When this happened to a customer of mine, I installed a diesel alternator on the 300E and it worked fine. You have to slightly correct the wires (2) of them. It will bolt on.
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Benzmac:
Donnie Drummonds
1992 500E (very soon I hope
1981 280GE SWB
ASE CERTIFIED MASTER AUTO TECHNICIAN
SERVICE MANAGER FOR 14 BAY FACILITY
MERCEDES SPECIALIST 8 YRS
PARTNER IN MERCEDESSHOP.COM