Gil,
Nice job on getting a good deal. I just ponyed uo $250 for a rebuilt CCU for my 124. I called a couple of wrecking yards (preferred term) and they had nothing that would fit or they could guarantee would work. I wish we had more boneyards like the one near you. You could buy 4 CCUs and still be way ahead.

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LRG
1987 300D Turbo 175K
2006 Toyota Prius, efficent but no soul
1985 300 TDT(130K miles of trouble free motoring)now sold