I don't know , what's your vin or complete engine number I'll try and look it up.
602.91/603.912 my wis manual shows DN 0 SD 265

DN 0 SD 265 shows up for 602/603 .96x,.97x engines.

DN 0 SD 314 shows up as a DN0SD265 replacement for car 124.128, engine 602.962 and standard part for USA as of 04/1992

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1992 300SD 140.134 Sold