Just sold my last W123--a sad day it was. Once I get a garage will look forward to wrenching on another, but the day is not in sight so cleaning out the shed of parts, used and new:

Mercedes W123 Parts Injectors Blower Motor Mounts etc Some New Some Used | eBay

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1980 300D (non-turbo, 421k miles)
1984 300TD (turbo, 305k miles)
1985 Vanagon (170k miles)