W116, BENZ AID - COMMON QUESTIONS AND ANSWERS

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

83 300SD starter removal tips?

Hi:

My starter motor spins and will not engage 4 out of 5 tries, so I need at least a new solenoid.

It looks difficult to get the solenoid out, what with the heat shield blocking the wiring, and because I can't seem to break the (3) screws loose.

I figure the starter has to come out to replace the solenoid. I may replace the entire unit.

It looks like the exhaust head pipe has to move, because the starter looks too big to slip out any other way. Moving the head pipe will also make access to the two starter bolts easier.

Chassis Model Number

W126

Forums

Diesel Engine Specific Aid
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