It allows accessing the internals of the car via the OBD2 port. If you don't know what you are doing you could make a mess that would be expensive to recover from. I used it to enable the DRLs in a 2013 Fusion Energi when the dealer refused to do it. By default it is read only and can't cause problems IF you have a quality OBD2 adapter. The ones that are inexpensive are an invitation to trouble. There is an extra license required to be able to write back to the car.
All of my comments are with respect to the Windows version. I know nothing about the version that runs on a cell phone.
Plan ahead. I rewired my garage 3 times over the years.
20 amp 240 volt circuit for 2013 Ford Fusion Energi. (12 gauge copper wire)
50 amp 240 volt circuit for 2014 Tesla Model S (6 gauge copper wire)
100 amp 240 volt circuit for 2016 Tesla Model S90D (2 gauge copper wire)
Fortunately no rewiring was required for the 2021 Ford Mustang Mach-E Premium AWD ER.
The voltages in the US are 120/240 and have been since the power grid was created.
When a build is scheduled it means that they have all of the parts scheduled to arrive for the build.
They don't have the additional parts the options add would require.
Talk to your dealer to see if he will allow you to place another order, with the additional delay, for what you want.
He might agree since he would have the original order on his lot to sell to someone else.
Question about the new, to me anyway, ordering process.
I ordered a Mach-E Premium on January 6.
On February 18 I received an email that said it was scheduled to be built the week of May 24.
On the website I used to place the order it says
Scheduled for Production
Week of
with a green check mark in front of Scheduled.
Is this website typically behind on data updates? The green check mark appeared at the same time I received the email.
Trains are slow and don't take a direct route. My last car came from Mexico via an interchange yard in Chicago to reach Philadelphia PA. Mexico to Chicago was on Union Pacific. Chicago to Philadelphia was on CSX.
Did you wait until the ambient lights turned off. A single LED is not going to cause the battery to die. The multitude of microprocessors that are always on will do that job.
I find that if my car will be unused for more than a week I have to connect a smart battery charger to the 12 volt battery.
With the car off open the passenger door, get in, and open the glove box. After a period of time, that I did not measure, there was a click and the light went out.
It appears to be connected to the ambient lighting circuit. It's an LED so the load is minimal.
Set your cellphone to record a video and place it in the glove box with the camera pointing up.
Close the glove box.
Wait 10 seconds.
Open the glove box.
Stop the recording.
Play the recording and you will have the answer.