I thought I remembered a thread on here that concluded otherwise. I'll do some reading before I install one. But , I did pick a nice one up at upullit - on sale for five cents ($.05). It's going to be a bit tight on the W123 due to the A/C receiver dryer that isn't there on the W115.

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80 300SD (129k mi) 82 240D stick (193k mi)77 240D auto - stick to be (153k mi) 85 380SL (145k mi) 89 BMW 535i 82 Diesel Rabbit Pickup (374k mi) 91 Jetta IDI Diesel (155k mi) 81 VW Rabbit Convertible Diesel 70 Triumph Spitfire Mk III (63kmi)66 Triumph TR4a IRS (90k mi)67 Ford F-100 (??)