W123, Factory Books and Manuals

79 240d breif power increase?

So I was out running around town and the 240 was its normal slow self when all of a sudden I had a power increase for about ten minutes. Accelerating and driving I could tell a very very noticeable difference. And as fast as the change happened it was gone again. Its never done that before or again. Really though I was maintaining speeds up steep hills that I normally loose 7 mph on! The fuel filters are about 6 months old and I run power service diesel treatment in every tank.

Chassis Model Number

W123

Forums

Diesel Engine Specific Aid

1985 300TD Missing & Hesitating

My car ran fine on WVO for a year (20,000 miles). I have a two tank system, each with its own FM100 filter and booster pump. I have solenoid valves for switching tanks and switching return lines. I also have the sump kit and the coils around the FM100 filter under the hood. My car starts & idles fine and drives well at freeway speeds. My problem is under acceleration or going up a hill the car begins hesitating and sort of missing and loosing power regardless of whether I am on WVO or diesel. I switched out every WVO fuel hose. The diesel system is 3/8" hose.

Chassis Model Number

W123

Forums

SVO Fuel Conversion Specific Aid

Damper plate issues 617 turbo 80 300td

Hello, I have searched many forums for an answer to my problem, I need help with. I was driving on the highway and lost my power steering, alternator and water pump(temp. climbing)pulled it over and found the crank pulley as well as all other pully's not turning (obviously). I took the car home after it cooled down for a few hours to have a look. I took off the rad a\c condensor, belts and fan/pulley. After the belts came off the harmonic damper/ main pulley assembly pretty much fell off. The large bolt (27mm) was broken with some still remaining in the crank.

Chassis Model Number

W123

Forums

Diesel Engine Specific Aid

'82 240D - front quarter panel trim piece?

I just lost the trim piece (the chrome and rubber strip) from my front passenger side quarter panel on my 1982 240D - it was starting to pop out of its snap attachments and it must have just flown off on the road somewhere. Does anyone know where you can buy replacement pieces of this type? I tried our nearest Pick 'n Pull junkyard but they didn't have any 123 body types.
thanks.

Chassis Model Number

W123

Forums

Body and Interior Specific Aid

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

Forums

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

Forums

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

Forums

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

81 240D hard brake pedal in rain

I have an'81 240D that is my daily driver from Marysville to Boeing Field. While she has 295T the car has always received very good care by mechanically adept owners (I am the second owner) and runs beautifully.

Except- when it rains quite a bit after a few miles the brakes will act as if the pedal is “hard” or fading and it takes longer for the car to stop. If I hold my foot (medium to light pressure) on the brake for a few moments, there is a barely perceptible pull to the right-then the brakes return to their normal good stopping ability.

The problem may not occur again-not even if I go through a mud puddle. This only occurs when it rains and we’re talking a steady rain! It never occurs with dry pavement or simply moist pavement (fog, misting etc.).

Chassis Model Number

W123

Forums

Body and Interior Specific Aid

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