OBD2 port Smart Fortwo - W450 (2001 - 2006) - Find your plug !
ChipPower OBD v4 Chip Tuning Box Plug&Drive compatible with Smart Fortwo Mk2 II 451 1.0 Turbo/Brabus 2007-2015 Tuningbox Petrol ChipBox Performance More Power Less Consumption : Amazon.co.uk: Automotive
OBD2 port Smart Fortwo - C453/A453 (2014 - ...) - Find your plug !
On-board diagnostics
OBD2 port Smart Roadster - W452 (2002 - 2007) - Find your plug !