BENZ AID - COMMON QUESTIONS AND ANSWERS

81 300d 123 Will not start

I have an 81 300d that I was running on BIO. It was loosing power and stall under a load. SO I removed the injectors cleaned replaced nozzles with monarks, bench tested and re-installed. Car ran then stalled and will not start. I drained the tank and filled it up with diesel. I replaced the fuel lines, filters and lift pump. Also replaced the glow plugs with monarks. Then did a valve adjustment. Changed the o rings on the injector pump, checked ALL banjo fittings and lines, replaced copper washers.

Chassis Model Number

W123

Forums

Diesel Engine Specific Aid

83 300-D Underdash Vacuum Line Connection??

I have an 83 300d. I removed the panel below the steering wheel and found a vacuum line simply resting against the back of my brake pedal. I raced the line and it runs through the firewall into the engine compartment. It is connected to the "T" that is on the bottom of the transmission modulator on the rear of the fuel pump. The other side of the "T" runs to the lower right side of the 5 way connector located on the valve cover. That is if it is viewed from the front. Does anyone know where this vacuum line is supposed to go.

Chassis Model Number

W123

Forums

Diesel Engine Specific Aid

1982 300SD engine mounts question

I see the engine mounts from under the hood. I also noticed what looks like a mini-shock absorber. Is that part of the engine mount? Is it important? How can you tell if it is working? The engine vibrates while in idle but it has no effect on that mini-strut. The rubber mounts are soaked in engine oil but they are not torn. I'm not sure how old they are since I just got the car 1 month or two ago. Mercedes Source has a neat engine mount kit that I can buy but I was wondering if aside form the two rubber engine mounts and the transmission mount, if the mini-strut should be replaced?

Chassis Model Number

W126

Forums

Diesel Engine Specific Aid

1984 300SD ATF level drops when cooled ??

According to the manual, the ATF level should be 5 mm below the low mark on dipstick when at air temperature. I imaging this is because hydraulic fluids expand when heated and contract when cooled. I have the opposite: my level is at the full mark at operating temp, then rises about 2 inches over full mark after it sits overnight. It's as if the torque converter is draining into the pan overnight. The transmission is fine and doesn't leak.

Anyone have any thoughts on this? Thanx.

Chassis Model Number

W126

Forums

Transmission / Suspension Specific Aid

What model Mercedes is best for DIY?

Kent and all,

My youngest son has seen the light! After his 4YO Kia Rio broke a timing belt in Nowhere, Tx. he finally figured out the old-stogey Mercedes Diesel that his dad has driven for 305,000+ miles is the way to go.

He's got mechanical skills but no garage (other than Dad's)and he's on active Duty with the AF Reserve, right now at McCord AFB but soon in Alpena, MI and then on to Charleston for several months-Germany after that.

Forums

Diesel Engine Specific Aid

1959 6 cylinder Sedan Manual Transmission Interchange ??

Hello, I purchased a '59 220S that had the wrong engine and trans in it (mid-70's model). I found an engine with Type Plate M180.III 180.924Z and rebuilt it. I believe the transmission that I used was out of a 190SL, I don't have the number with me. The engine very quickly revs to high RPMs and seems as though the gearing is incorrect. For example, the car seems most comfortable if I am in third gear by 25 mph. I was told that all Ponton transmissions are essentially interchangeable with minor gearing differences, but now I am wondering if I have a problem with this marriage.

Chassis Model Number

Ponton

Forums

Transmission / Suspension Specific Aid

'84 300TD engine shudders while in park ??

Ok. I'm having some trouble determining what is going on after I've driven the car for a while then place it in park.

I get 1-2 seconds of shudder, followed by the same of smooth idle. If the same thing happened while stopped at a light, I might think it was idle speed/fuel delivery related (and it may still be). And occasionally after a spirited run, the engine will shake pretty good when I come to a stop, but smooth out pretty quickly.

But when I put the car in park it's a very quick shudder without much rocking like I get when I just stop in drive.

Any thoughts?

Chassis Model Number

W123

Forums

Transmission / Suspension Specific Aid

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