Question about 1984 Mercedes-Benz Mercedes Benz 300 Class

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84 Mercedes 300 (SD)

Did you ever find out the info u were looking for on your problem with your car?

I just bought one and have plenty of questions like that and more. Like did you find a good resource for informaytion etc.


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Nice people, very helpful, and a wealth of mercede specific knowledge about your car...

Your car is under W123 sub group!

Posted on Jan 12, 2009


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1 Answer

83 mercedes 300 sd transmission neutralized ???

Is it an automatic or manual transmission?

May 09, 2014 | 1983 Mercedes-Benz 300-Class

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My 84 300 turbo d won't shut off when I turn off the key. I have to open hood & hit engine stop lever.

You have a vacuum leak. If you open the hood and look on top of the engine, there is a lever one the right side (looking at the front of the car) with a red "Stop" decal on it. Push the lever and the engine will stop. Look for any small plastic vacuum tubing that may have come disconnected. If you dont find any, it may be a line inside the car. For temporary relief, you can pull the rubber junction from the vacuum tube that goes through the firewall to the inside of the car and cap it. If the engine now shuts off with the key, that does mean your leak is inside the car (4 door locks and trunk release are all vacuum operated and have tubes going to them).

Dec 11, 2013 | 1984 Mercedes-Benz Mercedes Benz 300 Class

1 Answer

Vacuum route for a Mercedes 240d ,1983,automatic ,anyone????

a service manual will have that info, they cost around 15 bucks and save alot of headaches

Mar 13, 2012 | 1984 Mercedes-Benz Mercedes Benz 300 Class

1 Answer

Is there a picture of the fuse box diagram somewhere for a 1989 Mercedes 300 E? I dont have the names of the fuse box to find the fuse for disconnecting the seat belt . light keeps coming on when car is...

Go onto and register (for free) and type in mercedes 300 e and look at the 2nd one in line. Yours is a 124 body and the owner's manual is labeled 200, 230, 260, 300. On page 86 it has a list of fuses and their location. I hope this helps. I've worked on Mercedes for years and I know how hard it can be to retrieve info on these cars. Let me know if you need anything else.

Aug 08, 2010 | 1989 Mercedes-Benz 300-Class

1 Answer

Plz help me , my 300 sd 1984 engine is shaking

you probably are trying to say that the car is vibrating a lot due to the engine. the reason being the screws holding the engine have become loose and need to be tightened.

May 15, 2010 | 1985 Mercedes-Benz 300

1 Answer

1984 Mercedes 300 SD door lock won't turn...

buy a new tumbler. or spray a small amount of penetrating oil in it and wait a day and try to turn it. however it will just freeze up again. the proper way to repair it is with a new tumbler.

Mar 23, 2010 | Mercedes-Benz 300-Class Cars & Trucks

2 Answers

1984 Mercedes-Benz 300 SD My brother was messing around with our 1984 Mercedes-Benz 300 SD and seemed to blow something. Windows, wipers, sunroof, etc.. all not working any more. We replaced the fuses...

If you are certain that the fuse is okay, next replace the Multi-Purpose Relay/Combination Relay. This relay controls all three of those devices and is most likely your culprit. I would try the junkyard first and grab two just to be on the safeside. You'll find it under the fuse box cover on the driver's side engine bay.

Dec 08, 2009 | 1984 Mercedes-Benz Mercedes Benz 300 Class

1 Answer

Hey. 84 mercedes, My sunroof & driver side

I'm no expert, just a tinkerer, but I recently had the same problem with a couple of window switches and emergency flasher. I replaced the switches. It was cheap a easy. I got the switches from autohausAZ for about $30 each (local Benz dealer wanted $180, NAPA wanted $50 but were out). Carefully slip a thin but sturdy blade beneath the tab at one end of the switch (about 1/8inch) and then the same with the other--a bent spring clip holds the switch in. Once you've got the clips loose, the switch pulls right out.

Sep 24, 2009 | 1984 Mercedes-Benz Mercedes Benz 300 Class

1 Answer

Interior parts

Look on Ebay. I bought all kinds of used parts for my Mercedes, (3) 300 TDS and a 300SD. Parts are plentiful for these models and very affordable on Ebay, or perhaps even Craigs List. There is a Mercedes Benz internet forum where members post their sales and needs. I don't know what the import laws are in Malaysia, but I cannot imagine the imposts are high on used auto parts.

Aug 08, 2008 | 1990 Mercedes-Benz 190

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