Ditto. My 617 factory rebuild had the same badge stamped on the front of the motor, near the SLS pump. It's a fair assumption that factory rebuilt 603s have a similar badge.

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-1985 300TD - 324k mi on chassis. MB "Tauschaggregat" 617 motor + 4-speed conversion
Alaska Roadtrip 2009
-2002 E320 Wagon - 197k mi
-1998 E320 Wagon - 310k mi - retired