Mk4 (Smart Car / STLA Small platform)
Diagnostic port location (OBD)
Illustrative — for orientation only.
RHD (UK): Driver's side, lower dashboard to the right of the steering column, in the area above the bonnet-release lever and below the light switch cluster. The 16-pin connector sits behind a small trim section in the lower fascia. On left-hand-drive cars the port mirrors to the lower dashboard left of the steering column. Position is consistent across PLUS and MAX trims; the petrol/MHEV hatch and the electric e-C3 share the same dashboard and connector position. If it is not immediately visible at the steering-column edge, check just inside the lower edge of the fascia near the kick panel — Stellantis small cars on this platform place it low and slightly recessed.
On most build dates the 16-pin connector is exposed at the lower fascia with no cover. Where a trim car has a small clip-in blanking panel over the lower-dash recess, prise the edge gently with a fingernail or trim tool to expose the connector — no fixings to undo.
Loading remaining details…
