Tire pressure and backup camera

MB dealer says that the reason my tire pressure monitor fails intermittently is because I installed a (non-factory) backup camera.
I think they don't know how to fix it and so jumped on the only non-standard part of the car as the problem.
I understand the tpms are, so that is the only way they could interfere, is if the are on similar wavelengths.
I could be wrong. There are much smarter people at mbworld that may have a solid answer.
No, it is wired, and it worked for 7 weeks without a hitch before the TPM started going bonkers. We will disconnect the camera, and I'll drive the car for a while, and the TPM problem will come back. If the dealer is rational, he will say, "OK, so I guess it wasn't the camera". If they are truly crazy, they will say that the camera caused a problem, but a second TPM problem arose independently. Stay tuned...



