Yes the car is a 96 W210, paint code 040.

I am unclear as to if this process will help the old factory paint or will hurt it.
I know the eventually I will have to repaint the entire car but the way paint shop was telling me about the process was that it would help the shine and overall apperance of the car. He may have just tried to sell me a line. I still have time before I drop off the car and so I wanted to get as much info as possible before then.

The paint is in decent condition otherwise.
There are a few light scratches that are only visible in certain angles which this process may help.