Mine doesn't have this, but I've seen them on some. They are to the left of the trunk release button. What is this for?

 

I think it something to use a screw driver to be able to move a shifter if your batteries died. But I could be wrong.

 

If you have Parktronic, it's shut-off switch is to the left of the trunk release, I think...

Dunno about the shift-lever release.

 

what is parktronic?

 

Parktronic is an option that fits sensors in your front and rear bumpers and rigs them to an electronic signal inside the passenger cabin that alerts you with lights and an audible signal as you get closer to obstacles when parking. It is supposed to help you parallel park, avoid hitting carriages in supermarket parking lots, etc.

In my opinion, it's a silly thing.

You can read about it at MBUSA.com

 

Parktronic is for the legally blind drivers, and the elderly.

 

Were you referring to the black square on the outside of the trunk next to the keyhole/release?

 

On some its like a thing that goes green when you unlock the car and red when you lock the car. Its like an external key sensor I think. I have only used one w210 with this and it was like a 97.

 

I think the question was pertaining to the black square plastic beside the trunk release switch on the center console.

 

Folding mirror button.

 

Actually, I am referring to the the black square on the outside of the car, in the rear, to the left of the trunk keyhole/release button.

 

If you take a look at this thread, it has a pic of what I am talking about https://mbworld.org/forums/showthrea...threadid=27305

 

You press it, and a fully stocked wet bar appears in your truck when opened.

 

The trunk thingy is only found on the 1997 models. Here is a 1997 upgraded to look like the 2000+ models - even has phoney GPS antenna on roof:

 

On mine it is a little black square with a red and green light.
When I lock my doors, it will flash red, when i unlock, it will flash green. I have the same square on the driver side door, where the lock would be, and on the rear view mirror.

'97 E420 / Kleen'd

 

If I am not mistaken, those are infrared receivers.

It was only recently that the MB key used both IR and radio key controls. The radio opens the door locks while the IR opens the windows.

As in the new cars, you will need to point the key to that receiver on either of the driver and passenger door to open all the windows and sunroof.

The IR portion of the key also is what disengages the lock in the key tumbler to turn the ignition on.

 

Upon close examination, I finally figured out the mystery to the little BLACK BOX next to my trunk keyhole! Observe below!<p> <p>