I have heard that the M Class have Class 3 hitches and heard that you take the panel out like you are changing a spare tire. After the hitch mount is there, you cannot cover it up. I was wondering if there was an aftermarket system that would allow you to leave the receiever there and cover it up when you don't want to use the hitch by removing the hitch and covering up the receiever. Essentially what I am looking for is a hitch system that can be concealed when not in use. TIA

i'm not aware of any way to conceal the receiver. it seems unlikely that you could do that as the receiver sticks out a little beyond the bumper. my dealer gave me a rubber cover/insert that improves the appearance somewhat (and protects your legs when you have the hatch open to load/unload) - i'm sure there are more interesting covers (mine is black, no logo) but i think that is the only concealment you will find.

So you take the plastic panel off and stick a hitch cover in it and it looks OK? Do you have a pic? Thanx

that's basically right (if i' understanding you).

i'll try to post a photo tomorrow.