• 1987 Mercedes 300SDL w126 603
• It is a part that helps divert air flow to the oil pan.
• It is located underneath the fender, forward of the tire
• The drivers side part number is 126 884 0735DV
• Looking for the name of the part...
• Looking for the part number for the passenger side of the same part
• Pics are attached
• Tried support with Peach Parts, interweb, google, -- no luck there.

Attached Thumbnails

   

It allows air that's been through the oil cooler to vent into the wheel well. There no corresponding cooler on the passenger side so you can use a panel from a gasser 126. I don't know the part number but wrecking yards should have it.

Sixto
98 E320s sedan and wagon