BenzWorld Junior Member
Date registered: Dec 2007
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I did the OM617 (N/A) into 280S about a year ago. (When I say "I", I mean my $100-an-hour mechanic.)
I love the 108 shape and the 300D engine has a very big reputation for longevity and yes, I was going to run it on biodiesel, so I put my money where my mouth was.
My floorshift 1970 would allow an easy match-up of the transmission, but the engine new arms were fabricated from thick steel, and the engine mounts had to be slightly adapted to fit.
The rest of the 60 hours of work was down to the multitude of changes required to lengthen certain hoses and leads, and shorten others, hook-up the ignition to the glow plugs and a bunch of other stuff.
Assuming you've got the money or the know-how to do the job yourself, the biggest thing to look out for is the vibration that can come into the cabin and through the steering wheel. Make sure you've got plenty of insulation under the hood and see if you can get some engine shock absorber mounts made up.
One final word of warning; make sure you do a compression test of the 300D motor before purchase and installation. The one I had put in worked perfectly on the way home from the mechanic and suffered a radical loss of compression within a week! I have since sourced another engine that's had a top-end rebuild and will hopefully be installing it this week.
Once everything is done, I will hopefully have a beautiful car that will still be running when pump petrol is too expensive for the average motorist.