W116, BENZ AID - COMMON QUESTIONS AND ANSWERS

1982 300D Mercedes dies under load

Was recommended by others to reach out to you for help. I own a 1982 300D that is stalling when under a load The car started stalling when I came to a stop. I figured it was a good time to park it and replace rear cv's. 3 weeks have gone by and I have been having starting issues ever since. I first replaced both the primary and secondary fuel filters, next drained and boiled out fuel tank, blew out fuel lines, removed, cleaned, and replaced 2 of the 5 injectors, checked for any vacum leaks, and lastly fiddled with injector pump adjustment.

Chassis Model Number

W123

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Diesel Engine Specific Aid

1980 300TD engine RPM valeus for 65 mph?

My 1980 wagon seems to rev higher than expected at 65mph. I installed a piezo-tach to get a look at engine RPM's. At 65 it runs about 3200 rpm, consistantly. If I count gear changes, I notice 3 shifts (when in Drive - I understand that in D the car starts off in 2nd). If I manually shift from 1st to Drive I count 4 shifts.

Tranny is properly filled, no abnormal noises either. I replaced both the CV shafts and while I was in the rear end nothing looked odd (had 2 split boots, that's why the change was needed).

Chassis Model Number

W123

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Body and Interior Specific Aid

'82 300 TD Wagon Leveling System Question

Okay, I was wondering if any of you guys could help me. I have noticed that my rear end on my wagon looks fine after I have finished driving. However, after some time goes by when I come back the drivers side has dropped down a couple inches. Also, when I drive, sometimes I hear what must be the leveling pump making some noises that sound kind of like Darth Vader breathing or something. I don't know if this means that I have a leak on the system or what. Does anybody out there know what I need to check/fix?

Chassis Model Number

W123

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Body and Interior Specific Aid

76 240D biodiesel poor acceleration

I've been running 100 percent bio in a 76 MB 240D, just fine for a couple months now, but it's starting to get cold in Oklahoma. Recently I've noticed significant hesitation when trying to accelerate in 3rd and 4th and sometimes at the top end of 2nd. But it doesn't do it on all trips -- just off and on. Is this likely from clogged filters or could it be the injectors? I installed the Monark fine-mist injectors several months ago, and it's been running fine until recently.

Jason, Tulsa OK

Chassis Model Number

W115

Forums

Diesel Engine Specific Aid

87 300d bad cruise actuator

I have narrowed the cause of my non-functioning cruise control to the actuator.
I've read that they can be repairable. But I can't find the specifics about it.
It seems the potentiometer part of it isn't working, so to my mind it sounds like posibly a good cleaning maybe will do the trick. I don't know.
I haven't taken it off the car yet.
Thanks in advance.
mike

Chassis Model Number

W124

Forums

Body and Interior Specific Aid

76 300D Heater Blower Motor Not Working

I found the changeover from a/c to heat problem in my 76 300D was the vacuum switch was not working so I reversed the vacuum lines on the vacuum motor and it switched from a/c to heat. (not really a repair but a quick way to get heat in a cold car) This worked fine for about 3 weeks. Then the blower motor fuse blew. I replaced it with the correct 8 amp fuse and it worked another week. After the replacement fuse blew I put in a 16 amp fuse. (not smart, but I was cold) The blower seemed to work fine, but quit a few hours later.

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Body and Interior Specific Aid

82 300TD Brake pedal sinks to the floor

So, I had to replace my front brake calipers on my '82 300 TD because they had rusted. After putting on new rubber brake hoses and new front brake calipers I of course bled the brakes. However, I got in the car and pumped the brakes last night and noticed that the brake pedal and after a few seconds the pedal would fall to the floor. Do you think that there could be some air still trapped in the brake line somewhere, or is there something else that I should check.

Chassis Model Number

W123

Forums

Body and Interior Specific Aid

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