Understood re Mercedes supplier on the driver's L/R side mirror switch.
Problem with my 2013 S was, for the entire time I owned the car, the L and R selector buttons worked poorly. If I touched the L button, say, the red light would go on, correctly, but nothing would happen once I started trying to move the left mirror. I always, always had to tap it two or three times for it to "engage." And then the latency between moving the actual mirror control and seeing the mirror motors engage and move the mirror accordingly, was always surprisingly long--500 milliseconds? 1 second?
Seems like a minor thing, but it becomes and issue when you're cognitively overloaded in a busy Post Office, say, or shopping center parking lot, backing into a space, and cars are all around, drivers anxious to get past you, and pedestrians and/or dogs or kids or whatever are here and there, and you're trying to be fully aware of all of that while NOT hitting the curb and causing more wheel scratches, and in the middle of all of this you try to use the L/R side mirror controls and they just. do. not. want. to. cooperate. in. real. time. the. way. they. should.
That's why I am dismayed to see these things still on Tesla's flagship vehicle 7 years later.