Automated manual transmission shift mechanism selector drums and sliding blocks for 3rd and 4th gear engagement.

Shift mechanism diagram showing selector drums, sliding blocks, and gear position grids for smart fortwo 451.

View full-size image ↗

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.