All those schematics are great! Thank you! They will for sure come in handy! I am scanning all of them and am at a loss on a couple pieces that fell out of the dash when everything was removed. Below are 2 really thick washers? I cannot figure out where they would go? Is it what I have circled on the schematic? They call that a grommet so I assume that is not it...?
I am afraid these are not what you are indicating on the attached drawing. What you show there is a grommet A 000 997 18 81 for the air control flap wire. Only one piece needed for a car. Please note that both in SLS-HH shops and in Niemoeller, when you go to section drawings and mark the part, you will often see the picture of the part. In Niemoeller they will give you also Mercedes PN and quantity required.
At SLS you can scroll through parts list with pictures.
I am not sure what the grommets you are showing can be if they belong to heating and ventilation. Maybe they are "legs" for something heavy, blower housing or heat exchanger.