I am wondering if I should be concerned or not?

I have a 2002 E430 4MATIC.

A couple of months ago, the rear passenger window would not close all the way. My youngest son put the window down and I hit the express to close it and it hit the top and then dropped about an inch. I thought it was my son pushing the button, so I gave him heck and hit the express again and it did the same thing. So I hollered at him this time and did it again. Again the window dropped by it self. He said that he wasn’t doing it. So I did it several times and every time it did it again. So I closed it by not pushing the button in the whole way to the express and got it close. Problem has not repeated it self since then.

On Monday I could not close my sunroof with the overhead switch when I got to my destination, I kept trying and it didn’t work so I figured I would try with the remote. Got out of the car, pointed the remote at the door handle and it worked. The sunroof closed. Fine!

This morning, when I got into the car and started it I didn’t have any sound. I turned the knob on the command and went full bore and sounded like blown speakers. Turned it back and instant off, turned it back up and it crackled and same thing. I turned the command off and on several times while I was driving and that did not fix it. I thought the command went out. Lucky I am still under warranty till January. I got the idea to pull over and shut the car down and restart it. I did that and the problem went away. Everything’s fine.

Are these just little quirks from a car that has so much integration? Or should I be worried that something is happing and right after my warranty expires, bam!