That's a plate for US forces in Germany. It looks like the 1974-1983 vintage which matches your car. The tag is the month and the expiration year in super tiny print.

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-Evan


Benz Fleet:
1968 UNIMOG 404.114
1998 E300
2008 E63


Non-Benz Fleet:
1992 Aerostar
1993 MR2
2000 F250