MK2 (B78)
Key reference: 96742552ZD
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Diagnostic port location (OBD)
Illustrative — for orientation only.
LHD: driver's side, low under the steering column behind a clip-off plastic trim cover above the pedals — the 16-pin socket is directly behind it. RHD (UK): not under the column — it sits inside the glovebox, behind a small removable access panel on the side wall. Same arrangement across C4 Picasso, Grand C4 Picasso and the 2018+ C4 SpaceTourer; the LHD/RHD difference catches people out.
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