I currently have 30,000 + miles on my '84 190D (2.2) wvo conversion without a hiccup. Just last week I had to change the spin-on filter on the wvo side for the first time. Car runs smoother and quieter, very slight loss of power and about 2-3 mpg less on wvo, but otherwise, no issues.

Key is to filter well and provide 180 degree grease to the IP, if you do, I would think any of these older MB's are perfectly suitable. I prefer the 201 for the mileage and handling, many prefer the smoother ride, etc of the larger models, drive what you like.

Regards,
Jim

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2005 C240 4matic wagon (daily driver)
87 190D - 225K (on loan)
85 190D - 312K (on loan)
2011 Subaru Legacy AWD (Wife's)