Does anyone know in which model year this was introduced on the ST2? I have a printed copy of the 2002 workshop manual which includes this, fed through position 7 in the main fuse box; on the other hand my e-version of the 1998 wiring diagram (in colour! really useful) suggests no socket fitted.
Thanks for that -- looks like the changeover year is either 1999 or 2000 (does that also go for ST3/ST4 variants?)