Model 450/3/4 transmission service procedures including oil level checks, STAR DIAGNOSIS connection, Trust Plus program status, and adaptation programming steps.

Service procedure table for smart 450 manual transmission with STAR DIAGNOSIS diagnostic steps and menu navigation instructions.

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See all Powertrain figures for the Fortwo (450), 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.