Hmm..on my car the line to the EGR comes out of a piece mounted near the driver's side fender. There are several lines connected to that thing but I will have to look at the sticker on the car again as I can't remember what the piece is called. I discovered my EGR wasn't working yesterday (I saw nothing in that little 'window' when I gave it vacuum) so I disconnected it and plugged the line.

Thermal vacuum valve - is that another name for this mysterious 50C switch? I guess I'll do a search.

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Ralph

1985 300D Turbo, CA model
248,650 miles and counting...