Hey @mld and @FRR, we've never tried this before, but it really depends on what is available on the CAN bus network of your car. In other words, if the command to crank and start the engine is present in the bus, then you will be able to send that message without cutting any wires.
I have experience with a Hyundai Sonata 2006 and that does not have that CAN message present from what I could tell.
Re: BMW 535 2016 - I'm surprised remote start doesn't come stock! It is far more likely that the CAN message is there to send a remote vehicle start is there. The question now is, can you see that message being broadcast on pins 6 and 14 on the OBD-II port. Most likely it is on a different CAN bus. Maybe you get luck and it is connected to those 2 pins, but you should certainly check.