The replacement part number is usually the same as the original!
FOR the 1993 300E W124.032 the number is 124-440-56-32.
THERE should be a tag with the part number on the harness behind the battery near the computer connection.
MERCEDES Benz Master Guild Technician (6 TIMES)
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44 years foreign automotive repair
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190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)