W116, BENZ AID - COMMON QUESTIONS AND ANSWERS

Vacumum lines have oil

I have a 1980 123 300D non turbo, shut down was acting slightly slow after testing nothing appears to be leaking and pump is producing a strong 23psi, upon testing fuel shutoff valve it shut off under two pumps from mitivac, after testing and re-connecting shut down is excellent but lines are coated with oil. so 2 questions here: 1) is there any way to clean out the hard lines without completely replacing and only replacing the rubber connectors?

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Diesel Engine Specific Aid

Taxonomy upgrade extras

Questions and Answers

Chassis Model Number

W123

300TD Losing Power at Altitude

I was driving to go skiing in my 1985 300TD wagon. The car, as always, ran like a champ. When I got to the road to the ski resort at 6,000 feet, the car lost power. You could stand on the accelerator and hear a whining noise from the turbo, but the car would barely go. When we left, as soon as I got below 6,000 feet again the car ran like a champ. The next morning we drove to the resort again, same thing. What would cause this and how can I fix it? Bill Brewer Tehachapi, California

Chassis Model Number

W123

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Body and Interior Specific Aid

Which manual transmission fluid?

OK, I am working on fixing up my old 1983 240D, I was thinking about changing the manual transmission oil, due to the fact that I have no idea if its ever been done. What type of fluid can be used? The manual I have says Type A automatic trans fluid, which I don't remember seeing in the stores. I saw a listing on ths site for 2 liters synthetic of gear oil. Is that compatable? Even though the manual says ATF type A? Thanks for your help!

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Body and Interior Specific Aid

Taxonomy upgrade extras

Questions and Answers

Chassis Model Number

W123

Auxiliary electric water pump needed?

I'm going to order and install the Climate Control Servo bypass kit for my 1980 300SD. The original servo is no longer working, neither is the auxiliary pump, and I'm tired of no heat control. Right now it's all heat all the time. The auxiliary pump has been broken for a lot longer than the servo, and I've been able to get adequate heat from the climate system. My question is, do I really need the auxiliary pump? I know it's recommended, but aux pump only really works during idle. Why can't I just put a U shaped pipe there in place of the auxiliary pump?

Chassis Model Number

W116

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Body and Interior Specific Aid

123 power window issues

Hey, I have a 1982 240d and am having some problems with my power windows. First, on the back driver side window, will go down, but it will not come back up, and on the back passenger side, the window goes up and down, but it goes really slow. Any suggestions? Also if anyone knows of any place in Washington state that I could get parts for my mercedes, it would be very appreciated. Thanks.

Chassis Model Number

W123

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Body and Interior Specific Aid

Vacuum Routing - 1983 300sd

Hey Kent: The vacuum book has help alot,but I have a problem that I cannot find help anywhere. The 3/2 valves are really 2 on top of one another. When I got the car several of the curved lines were rotted,and where they plug into the plastic 5-way connector ( which the rubber conector plugs into) was missing tits. So I used the diagram for the 80 to 81 300D and 240D trying to get the vac working right.I stopped the clunking slowing down to a stop.1,2,an 3rd shift ok but early,but 4th wants to slip then shift. Unless you drag race,it shifts fine.So I drive her in 3rd and shift to 4th on my own. Will the diagram I used work?

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Diesel Engine Specific Aid

Taxonomy upgrade extras

Instructions

Chassis Model Number

W126

removing the glovebox door lock on an '85 300D

I need to remove the lock on the glove box door in order to replace the wood trim strip. I got the black plastic glove box inner liner off. The sliding plastic lock appears to have four tabs that lock it in place in the sliding track. I tried to push in those tabs with a screwdriver, with no success. Is there some trick to removing the sliding lock piece?

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Body and Interior Specific Aid

240D Speedometer Inaccurate

Hello, I have a 1983 240D, manual transmission. The Speedometer seems to read about 8 - 12 miles slower than the real Speed. The wheels on the car are OE. I have had the car since about 130,000 miles. It now has 150,000. The previous owner said this has been a long running issue that they never bothered to look into. I get confused sometimes at my real speed (especially if the police are behind me!). Any tips on what I should do? Replace cable? Or replace Speedometer? Thanks!

Chassis Model Number

W123

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Body and Interior Specific Aid

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