Welcome to the Forum, whytlotus !
Congrats on such a beautiful car - what model ?
To answer your question, tell us what your experience level is with that 3D AAT502 Finishing Polish and the Random Orbital model you are going to use..
Do you have lots of pads? What brand, color, and size ?
In my experiences with lots of Black Mercedes vehicles, their paint is pretty darn hard ..
I use only Rotary Power with correct compounds and polishes actually made by Menzerna and other German manufacturers, for Mercedes paint and never have an issue..
There are probably a lot of other products that work well and some of the guys here will chime in on them..
I have never used 3D AAT 502 finishing polish, so cannot comment on that, but will do research and see what I can find out about it..
Hopefully, the people who sold you the Mercedes have people who know how to deliver it to you in Flawless Condition, so all you have to do then is think about what to put on it to help keep it protected..
It is black and coming from decades of many personal black vehicles, and Detailed hundreds more, the most important thing you can do to it is to not touch it as much as possible, and then when you have to , it needs to be a really good car wash soap that is very slippery and maybe leaves a little protection on there..
Drying it is where a lot of defects can also be put into the paint that will show up, so I only use a Metro Master Blaster to get as much water as possible off the car with the air, and then use a good QD like Optimum Opti-Seal sprayed on a very soft, clean microfiber to gently get whatever little tiny droplets are left..
Opti-Seal at Store here ---
https://www.autopia-carcare.com/opti-seal.html#.WpoKFmpzb3g
Good luck with the Delivery of your new car !!!
Hope it all goes well !
Dan F