I am guessing compared to a om617, the m103 is like warm butter. As long as the m103 is comparable to my om603 in smoothness, I am fine. Straight six vs. straight six... should be similar I guess.

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08 R320 CDI current

Past
95 E420
87 300D Turbo 5spd
90 300TE
83 300SD
85 300TD
92 400E
85 190D