E70 goes into trailer mode before coding- no brake lights?

[spyro235]

All, thanks in advanced for any information you could share.

I've just installed the factory hitch kit, including wiring and module. Installed as per the BMW service instructions. Yesterday I towed for the first time, and was happy to see that the running lights and blinkers worked fine. However, with the application of the brakes, the lights didn't change. The rear lights on the trailer are fully LED. I'm trying to make an appointment with a local coder to get my car coded for the trailer module, but it almost seems as though it's got the coding already. The car goes into trailer mode, turns off the rear PDC, and gave me trailer brake light warnings. Is this a result of the the trailer only having LED's, or because my car isn't coded properly yet?