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Old 03-30-2005, 04:58 PM
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Dieseldiehard
 
Join Date: Oct 2002
Location: Bay Area No Calif.
Posts: 4,369
Hayne's makes good manuals that are easily understood. I highly recommend you start with a Haynes manual.
Mercedes factory manuals can be overwhelming with details and unfortunately they are no longer available from MBNA for the W123 chasis (your car). The (mostly pirated) CD's that are available from eBay are hard to use and in most instances lack the details that the printed copies have.

FYI. There are 2 small rubber O-rings that go on the stem that runs down thru the oil filter. When these get old they fail to seal and let dirty oil bypass the filter stage, resulting in excessive engine wear. A symptom is lower pressure on the gauge or a fluttering oil gauge indicator needle. These O-rings should be replaced at something like 15K mile service intervals (the same time as that at which the valves get adjusted)
DDH
1971 220 (gas) 4-spd manual 106441
1979 300TD w/ ’85 turbo engine 296650
1983 300D 243280
1985 300TD 223470
1987 300D 262300
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