Diesel Engine 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

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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

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Diesel Engine Specific Aid

84 300SD lock cylinder removal

The key had been sticking when I first tried to turn it over. One morning while in a rush to get the kids to school I put a wrench to the key to make it turn. My problem went from not starting, to not turning off when I turn the key off. The key now turns VERY freely and the steering wheel doesn't lock. I am trying to replace the whole lock cylinder but it doesn't want to leave its home. The cover sleeve won't even budge. The marks on the sleeve(0,I,II) have never lined up with the notch on the cylinder. Is there an alternate route to removing the lock cylinder? Or does anyone know how to get me out of this jam? It is very disheartening to pull into a parking lot proudly driving my old MB, only to pop the hood and press to e-stop to turn the engine off.

Chassis Model Number

W126

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Diesel Engine Specific Aid

84 300sd Throttle Linkage Adjustment

Does anyone have any tips on how to adjust the throttle linkages on a 300sd? I messed up the tie rod that sets the idle the last time I removed the VC to adjust the valves, I want to bring it back down. While I'm at it, I'm hoping to find out what all the other linkages on the valve cover do and see if I can give the car a little "tune up". The tranny hasn't been shifting quite right after I messed up the idle too.

Chassis Model Number

W126

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Diesel Engine Specific Aid

1977 240d Brake pedal hard no travel

I have a 1977 240d The brake pedal has gotten hard to push over the last three days. Now I cant press the pedal at all. I checked the brakes at the wheel and the all look fine. I checked the master cylinder but the fluid level looks fine. I checked the booster and there is very little vacuum on the line, Could this be the problem. Is there a certain amount of vacuum that needs to be on there. Also is there a way I can bypass the vacuum on the booster to see if this is the problem.Am I chasing my tail is there some other avenue I should look into. let me know

Chassis Model Number

W123

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Diesel Engine Specific Aid

1986 190d ran out of fuel!!!???

I ran out of fuel....Engine stopped...I added one gallon from spare can in trunk...car started with little difficulty...I ran over to refuel and filled up.
I drove with out incident for three or four days, but now it will not start. My advisor indicates fuel filter(s??) and strainer may be problem. I have verified fuel in tank and changed fuel filter at front of engine compartment, and still unable to restart. Where is other filter located??
Any help greatly appreciated. Thanks, JEB

Chassis Model Number

W201

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Diesel Engine Specific Aid

84 300SD Vacuum Question

Hi, I recently noticed that my transmission was having one of those downshifting noise when coming to a stop. I Checked this great site and found out that it was a vacuum leak issue. I checked the engine for any thing unusual and I found the vacuum line connected to the green "port?" was indeed disconnected. Connected it back and the tranny had the downshifting issue for while but goes away eventually. Drove the car today and I noticed that the downshifting "clunk" only happens when the engine is cold but shifts fine after the engine is warm.

Chassis Model Number

W126

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Diesel Engine Specific Aid

1977 300D Transmission identification

I’m trying to identify the transmission model in an early production 1977 - 123 - 300D? The transmission has no vacuum lines running to it only electrical wiring (driver side) and a mechanical connection (passenger side). The car has been owned since new, so it’s the original transmission.

VIN# 123 130 12 019871
Eng# 617 912 12 006662
Trans# 123 270 0701 006832

Chassis Model Number

W123

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Diesel Engine Specific Aid

Help solve this mystery: how did my transmission problems go away?

The transmission in my 1987 300TDT diesel wagon (W124) has always shifted a bit harshly, especially going from second to third gear, and from park to drive. After I installed new Monark injector nozzles, Beru glow plugs and cleaned out the oily gunk from the intake manifold, the transmission now shifts smoothly. It's like I installed a new transmission, but I didn't.

So which of these procedures (inadvertently) solved my clunky transmission? I'm sure it wasn't new glow plugs!

Chassis Model Number

W124

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Diesel Engine Specific Aid

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