Does anybody know if a W126 CCU (part # 126 880 02 85) will work with my 1985 300D? I'm looking at pictures online, and they look identical. Thanks in advance!

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'85 300D 190K miles
running on B100 Biodiesel since 156K, SCRATCH THAT! I can only find Biodiesel at 1 location in Houston! (not very convenient)