I see, thank you for the response.

@Tony4Ya
I only added attachment point and left everything else the same to prevent two same looking Benz in game which one could tow while another cannot.

Thus,
You should only enable this edited version or the original one.
You SHOULD NOT USE BOTH of them at same time.

It is compatible to switch between this one and the original one in a saved game or server without problem.

The client side has to have the same mod as the server does.
And if client side runs into Benz xxxxx files dose not match sorta things.
The client side should delete this mod or the original one manually depending which one you are using.

Do I need to replace the original mod or is this an addition to that one?

I was wondering why the original mod cars couldn't tow. I guess the creator forgot to add the attachments points. Thanks for the fixes!