I'm posting my experience with the MCU2 upgrade (2015 P85DL AP1) in case it helps anyone
Background:
- Pre-History:
- MCU1 was showing signs of failure for a few months (i.e. rebooting every time I entered the car)
- I think the problem was made worse beccause I had to park outside the last couple of months and it's been really hot
- 2020-07-25:
- While driving, I lost my Spotify connection while driving -- I parked the car, but when I returned the main touchscreen wouldn't turn on
- I immediately drove to the Tesla Service Centre (without signal lights!), and I was surprised that they took the car in for diagnostic right away
- After multiple attempts to revive the MCU1, it was declared dead
- I chose to upgrade to MCU2 and they gave me a loaner car
- 2020-07-30:
- In the morning, I received a text saying the parts arrived and that the car might be ready later in the day if all goes well
- I receive another text at 3PM -- the car is already done!
- I had to redo pretty much all of the car's setup (likely because my MCU1 had already died, since people simply doing upgrades retain their settings) such as User Profile, Bluetooth connection, Homelink, Spotify Login, Sound Mixer Setting, Navigation Settings, Driving Settings, Time format, etc.
Observations/Experience with MCU2:
- Improvements:
- Screen is now very quick/responsive
- Navigation maps render MUCH faster, especially when zooming in/out
- The voice-command button is now functional -- it translates my commands to text extremely well (where as before it used to be chunky and unusable)
- Screens no longer reboot every time I enter the car
- My iPhone apps connects to the car MUCH faster than it did before -- it only takes about 3 seconds compared to 30+ seconds and multiple attempts with MCU1
- The web browser is now functional
- Now have access to the new Entertainment features (Netflex, YouTube) which work great!
- Now have access to Caraoke
- Now have access to the more graphic-intensive games
- Can now play the old Atari-style games (since they didn't even work on my MCU1)
- Stayed the Same:
- The stereo sounds the same to me (but I don't have the premium audio system)
- The touchscreen and dashscreen resolutions appear the same (even though they were replaced)
- Rear camera resolution looks the same
- Did not get any new Sentry Mode options (however, my car doesn't have side cameras)
- The animation on the dash screen is unchanged (but I don't have full self-drive / FSD)
- Disadvantages:
- You lose access to AM/FM/XM radio (but I never used them anyways)
- I had difficulty with my Bluetooth not connecting a couple days ago, but it could have been a fluke (or my phone causing the issue)
Hope this helps!
Pretty much the same experience, in a MCU2 upgrade in a 2015 S85D. NO settings were migrated, so it took 15 minutes to do that, but the Slacker and TuneIn favorites did migrate. Go figure.
What did NOT migrate, and I didnt realize it until home, was the Tesla app functionality - it recognizes the car and its location, but no controls, unlock, etc. It still says the car is “Ready for Pickup”. Have a call into SC to fix that remotely.
I think the Premium sound is better, but maybe that wishful. It wasn’t bad before. All the Entertainment, Netflix, games, etc are now onboard.’
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all in all, pretty pleased, but out a bunch of $$$$.