W123, Electrical

1984 300D, little bell shaped device?

Hi all. I just installed new Bilsteins all the way around and the difference in the ride is noticeable. As I was on my back (driveway project as Mercedessource calls it) putting the driver's side rear shock in, I noticed a little bell-shaped part with a small fuel line or hose connected to it. It is located just in front of the rear wheel attached to under-chassie and in from the rocker panel. I really didn't bother tracing where the hose led to or came from and I don't know if there is one on the other side. My only guess is a vent for the fuel system.

Chassis Model Number

W123

Forums

Body and Interior Specific Aid

Dash smoke 1977 300D

Have experienced following:
1. Attempt to start - no crank and smoke comes from driver's side speaker area. Wait 10 minutes, try again, cranks and starts fine with no dash smoke.
2. Attempt to start later - again no crank, more smoke. Wait 10 minutes, cranks slowly but starts, no smoke.

Examination under dash reveals oil around ignition switch. My current thinking is to rebuild the vacuum pump and clean out all the vacuum lines I can reach.

What to do about the ignition switch? As I understand it, the switch is attached to a vacuum element that must have been polluted. It seems like the switch itself is now polluted too. Should I replace switch alone after vacuum pump rebuild? Or switch and vacuum element together?

Chassis Model Number

W123

Forums

Diesel Engine Specific Aid

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