to pull it out and see if it was as simple as swapping a relay or similar, but in the end it felt like a lot of hassle so I just got a brand new unit fitted. The old one had a power light on it when it was removed so it's not completely dead, I think it just didn't correctly swap between modes or something.

Either way, it could be an easy fix for someone and it comes with a remote fob as well. Any questions let me know.