what goes there?
 

i have a 1985 300sd, there is a whole in the interior near the sunroof, right in the middle. next to the dome light. it looks like something was there like a button or knob. Now it's just a hole. I can't get any pictures on the internet, and i don't have the owners manual. Anybody KNow?

Rear view mirror or the center sun visor?

nope. starting from the windshield, it goes sun visor, dome light, then the mystery hole. I found a picture on ebay of the same chassis. not very clear but i kinda make out there is something there. i circled the spot.

what is it?

cabin temp sensor for the automatic climate control

thanks
 

oh so they moved from the dashboard to the roof.. huh? hmm that going to be a fun part to find....i've never seen that before,... this is my first 85 w126, my da had a 1991 126, but i don't recall the temp sensor.

hmm, actually the sensor is there, it's the grill that's gone.