1979 Mercedes-Benz W123 240D from North America - Comments

27th Sep 2002, 10:35

What things have gone wrong with the car?

Replaced water pumps myself twice.

Replaced drive line universal joints once.

Replaced brake rotors only once.

Rebuilt the front seats once.

Replaced door gaskets once.

General comments?

As an engineer myself, I have to say that this car is the best engineered vehicle that I have ever owned.

While it is not a fast car, its reliability has been beyond that of any other cars I know of, therefor I have to give it a top rating in the overall performance area.

I would only purchase a new car if it is diesel powered, and if I could be certain that it would be as reliable as my old 1979 Mercedes 240D diesel.


27th Apr 2003, 02:20

The only thing I want to ask is how do you compare Mercedes diesel reliability to a VW diesel reliability. Say where a Passat 1980 diesel stands against a 1980 Mercedes diesel?

Please reply me at

kamran_ali505@hotmail.com.

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29th Aug 2004, 02:33

I own a 79 Mercedes 240d, I am very happy with the car, but it uses a lot of oil

I wonder if you know the problem, is it o rings or more than just that?

The smoke is sort of bluish / white, it uses about 5 liters in 3000 km.

The car is great and it takes me everywhere at 110 / 120 km /hour.

Thanking you

jorge jimenez.

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13th Jan 2005, 11:32

I have an 88 BMW and I'm wondering how you replaced the you joints considering that the joints are staked in place, and run on a balancing machine. please email me at sjcrail@hotmail.com.

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22nd Apr 2005, 13:47

I love my 1981 Mercedes Benz 240D...i got rear ended and it is like a tank. 2004 Yukon was totaled...me...a nasty dent, but other than that everyone was OK. they don;t build them like they used to.

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18th Nov 2006, 15:55

I own a 1981 240-D purchased in 2004 with 131,000 miles on it. Yes, it is slow, but a great car. I've gone 31,000 trouble free miles. One problem: In 30,000 miles, I'm on my sixth alternator. I've been replacing with re-manufactured units, but the most miles I've gotten on an alternator is 7,000 without it failing. Any ideas? Should I bite the bullet and buy a new alternator? Any ideas are appreciated.

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8th Jun 2007, 21:42

Six alternators in 30,000 miles suggests that you have a bad voltage regulator. Have you tried replacing that?

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29th May 2008, 21:10

I think the alternators are prone to getting soaked in water splashed up by the front wheels.

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3rd Jun 2008, 08:42

Yes I think you right. If I go over a deep puddle the battery light comes on for a few seconds in my 83 240d.

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3rd Jul 2008, 12:45

Spray the back of the alternator with wd40 or similar. The alternators are in a bad place. Sometimes at low speed my battery light comes on when going over puddles.

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15th Sep 2008, 09:13

I just bought a w123 240D, great car but fuel consumption is a little excessive and have observed that it's producing whitish smoke.

Anyone knows why please email me on dyonsl@gmail.com.

However, it's a very stable car, very powerful and the take off is okay with me as I'm in Zimbabwe no need for speeding, fuel is expensive here.

Radiator was leaking and this tended to affect the alternator on some occasions. Fuel consumption approx 10km/litre, is this okay or it should do better.

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