And I should have added this. We should expect or not be surprised when Tesla says its not compatible. We heard this more than once. Back when we were mounting the rear camera on the front of the car and sending the fed into the center console we heard then that the newer rear camera that was released in Jul '15 would not work. But it did. It was a better resolution than the one we were using and many of us swapped both rear and front. And it would make sense that a Tesla rep would be saying - no - because the parts catalog doesn't say yes. So we just have to consider the source must report the company position. You know they don't like us replacing parts or messing with the car's configuration.
When I added the Model 3 FM Digital Tuner to my MCU2 upgraded '17 and even got it wired up like a factory MCU2, I was told No, Tesla would not make the gateway configuration change necessary to enable it. Even if I paid them to do work that I described. Answer - No. And it was not a local decision. It was not my SC Mgr. She said, corporate had been tracking my team progress in getting one installed and wired properly. We documented what we were doing along the way, and they knew every step we had reported. The SC Mgr said, "we won't support a change to the fleet that is unique to the fleet. I can understand that if it makes my request different than many others in the fleet. I argued that making the gateway change to mine that was needed would make it match factory MCU2 digital radio configurations. So down the road, it would work even after OTA updates. And while accurate, they still said no.
If anybody is reading this, there's info posted from Netherlands side of TMC that tells us that Tesla is offering the digital radio upgrade as an option with MCU2 starting in Oct in Europe with MCU2 upgrade installations. The source even has a text reply from his SC confirming. And he got a price in Euro's Converted to USD, the price will be about $495/$500. So, if you are a MCU2 fence-sitter and losing FM is a big deal, maybe this will help you. No idea when we will hear of it offered in USofA, but at least its news it may be coming.
If you doubt or want to read yourself, follow this link.
MCU2 upgrade mogelijk, maar hoe? Read starting at post #132 and don't overlook #157 I recommend using Chrome to read it, because you can translate with it.