I scoured a large variety of VCV's during my hunt. The same VCV that was on my 82 300D was also on W115 chassis 300SD's, W126 SD's, W123 240d's and of course all 300D's that I saw. A local yard 79 240D I have seen had the exact same VCV as my 82.

I think theyre all the same...I think. If you know a local MB parts place they will be able to tell you the part for your year and match it to the later models to verify.

dd

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'85 300D, 'Lance',250k, ... winter beater (100k on franken-Frybrid 3 Valve Kit)
'82 300D, 'Tex', 228k body / 170k engine ... summer car
'83 300TD Cali Wagon 210k, wife's car