Glow output stage N14/2 removal and installation procedure for Smart Fortwo 454 engine 639.939 with numbered callouts and torque specifications.

Engine bay diagram showing glow plug output stage location with numbered parts and removal steps

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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.