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Originally Posted by A. Rosich
The evaporator issue on W140s is the SAME for all model years, the difference on 98-99 models is that they have not been around as long as previous models, so they haven't started to fail yet.
On the other hand, the original M-B evap is just a betting game, it could last less than year, it could last up to five. It all depends on your luck. If it lasts more than five years, consider yourself very lucky. That is why I will always consider original evap fixes by M-B a tricky solution.
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. . from you. What 140 post would be without A.R! Hope you have been well?
My comment, and I know that saying this will severely tempt the gods, is that I should get a lottery ticket since my evap is 11 years old????
Along the related subject, I changed a small four port ' coolant-coupler' (should have taken a picture) last week while at my tech's shop. Actually he insisted that we change it since they regularly 'crack' and within a minute, all engine coolant is lost; the driver doesn't notice and . . bam. . one fried engine. He showed me an '93 S420 that had a fried engine because of this 4-port 'coupler'. It's located on the back fire wall behind the drivers side of the engine just level to the valve cover.
Now why this story?? When I removed my coupler, he said that get very 'brittle' and break easily; having said that, he grabbed it and tried to break it in half. . . with no success! And he's very strong.
So was that changed just before I bought the car (6+ years ago)? The same question could be asked about my evap. Maybe it's only 6 years old and it's copper???
One other story: In the next bay at my tech's shop was a '95 E320. Also with a toasted engine. This story you might find hard to believe.
The owner stopped at a service station and asked the attendant to gas up and also check the water. He did and said it was very low, so he filled it up.
The owner drove away and within a mile or so, the car groaned, moaned, belched and died. The attendant added the water to the
oil port! Again should have had my camera! The oil was just like chocolate foam. .