1972 280SE rough running - Page 2 - Mercedes-Benz Forum

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post #11 of 14 (permalink) Old 03-20-2016, 08:20 AM
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The 6 cylinder 280se w108 is mechanical fuel injection. The w108 4.5 is D jet. When i first bought my 6 cylinder 280 the main fuel filter in the engine bay was absolutely filthy. It was caked with dirt in the bottom of the canister. As suggested the tank screen would be worth a look and change. I also fitted an inline clear filter between the tank and fuel pump so i could monitor cleanliness. also add some protection for the fuel pump.
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post #12 of 14 (permalink) Old 03-20-2016, 05:53 PM
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1972 280SE rough running

6 Cylinder Injection Styles:
I don't believe the SOHC m130 engines ever came in a d-jet variant. I believe the m130 was last in 1972 cars, while the m110 dohc seems to have replaced it, a direct replacement in such cars as the w114, where the 1973 year had the w114 had the diagonal firewall supports eliminated in order to fit the m110 dohc. I believe the m110 was available in D-jet right from the start. I know the m110 was used in w116 cars, and don't believe the m130 was used in w116 cars. I also don't believe that the m110 ever went into any w108 at the factory. I believe the m110 went to k-jet at the end of 1976.

V8 cars:
6.3 are not d-jet. I'm not sure what it is but assume it is the same mechanical Bosch injection.
M116 and m117 were never used i with the older mechanical injection. They got d-jet from the start and switch to k-jet around the beginning of 1976.

So... I don't think there were ever any d-jet 6-cyl w108, and doubt there were any mechanically injected early w116.

And my w108 is a 1973. I know the w108 and w116 had some overlap, but assume it was limited to the 1973 model year, which you often can't find for a w108 despite having seen many 1973 w108 cars.


Edit:
So the important thing is that I'm pretty confident Kent's video applies.
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Last edited by Fonzi; 03-20-2016 at 05:57 PM.
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post #13 of 14 (permalink) Old 03-22-2016, 08:32 PM
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I always had the impression that 1972 was the very last year of production for108 and 109 models .
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post #14 of 14 (permalink) Old 03-23-2016, 11:48 AM
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The Mercedes-Benz W108 and W109 are luxury cars produced by Mercedes-Benz from 1965 through to 1972 and 1973 in North America only.

https://en.wikipedia.org/wiki/Mercedes-Benz_W108
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