Hello and welcome , no idea . but the distribution will be different even within model ranges . Eg , pretty sure the V8 engine in the front of my S203 is heavier than that of a tiny 4 pot diesel in a similar model. My 203 is about 90 cm longer than non AMG 203's ...and the saloon version is around 60/70Kg lighter.
Thats just in one car.
Not sure why you want that info but I am sure it is out there somewhere , so I wish you luck in your quest Js