Shift mechanism selector drums and sliding blocks for 1st and 2nd gear engagement, chassis 451 automated manual transmission.

Diagram of shift mechanism with selector drums a and b, and two shift position diagrams labeled 1 and 2.

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See all Powertrain figures for the Fortwo (451), or browse the full figure library. Part numbers and callouts are community-sourced and cross-referenced against the manuals — confirm with your VIN before ordering.