When I did this, I removed the automatic shifter. It comes out easily and makes it much easier to remove the dash. I also removed the steering column and wheel from the dash to make it easier to maneuver.
The ecoboost doesn't have a Mass Airflow Sensor, just a temperature sensor for the inlet. It will start and run with the air cleaner duct removed from the turbo.......
Unfortunately, the dash does have to be replaced, you might be able to find a used one in a junkyard, As far as removing the dash, it is a big job, but not really a hard job. If you do some searching on here for air conditioner evaporator leaks or replacement, you'll find several threads...
Disconnecting the nanny plug interrupts the data communication to the ABS module, which would explain your issue. Most everything having to do with traction control, stability control, ABS and acceleration will be disabled.
Check the refrigerant pressures, if they are normal, then it may be a blend door problem. If the charge is low, then you've got a leak. On mine, there was a definite diference in temperature between the driver side and the passenger side and it was for sure a leaking evaporator.
It's a big job, but not a difficult job.. The links that Vlad Soare posted above will give you a general idea of what's involved. You may also find this thread helpful: https://www.mustang6g.com/forums/threads/a-c-evaporator-replaced-due-to-leak.136187/
I did my 2016 myself, took about 2...
The glovebox door is actually the knee airbag for the passenger, removing it is a little involved compared to most others. You can disconnect the snubber (keeps the door from flopping open) and lower the door to fully open. Getting to the filter isn't too bad, lots of youtube videos on this.
Ahhhh, you have a European spec car, which has a "deployable bonnet". There is a piston under each hood hinge that is supposed to extend during a frontal impact. The idea is that if you hit a pedestrian, the back end of the hood will be raised up to soften the impact of the pedestrian onto the...
Well, learned something new! Just as an aside, my 88 Porsche 928 also has grill shutters, which, according to Porsche literature, were there for better aerodynamics at higher speeds.........
Lower left light? Are you talking about the fog light? If so, see if the right side behaves the same way, it's normal for the fog light on one side to be turned off when the turn signal on that side is activated. This is done to make the turn signal light more visible...
I assume you bought this as a used car? If so, the previous owner may have removed the shutter assembly. I don't believe the rubber flap you have is a factory installation.