I don't know the E300D, but I think a Denso compressor means a swashplate type, like a Sanden SD7. The compressor in my 1996 Plymouth is a Denso, and likely similar inside, with just different mounting holes. The trick to removing the clutch is that you must have an impact wrench, since otherwise the innards will just spin (no way to secure them). My center bolt (10 mm hex I recall) has left-hand threads, so set the impact to "forward" or "screw in". With bolt out, you can pull out the outer disk w/ splined hub. Don't loose the shim washers (if any) since they set the air gap. Clean the innards good and you will see a circlip which attaches the pulley (w/ bearing) to the housing. At that point, you could just replace the bearing, which is fairly standard (double ball-bearing ~$25 ebay), if you have a shop press. The magnet attaches w/ 4 bolts.

It isn't hard to rebuild the innards, but all you will be changing is the shaft seal. A bunch of plates are on each side of the cylinder center section. They only fit in one way, so almost no way to mess up, except a rebuilder for the Denso in my 2002 Chrysler did by putting 2 thin flapper plates, stuck together, on one side and none on the other. It still worked, but noisy and not well (backer plate served for a time as a flapper, leaving witness marks on it from the ports). I tore my 1996 apart for forensics and practice. It was seized. One aluminum piston had worn off the black anodizing which made it gall on the aluminum cylinder, at ~180K miles. If you get more life than that, consider it lucky.

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1984 & 1985 CA 300D's
1964 & 65 Mopar's - Valiant, Dart, Newport
1996 & 2002 Chrysler minivans