[HB_Dad]

So, does anyone know what the hell the port on the rear bumper on the passenger side is for?

I asked this at the LA Auto Show premier for the '06 model and they had no idea. My dealership's service department isn't sure either.

I popped off the cap and found what looks kind of like a pop-in port, but what does it do?

 

[Peaty]

sorry for the repost

It's for the rear tow eye hook to screw in. Look on page 9-16 of the owners manual The front one is just to the inside of the right front fog lamp (notice that part pulls off)

(you need to find a new dealership

 

[Ravie]

yes that cover coms out and you screw your tow eye in the hole mercedes benz has the same thing