Cylinder head cover removal and installation procedure for 454.0 model with engines 134.9, 135.9, showing callouts and service steps.

Engine diagram with numbered callouts showing cylinder head cover components and removal sequence for Smart 454 chassis.

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See all Powertrain figures for the Fortwo / Forfour (453), 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.